Key Features
• Industry standard Half-brick
58x61x8.5 mm (2.3x2.4x0.33 in)
• Low profile, max 8.5 mm (0.33 in)
• High efficiency, typ. 93 % at 3.3 Vout
half load
• 1500 VDC input to output isolation,
meets isolation requirements equivalent
to Basic Insulation according to
IEC/EN/UL 60950
• More than 6 million hours predicted
MTBF at 55° C ambient and 1 m/s
(200 lfm) airflow
DC/DC converter
Input 36-75 Vdc
Output up to 40A/100W
PKJ 4000E PI
E
The PKJ 4000E series of high efficiency DC/DC converters
are designed to provide high quality on-board power
solutions in distributed power architectures used
in Internetworking equipment in wireless and wired
communications applications.
The PKJ 4000E series has industry standard half brick
footprint and pin-out and is only 8.5 mm (0.33 in) high.
This makes it extremely well suited for narrow board pitch
applications with board spacing down to 15 mm (0.6
in). The PKJ 4000E series uses patented synchronous
rectification technology and achieves an efficiency up to
89% at full load. Ericsson's PKJ 4000E series addresses
the emerging telecom market for applications in the multi-
service network by specifying the input voltage range in
accordance with ETSI specifications.
Included as standard features are output over-voltage
protection, input under-voltage protection, over
temperature protection, soft-start, output short circuit
protection, remote sense, remote control, and output
voltage adjust function.
These converters are designed to meet high reliability
requirements and are manufactured in highly automated
manufacturing lines and meet world-class quality levels.
Ericsson Power Modules is an ISO 9001/14001 certified
supplier.
Safety Approvals Design for Environment
Datasheet
2PKJ 4000E PI EN/LZT 146 025 R8A © Ericsson Power Modules, June 2007
Characteristics Conditions min typ max Unit
VIInput voltage range 36 75 Vdc
VIoff Turn-off input voltage Ramping from higher
voltage 32 Vdc
VIon Turn-on input voltage Ramping from lower
voltage 34 Vdc
CIInput capacitance 2 µF
IIac Reflected ripple current 5 Hz to 20 MHz TBD mAp-p
PII Input idling power Io= 0, VI = 53 V 2 W
PRC Input standby power
(turned off with RC) VI = 53 V, RC activated 0.25 W
Characteristics min max Unit
TPcb Maximum Operating Pcb Temperature -40 +125 ˚C
TSStorage temperature -55 +125 ˚C
VIInput voltage -0.5 +80 Vdc
VISO Isolation voltage (input to output test voltage) 1500 Vdc
Vtr Input voltage transient for 100 ms 100 Vdc
VRC Negative logic 75 Vdc
VRC Positive logic 6 Vdc
Vadj Maximum input -0.5 2xVoi Vdc
Input TPcb <TPcb max unless otherwise specified
Note:
Stress in excess of Absolute Maximum Ratings may cause permanent damage. Absolute Maximum Ratings, sometimes referred to as
no destruction limits, are normally tested with one parameter at a time exceeding the limits of Output data or Electrical Characteristics. If
exposed to stress above these limits, function and performance may degrade in an unspecified manner.
Absolute Maximum Ratings
Characteristics
Random Vibration IEC 68-2-34Ed
Frequency
Spectral density
Duration
10 ... 500 Hz
0.07 g2/Hz
10 min each direction
Sinusoidal
Vibration IEC 68-2-6 Fc
Frequency
Amplitude
Acceleration
Number of cycles
10 ... 500 Hz
0.75 mm
10 g
10 in each axis
Shock
(half sinus) IEC 68-2-27 Ea
Peak acceleration
Duration
100 g
6 ms
Temperature
change IEC 68-2-14 Na
Temperature
Number of cycles
-40 ... +100 ˚C
300
Heat/Humidity IEC 68-2-3 Ca Temperature
Humidity
Duration
+85 ˚C
85 % RH
1000 hours
Solder heat
stability IEC 68-2-20 1A Temperature, solder
Duration
260 ˚C
10 ...13 s
Resistance to
cleaning solvents
IEC 68-2-45 XA
Method 2
Water
Isopropyl alcohol
Glycol ether
+55 ±5 ˚C
+35 ±5 ˚C
+35 ±5 ˚C
Cold (in operation) IEC 68-2-1 AdTemperature
Duration
-45 ˚C
2 h
Storage test IEC 68-2-2 BaTemperature
Duration
+125 ˚C
1000 h
Environmental Characteristics
Safety
The PKJ 4000 E series DC/DC
converters are designed in accordance
with safety standards IEC/EN/UL 60
950, Safety of Information Technology
Equipment. The PKJ 4000 E series
DC/DC converters are UL 60 950
recognized and certified in accordance
with EN 60 950.
The DC/DC converter should be
installed in the end-use equipment,
in accordance with the requirements
of the ultimate application. The input
source must be isolated by minimum
Basic insulation from the primary circuit
in accordance with IEC/EN/UL 60
950. If the input voltage to the DC/DC
converter is 75 V dc or less, then the
output remains SELV (Safety Extra Low
Voltage) under normal and abnormal
operating conditions. Single fault testing
in the input power supply circuit should
be performed with the DC/DC converter
connected to demonstrate that the
input voltage does not exceed 75 V dc.
If the input power source circuit is a
DC power system, the source may be
treated as a TNV2 circuit and testing
has demonstrated compliance with
SELV limits and isolation requirements
equivalent to Basic insulation in
accordance with IEC/EN/UL 60 950.
It is recommended that a fast blow fuse
with a rating of 10A be used at the input
of each DC/DC converter. The PKJ se-
ries DC/DC converters are approved for
a maximum fuse rating of 15A. If a fault
occurs in the converter that imposes
a short circuit on the input source, this
fuse will provide the following functions:
• Isolate the faulty DC/DC converter
from the input power source not to
affect the operation of other parts of
the system.
• Protect the distribution wiring from
excessive current and power loss
thus preventing hazardous overhea-
ting.
The galvanic isolation is verified in an
electric strength test. The test voltage
(VISO) between input and output is 1500
Vdc for 60 seconds. Leakage current is
less than 1uA at nominal input voltage.
The flammability rating for all
construction parts of the DC/DC
converter meets UL 94V-0.
3
PKJ 4000E PI EN/LZT 146 025 R8A © Ericsson Power Modules, June 2007
Connections
Fundamental Circuit Diagram
Weight
PKJ 4810E PI 35 g
Pins
Material: Brass Alloy
Plating: 0.1 µm Gold over Nickel
Mechanical Data
Pin Designation Function
1 - In Negative Input
2 No pin
3 RC Remote Control
4 + In Positive Input
5 - Out Negative Output
6 - Sen Negative Remote Sense
7 Vadj Output voltage adjust
8 + Sen Positive Remote Sense
9 + Out Positive Output
For more information about the functions see Operating Information
Mounting holes
Ø3.00 [.12] (4x)
5.10 [.20]
12.92 [.51] 23.08 [.91]
38.32 [1.51]
48.48 [1.91]
55.90 [2.20]
61.00 [2.40]
30.70 [1.21]
4.80 [.19]
53.10 [2.09]
57.90 [2.28]
1.80 [.07]
5.70 [.22]
Comp.
1.02 [.04]
1.83 [.07] 3.17 [.13]
2.03 [.08]
Bottom view
Ø2.43 [.096] (2x)
Ø1.42 [.056] (7x)
8.50 [.33]
X
X = 3.60 [.14] or 5.30 [.21] depending on choice of pin length
1
2
3
49
8
7
6
5
12.92 [.51] 23.08 [.91]
38.32 [1.51]
48.48 [1.91]
61.00 [2.40]
30.70 [1.21]
4.80 [.19]
53.10 [2.09]
57.90 [2.28]
Recommended Footprint (Component side)
Dimensions in mm [in.]
5IFEJTUBODFCFUXFFOUIFIJHIFTUDPNQPOFOUJOUIF
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3
1
Primary Secondary
Control
Isolated
Feedback
9
5
6
8
7
Choke
Resistor
Capacitor
Control
4PKJ 4000E PI EN/LZT 146 025 R8A © Ericsson Power Modules, June 2007
Characteristics Conditions
Output Unit
min typ max
VOi
Output voltage initial setting
and accuracy TPcb = +25 °C, VI = 53 V, IO = IOmax 1.485 1.50 1.515 V
Output adjust range IO = IOmax 1.35 1.65 V
VO
Output voltage tolerance band IO = 0.1...1 x IOmax 1.465 1.535 V
Idling voltage IO = 0 1.465 1.535 V
Line regulation IO = IOmax 5 mV
Load regulation VI = 53 V, IO = 0.01...1 x IOmax 5 mV
Vtr
Load transient
voltage deviation
IO = 0.1...1 x IOmax , VI = 53 V
Load step = 0.5 x IOmax di/dt = 1A/µs ±150 mV
ttr Load transient recovery time IO = 0.1...1 x IOmax , VI = 53
loadstep = 0.5x IOmax
100 µs
trRamp-up time IO = 0.1...0.9 x VO15 30 ms
tsStart-up time From VI connected to VO = 0.9 x VOI 20 40 ms
IOOutput current 0 40 A
POmax Max output power At VO = VOnom 60 W
Ilim Current limit threshold TPcb < TPcbmax 46 A
Isc Short circuit current TPcb = 25 °C 50 A
VOac Output ripple & noise See ripple and noise, IO = IOmax 150 200 mVp-p
SVR Supply voltage rejection (ac) f = 100 Hz sinewave , 1 Vp-p , VI = 53 V 65 dB
OVP Over voltage protection VI = 53 V 1.7 2.2 V
TPcb = –30…+90°C, VI = 36 ...75V, sense pins connected to output pins unless otherwise specified.
PKJ 4618HE PI Output
Miscellaneous
Characteristics Conditions min typ max Unit
ηEfficiency - 50% load TPcb = +25 °C, VI = 48 V, IO = 0.5 x IOmax 88.5 %
ηEfficiency - 100% load TPcb = +25 °C, VI = 48 V, IO = IOmax 85 %
ηEfficiency - 50% load TPcb = +25 °C, VI = 53 V, IO = 0.5 x IOmax 88.5 %
ηEfficiency - 100% load TPcb = +25 °C, VI = 53 V, IO = IOmax 83 85 %
PdPower Dissipation TPcb = +25 °C, VI = 53 V, IO = IOmax 11 W
fsSwitching frequency IO = 0 ... 1.0 x IOmax 140 kHz
IImax Maximum input current 1.1 x VOi x IOmax / η / VImin 2.2 A
5
PKJ 4000E PI EN/LZT 146 025 R8A © Ericsson Power Modules, June 2007
PKJ 4618HE PI Typical Characteristics
Efficiency
Efficiency vs. load current and input voltage at TPcb=+25 °C
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Output Current Derating
Available load current vs. ambient air temperature and airflow at
Vin=53 V. DC/DC converter mounted vertically with airflow and
test conditions as per the Thermal consideration section.
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Output Characteristic
Output voltage vs. load current at TPcb=+25 °C, Vin=53 V.
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Dissipated power vs. load current and input voltage at
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Thermal resistance vs. airspeed measured at the converter.
Tested in windtunnel with airflow and test conditions as per
the Thermal consideration section. consideration section.
Thermal Resistance
6PKJ 4000E PI EN/LZT 146 025 R8A © Ericsson Power Modules, June 2007
PKJ 4618HE PI Typical Characteristics
Output Ripple Transient
Output voltage ripple (100mV/div.) at TPcb=+25 °C, Vin=53 V,
Io=40A resistive load with C=10 µF tantalum and 0.1 µF
ceramic capacitors. Band width=20MHz. Time scale: 2µs / div.
Output voltage response to load current step-change
(10-30-10 A) at TPcb=+25 °C, Vin=53 V. Top trace:
output voltage (200mV/div.). Bottom trace:
load current (10 A/div.) Time scale: 0.1 ms/div.
Output Voltage Adjust
Output voltage adjust resistor value vs.
percentage change in output voltage.
1
10
100
1000
10000
100000
0246810
Decrease
Increase
[kOhm]
[%]
Output Voltage Adjust
The resistor value for an adjusted output voltage is
calculated by using the following equations:
Output Voltage Adjust Upwards, Increase:
Radj= [1.5(100+Δ%) / 1.225Δ%- (100+2Δ%) /Δ% ] kOhm
Output Voltage Adjust Downwards, Decrease:
Radj= [(100 / Δ%-2) ] kOhm
Eg Increase 4% =>Vout = 1.56 Vdc
1.5 (100+4)/1.225x4-100+2x4/4=4.84 kOhm
Eg Decrease 2% =>Vout = 1.47 Vdc
100/2-2=48.0 kOhm
Start-Up
Start-up at Io=40A resistive load at TPcb=+25 °C,
Vin=53 V. Start enabled by connecting Vin. Top trace:
input voltage (10 V/div.). Bottom trace: output voltage
(0.50 V/div.). Time scale: 10 ms/div.
Turn-Off
Turn-off at Io=10A resistive load at TPcb=+25 °C,
Vin=53 V. Turn-off enabled by disconnecting Vin.
Output voltage (0.50 V/div.). Time scale: 50 ms/div.
7
PKJ 4000E PI EN/LZT 146 025 R8A © Ericsson Power Modules, June 2007
Characteristics Conditions
Output Unit
min typ max
VOi
Output voltage initial setting
and accuracy TPcb = +25 °C, VI = 53 V, IO = IOmax 1.782 1.80 1.818 V
Output adjust range IO = IOmax 1.62 1.98 V
VO
Output voltage tolerance band IO = 0.1...1 x IOmax 1.758 1.842 V
Idling voltage IO = 0 1.758 1.842 V
Line regulation IO = IOmax 5 mV
Load regulation VI = 53 V, IO = 0.01...1 x IOmax 5 mV
Vtr
Load transient
voltage deviation
IO = 0.1...1 x IOmax , VI = 53 V
Load step = 0.5 x IOmax di/dt = 1A/µs ±150 mV
ttr Load transient recovery time IO = 0.1...1 x IOmax , VI = 53
loadstep = 0.5x IOmax
100 µs
trRamp-up time IO = 0.1...0.9 x VO15 30 ms
tsStart-up time From VI connected to VO = 0.9 x VOI 20 40 ms
IOOutput current 0 36 A
POmax Max output power At VO = VOnom 65 W
Ilim Current limit threshold TPcb < TPcbmax 43 A
Isc Short circuit current TPcb = 25 °C 47 A
VOac Output ripple & noise See ripple and noise, IO = IOmax 150 200 mVp-p
SVR Supply voltage rejection (ac) f = 100 Hz sinewave , 1 Vp-p , VI = 53 V 65 dB
OVP Over voltage protection VI = 53 V 2.0 3.0 V
TPcb = –30…+90°C, VI = 36 ...75V, sense pins connected to output pins unless otherwise specified.
PKJ 4618GE PI Output
Miscellaneous
Characteristics Conditions min typ max Unit
ηEfficiency - 50% load TPcb = +25 °C, VI = 48 V, IO = 0.5 x IOmax 90.5 %
ηEfficiency - 100% load TPcb = +25 °C, VI = 48 V, IO = IOmax 87.5 %
ηEfficiency - 50% load TPcb = +25 °C, VI = 53 V, IO = 0.5 x IOmax 90 %
ηEfficiency - 100% load TPcb = +25 °C, VI = 53 V, IO = IOmax 85.5 87.5 %
PdPower Dissipation TPcb = +25 °C, VI = 53 V, IO = IOmax 9 W
fsSwitching frequency IO = 0 ... 1.0 x IOmax 140 kHz
IImax Maximum input current 1.1 x VOi x IOmax / η / VImin 2.3 A
8PKJ 4000E PI EN/LZT 146 025 R8A © Ericsson Power Modules, June 2007
PKJ 4618GE PI Typical Characteristics
Efficiency
Efficiency vs. load current and input voltage at TPcb=+25 °C
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Output Current Derating
Available load current vs. ambient air temperature and airflow at
Vin=53 V. DC/DC converter mounted vertically with airflow and
test conditions as per the Thermal consideration section.
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Output Characteristic
Output voltage vs. load current at TPcb=+25 °C, Vin=53 V.
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Dissipated power vs. load current and input voltage at
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Thermal resistance vs. airspeed measured at the converter.
Tested in windtunnel with airflow and test conditions as per
the Thermal consideration section. consideration section.
Thermal Resistance
9
PKJ 4000E PI EN/LZT 146 025 R8A © Ericsson Power Modules, June 2007
PKJ 4618GE PI Typical Characteristics
Output Ripple Transient
Output voltage ripple (100mV/div.) at TPcb=+25 °C, Vin=53 V,
Io=36A resistive load with C=10 µF tantalum and 0.1 µF
ceramic capacitors. Band width=20MHz. Time scale: 2µs / div.
Output voltage response to load current step-change
(9-27-9 A) at TPcb=+25 °C, Vin=53 V. Top trace: output
voltage (200mV/div.). Bottom trace:
load current (10 A/div.) Time scale: 0.1 ms/div.
Output Voltage Adjust
Output voltage adjust resistor value vs.
percentage change in output voltage.
Decrease
Increase
[kOhm]
[%]
Output Voltage Adjust
The resistor value for an adjusted output voltage is
calculated by using the following equations:
Output Voltage Adjust Upwards, Increase:
Radj= [1.8(100+Δ%) / 1.225Δ%- (100+2Δ%) /Δ% ] kOhm
Output Voltage Adjust Downwards, Decrease:
Radj= [(100 / Δ%-2) ] kOhm
Eg Increase 4% =>Vout = 1.87 Vdc
1.8 (100+4)/1.225x4-100+2x4/4=11.2 kOhm
Eg Decrease 2% =>Vout = 1.76 Vdc
100/2-2=48.0 kOhm
Start-Up
Start-up at Io=36A resistive load at TPcb=+25 °C,
Vin=53 V. Start enabled by connecting Vin. Top trace:
input voltage (10 V/div.). Bottom trace: output voltage
(0.50 V/div.). Time scale: 10 ms/div.
Turn-Off
Turn-off at Io=10A resistive load at TPcb=+25 °C,
Vin=53 V. Turn-off enabled by disconnecting Vin.
Output voltage (0.50 V/div.). Time scale: 50 ms/div.
10 PKJ 4000E PI EN/LZT 146 025 R8A © Ericsson Power Modules, June 2007
Characteristics Conditions
Output Unit
min typ max
VOi
Output voltage initial setting
and accuracy TPcb = +25 °C, VI = 53 V, IO = IOmax 2.475 2.50 2.525 V
Output adjust range IO = IOmax 2.00 2.75 V
VO
Output voltage tolerance band IO = 0.1...1 x IOmax 2.44 2.56 V
Idling voltage IO = 0 2.44 2.56 V
Line regulation IO = IOmax 5 mV
Load regulation VI = 53 V, IO = 0.01...1 x IOmax 5 mV
Vtr
Load transient
voltage deviation
IO = 0.1...1 x IOmax , VI = 53 V
Load step = 0.5 x IOmax di/dt = 1A/µs ±200 mV
ttr Load transient recovery time IO = 0.1...1 x IOmax , VI = 53
loadstep = 0.5x IOmax
100 µs
trRamp-up time IO = 0.1...0.9 x VO15 30 ms
tsStart-up time From VI connected to VO = 0.9 x VOI 20 40 ms
IOOutput current 0 30 A
POmax Max output power At VO = VOnom 75 W
Ilim Current limit threshold TPcb < TPcbmax 32 A
Isc Short circuit current TPcb = 25 °C 40 A
VOac Output ripple & noise See ripple and noise, IO = IOmax 150 200 mVp-p
SVR Supply voltage rejection (ac) f = 100 Hz sinewave , 1 Vp-p , VI = 53 V 70 dB
OVP Over voltage protection VI = 53 V 3.0 4.0 V
TPcb = –30…+90°C, VI = 36 ...75V, sense pins connected to output pins unless otherwise specified.
PKJ 4719E PI Output
Miscellaneous
Characteristics Conditions min typ max Unit
ηEfficiency - 50% load TPcb = +25 °C, VI = 48 V, IO = 0.5 x IOmax 90.5 %
ηEfficiency - 100% load TPcb = +25 °C, VI = 48 V, IO = IOmax 87 %
ηEfficiency - 50% load TPcb = +25 °C, VI = 53 V, IO = 0.5 x IOmax 90 %
ηEfficiency - 100% load TPcb = +25 °C, VI = 53 V, IO = IOmax 85.5 86.5 %
PdPower Dissipation TPcb = +25 °C, VI = 53 V, IO = IOmax 12 W
fsSwitching frequency IO = 0 ... 1.0 x IOmax 140 kHz
IImax Maximum input current 1.1 x VOi x IOmax / η / VImin 2.6 A
11
PKJ 4000E PI EN/LZT 146 025 R8A © Ericsson Power Modules, June 2007
PKJ 4719E PI Typical Characteristics
Efficiency
Efficiency vs. load current and input voltage at TPcb=+25 °C
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Output Current Derating
Available load current vs. ambient air temperature and airflow at
Vin=53 V. DC/DC converter mounted vertically with airflow and
test conditions as per the Thermal consideration section.
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Output Characteristic
Output voltage vs. load current at TPcb=+25 °C, Vin=53 V.
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Dissipated power vs. load current and input voltage at
TPcb=+25 °C
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Thermal resistance vs. airspeed measured at the converter.
Tested in windtunnel with airflow and test conditions as per
the Thermal consideration section. consideration section.
Thermal Resistance
12 PKJ 4000E PI EN/LZT 146 025 R8A © Ericsson Power Modules, June 2007
PKJ 4719E PI Typical Characteristics
Output Ripple Transient
Output voltage ripple (100mV/div.) at TPcb=+25 °C, Vin=53 V,
Io=30A resistive load with C=10 µF tantalum and 0.1 µF
ceramic capacitors. Band width=20MHz. Time scale: 2µs / div.
Output voltage response to load current step-change
(7.5-22.5-7.5 A) at TPcb=+25 °C, Vin=53 V. Top trace:
output voltage (200mV/div.). Bottom trace:
load current (5 A/div.) Time scale: 0.1 ms/div.
Output Voltage Adjust
Output voltage adjust resistor value vs.
percentage change in output voltage.
1
10
100
1000
10000
100000
0 2 4 6 8 10 12 14 16 18 20 22
Decrease
Increase
[kOhm]
[%]
Output Voltage Adjust
The resistor value for an adjusted output voltage is
calculated by using the following equations:
Output Voltage Adjust Upwards, Increase:
Radj= [2.5(100+Δ%) / 1.225Δ%- (100+2Δ%) /Δ% ] kOhm
Output Voltage Adjust Downwards, Decrease:
Radj= [(100 / Δ%-2) ] kOhm
Eg Increase 4% =>Vout = 2.600 Vdc
2.5 (100+4)/1.225x4-100+2x4/4=26.06 kOhm
Eg Decrease 2% =>Vout = 2.450 Vdc
100/2-2=48.0 kOhm
Start-Up
Start-up at Io=30A resistive load at TPcb=+25 °C,
Vin=53 V. Start enabled by connecting Vin. Top trace:
input voltage (10 V/div.). Bottom trace: output voltage
(1 V/div.). Time scale: 5 ms/div.
Turn-Off
Turn-off at Io=30A resistive load at TPcb=+25 °C,
Vin=53 V. Turn-off enabled by disconnecting Vin. Top
trace: output voltage (1 V/div.). Bottom trace: input
voltage (20 V/div.). Time scale: 10 ms/div.
13
PKJ 4000E PI EN/LZT 146 025 R8A © Ericsson Power Modules, June 2007
Characteristics Conditions
Output Unit
min typ max
VOi
Output voltage initial setting
and accuracy TPcb = +25 °C, VI = 53 V, IO = IOmax 3.26 3.30 3.34 V
Output adjust range IO = IOmax 2.64 3.63 V
VO
Output voltage tolerance band IO = 0.1...1 x IOmax 3.24 3.36 V
Idling voltage IO = 0 3.24 3.36 V
Line regulation IO = IOmax 5 mV
Load regulation VI = 53 V, IO = 0.01...1 x IOmax 5 mV
Vtr
Load transient
voltage deviation
IO = 0.1...1 x IOmax , VI = 53 V
Load step = 0.5 x IOmax di/dt = 1A/µs ±300 mV
ttr Load transient recovery time IO = 0.1...1 x IOmax , VI = 53
loadstep = 0.5x IOmax
100 µs
trRamp-up time IO = 0.1...0.9 x VO15 30 ms
tsStart-up time From VI connected to VO = 0.9 x VOI 20 40 ms
IOOutput current 0 25 A
POmax Max output power At VO = VOnom 82.5 W
Ilim Current limit threshold TPcb < TPcbmax 29 A
Isc Short circuit current TPcb = 25 °C 33 A
VOac Output ripple & noise See ripple and noise, IO = IOmax 120 150 mVp-p
SVR Supply voltage rejection (ac) f = 100 Hz sinewave , 1 Vp-p , VI = 53 V 80 dB
OVP Over voltage protection VI = 53 V 3.9 4.4 5.0 V
TPcb = –30…+90°C, VI = 36 ...75V, sense pins connected to output pins unless otherwise specified.
PKJ 4810E PI Output
Miscellaneous
Characteristics Conditions min typ max Unit
ηEfficiency - 50% load TPcb = +25 °C, VI = 48 V, IO = 0.5 x IOmax TBD %
ηEfficiency - 100% load TPcb = +25 °C, VI = 48 V, IO = IOmax TBD %
ηEfficiency - 50% load TPcb = +25 °C, VI = 53 V, IO = 0.5 x IOmax 93 %
ηEfficiency - 100% load TPcb = +25 °C, VI = 53 V, IO = IOmax 87 89 %
PdPower Dissipation TPcb = +25 °C, VI = 53 V, IO = IOmax 10 W
fsSwitching frequency IO = 0 ... 1.0 x IOmax 140 kHz
IImax Maximum input current 1.1 x VOi x IOmax / η / VImin 2.8 A
14 PKJ 4000E PI EN/LZT 146 025 R8A © Ericsson Power Modules, June 2007
PKJ 4810E PI Typical Characteristics
Efficiency
Efficiency vs. load current and input voltage at TPcb=+25 °C
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Output Current Derating
Available load current vs. ambient air temperature and airflow
at Vin=53 V. DC/DC converter mounted vertically with airflow
and test conditions as per the Thermal consideration section.
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Output Characteristic
Output voltage vs. load current at TPcb=+25 °C, Vin=53 V.
05 10 15 20 25
3.1
3.2
3.3
3.4
3.5
[A]
[V]
Power Dissipation
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Dissipated power vs. load current and input voltage at
TPcb=+25 °C
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Thermal resistance vs. airspeed measured at the converter.
Tested in windtunnel with airflow and test conditions as per
the Thermal consideration section. consideration section.
Thermal Resistance
15
PKJ 4000E PI EN/LZT 146 025 R8A © Ericsson Power Modules, June 2007
Start-Up
Start-up at Io=25A resistive load at TPcb=+25 °C,
Vin=53 V. Start enabled by connecting Vin. Top trace:
input voltage (10 V/div.). Bottom trace: output voltage
(1 V/div.). Time scale: 5 ms/div.
Turn-Off
Turn-off at Io=25A resistive load at TPcb=+25 °C,
Vin=53 V. Turn-off enabled by disconnecting Vin. Top
trace: output voltage (1 V/div.). Bottom trace: input
voltage (20 V/div.). Time scale: 10 ms/div.
PKJ 4810E PI Typical Characteristics
Output Ripple Transient
Output voltage ripple (100mV/div.) at TPcb=+25 °C, Vin=53 V,
Io=25A resistive load with C=10 µF tantalum and 0.1 µF
ceramic capacitors. Band width=20MHz. Time scale: 2µs / div.
Output voltage response to load current step-change
(6.25-18.75-6.25 A) at TPcb=+25 °C, Vin=53 V. Top
trace: output voltage (200mV/div.). Bottom trace:
load current (5 A/div.) Time scale: 0.1 ms/div.
Output Voltage Adjust
Output voltage adjust resistor value vs.
percentage change in output voltage.
1
10
100
1000
10000
100000
0 2 4 6 8 10 12 14 16 18 20 22
Decrease
Increase
[kOhm]
[%]
Output Voltage Adjust
The resistor value for an adjusted output voltage is
calculated by using the following equations:
Output Voltage Adjust Upwards, Increase:
Radj= [3.3(100+Δ%) / 1.225Δ%- (100+2Δ%) /Δ% ] kOhm
Output Voltage Adjust Downwards, Decrease:
Radj= [(100 / Δ%-2) ] kOhm
Eg Increase 4% =>Vout = 3.432 Vdc
3.3 (100+4)/1.225x4-100+2x4/4=43.04 kOhm
Eg Decrease 2% =>Vout = 3.234 Vdc
100/2-2=48.00 kOhm
16 PKJ 4000E PI EN/LZT 146 025 R8A © Ericsson Power Modules, June 2007
Characteristics Conditions
Output Unit
min typ max
VOi
Output voltage initial setting
and accuracy TPcb = +25 °C, VI = 53 V, IO = IOmax 4.96 5.00 5.04 V
Output adjust range IO = IOmax 4.00 5.50 V
VO
Output voltage tolerance band IO = 0.1...1 x IOmax 4.94 5.06 V
Idling voltage IO = 0 4.94 5.06 V
Line regulation IO = IOmax 5 mV
Load regulation VI = 53 V, IO = 0.01...1 x IOmax 5 mV
Vtr
Load transient
voltage deviation
IO = 0.1...1 x IOmax , VI = 53 V
Load step = 0.5 x IOmax di/dt = 1A/µs ±300 mV
ttr Load transient recovery time IO = 0.1...1 x IOmax , VI = 53
loadstep = 0.5x IOmax
100 µs
trRamp-up time IO = 0.1...0.9 x VO15 30 ms
tsStart-up time From VI connected to VO = 0.9 x VOI 20 40 ms
IOOutput current 0 20 A
POmax Max output power At VO = VOnom 100 W
Ilim Current limit threshold TPcb < TPcbmax 23 A
Isc Short circuit current TPcb = 25 °C 27 A
VOac Output ripple & noise See ripple and noise, IO = IOmax 110 150 mVp-p
SVR Supply voltage rejection (ac) f = 100 Hz sinewave , 1 Vp-p , VI = 53 V 70 dB
OVP Over voltage protection VI = 53 V 6.0 7.5 V
TPcb = –30…+90°C, VI = 36 ...75V, sense pins connected to output pins unless otherwise specified.
PKJ 4111E PI Output
Miscellaneous
Characteristics Conditions min typ max Unit
ηEfficiency - 50% load TPcb = +25 °C, VI = 48 V, IO = 0.5 x IOmax 92.5 %
ηEfficiency - 100% load TPcb = +25 °C, VI = 48 V, IO = IOmax 90 %
ηEfficiency - 50% load TPcb = +25 °C, VI = 53 V, IO = 0.5 x IOmax 92 %
ηEfficiency - 100% load TPcb = +25 °C, VI = 53 V, IO = IOmax 87 89 %
PdPower Dissipation TPcb = +25 °C, VI = 53 V, IO = IOmax 12 W
fsSwitching frequency IO = 0 ... 1.0 x IOmax 140 kHz
IImax Maximum input current 1.1 x VOi x IOmax / η / VImin 3.4 A
17
PKJ 4000E PI EN/LZT 146 025 R8A © Ericsson Power Modules, June 2007
Efficiency Output Current Derating
PKJ 4111E PI Typical Characteristics
Available load current vs. ambient air temperature and airflow
at Vin=53 V. DC/DC converter mounted vertically with airflow
and test conditions as per the Thermal consideration section.
Efficiency vs. load current and input voltage at Tpcb=+25 °C
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Output voltage vs. load current at TPcb=+25 °C, Vin=53 V.
05 10 15 20
4.8
4.9
5.0
5.1
5.2
[A]
[V]
Power Dissipation
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Dissipated power vs. load current and input voltage at
TPcb=+25 °C
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Thermal resistance vs. airspeed measured at the converter.
Tested in windtunnel with airflow and test conditions as per
the Thermal consideration section. consideration section.
Thermal Resistance
18 PKJ 4000E PI EN/LZT 146 025 R8A © Ericsson Power Modules, June 2007
PKJ 4111E PI Typical Characteristics
Output Ripple Transient
Output voltage ripple (100mV/div.) at TPcb=+25 °C, Vin=53 V,
Io=20A resistive load with C=10 µF tantalum and 0.1 µF
ceramic capacitors. Band width=20MHz. Time scale: 2µs / div.
Output voltage response to load current step-change
(5.0-15-5.0 A) at TPcb=+25 °C, Vin=53 V. Top trace:
output voltage (200mV/div.). Bottom trace:
load current (5 A/div.) Time scale: 0.1 ms/div.
Output Voltage Adjust
Output voltage adjust resistor value vs.
percentage change in output voltage.
1
10
100
1000
10000
100000
0 2 4 6 8 10 12 14 16 18 20 22
Decrease
Increase
[kOhm]
[%]
Output Voltage Adjust
The resistor value for an adjusted output voltage is
calculated by using the following equations:
Output Voltage Adjust Upwards, Increase:
Radj= [5.0(100+Δ%) / 1.225Δ%- (100+2Δ%) /Δ% ] kOhm
Output Voltage Adjust Downwards, Decrease:
Radj= [(100 / Δ%-2) ] kOhm
Eg Increase 4% =>Vout = 5.200 Vdc
5.0 (100+4)/1.225x4-100+2x4/4=79.12 kOhm
Eg Decrease 2% =>Vout = 4.900 Vdc
100/2-2=48.00 kOhm
Start-Up
Start-up at Io=20A resistive load at TPcb=+25 °C,
Vin=53 V. Start enabled by connecting Vin. Top trace:
input voltage (10 V/div.). Bottom trace: output voltage
(1 V/div.). Time scale: 5 ms/div.
Turn-Off
Turn-off at Io=25A resistive load at TPcb=+25 °C,
Vin=53 V. Turn-off enabled by disconnecting Vin. Top
trace: output voltage (2 V/div.). Bottom trace: input
voltage (20 V/div.). Time scale: 10 ms/div.
19
PKJ 4000E PI EN/LZT 146 025 R8A © Ericsson Power Modules, June 2007
Characteristics Conditions
Output Unit
min typ max
VOi
Output voltage initial setting
and accuracy TPcb = +25 °C, VI = 53 V, IO = IOmax 11.88 12.0 12.12 V
Output adjust range IO = IOmax 9.60 13.20 V
VO
Output voltage tolerance band IO = 0.1...1 x IOmax 11.82 12.18 V
Idling voltage IO = 0 11.82 12.18 V
Line regulation IO = IOmax 10 mV
Load regulation VI = 53 V, IO = 0.01...1 x IOmax 10 mV
Vtr
Load transient
voltage deviation
IO = 0.1...1 x IOmax , VI = 53 V
Load step = 0.5 x IOmax di/dt = 1A/µs ±400 mV
ttr Load transient recovery time IO = 0.1...1 x IOmax , VI = 53
loadstep = 0.5x IOmax
100 µs
trRamp-up time IO = 0.1...0.9 x VO15 30 ms
tsStart-up time From VI connected to VO = 0.9 x VOI 20 40 ms
IOOutput current 0 8.33 A
POmax Max output power At VO = VOnom 100 W
Ilim Current limit threshold TPcb < TPcbmax 9.5 A
Isc Short circuit current TPcb = 25 °C 11.5 A
VOac Output ripple & noise See ripple and noise, IO = IOmax 100 150 mVp-p
SVR Supply voltage rejection (ac) f = 100 Hz sinewave , 1 Vp-p , VI = 53 V 60 dB
OVP Over voltage protection VI = 53 V 16 18 V
TPcb = –30…+90°C, VI = 36 ...75V, sense pins connected to output pins unless otherwise specified.
PKJ 4113E PI Output
Miscellaneous
Characteristics Conditions min typ max Unit
ηEfficiency - 50% load TPcb = +25 °C, VI = 48 V, IO = 0.5 x IOmax TBD %
ηEfficiency - 100% load TPcb = +25 °C, VI = 48 V, IO = IOmax TBD %
ηEfficiency - 50% load TPcb = +25 °C, VI = 53 V, IO = 0.5 x IOmax 92.5 %
ηEfficiency - 100% load TPcb = +25 °C, VI = 53 V, IO = IOmax 88 90 %
PdPower Dissipation TPcb = +25 °C, VI = 53 V, IO = IOmax 11.2 W
fsSwitching frequency IO = 0 ... 1.0 x IOmax 220 kHz
IImax Maximum input current 1.1 x VOi x IOmax / η / VImin 3.4 A
20 PKJ 4000E PI EN/LZT 146 025 R8A © Ericsson Power Modules, June 2007
Efficiency
Output Characteristic
Output Current Derating
Power Dissipation
PKJ 4113E PI Typical Characteristics
Output voltage vs. load current at TPcb=+25 °C, Vin=53 V.
Available load current vs. ambient air temperature and airflow
at Vin=53 V. DC/DC converter mounted vertically with airflow
and test conditions as per the Thermal consideration section.
Efficiency vs. load current and input voltage at Tpcb=+25 °C
0 1 2 3 4 5 6 7 8 9
70
75
80
85
90
95
[A]
[%]
36 V
48 V
53 V
75 V
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01 2 3 45 6 7 89
11.8
11.9
12.0
12.1
12.2
[A]
[V]
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Dissipated power vs. load current and input voltage at
TPcb=+25 °C
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Thermal resistance vs. airspeed measured at the converter.
Tested in windtunnel with airflow and test conditions as per
the Thermal consideration section. consideration section.
Thermal Resistance
21
PKJ 4000E PI EN/LZT 146 025 R8A © Ericsson Power Modules, June 2007
Start-Up Turn-Off
Start-up at Io=8.33A resistive load at TPcb=+25 °C,
Vin=53 V. Start enabled by connecting Vin. Top trace:
input voltage (10 V/div.). Bottom trace: output voltage
(5 V/div.). Time scale: 5 ms/div.
Turn-off at Io=8.33A resistive load at TPcb=+25 °C,
Vin=53 V. Turn-off enabled by disconnecting Vin. Top
trace: output voltage (5 V/div.). Bottom trace: input
voltage (20 V/div.). Time scale: 10 ms/div.
Output Ripple Transient
PKJ 4113E PI Typical Characteristics
Output voltage ripple (100mV/div.) at TPcb=+25 °C, Vin=53 V,
Io=8.33A resistive load with C=10 µF tantalum and 0.1 µF
ceramic capacitors. Band width=20MHz. Time scale: 1µs / div.
Output voltage response to load current step-change
(2.0-6.2-2.0 A) at TPcb=+25 °C, Vin=53 V. Top trace:
output voltage (200mV/div.). Bottom trace:
load current (2 A/div.) Time scale: 0.1 ms/div.
Output Voltage Adjust
Output voltage adjust resistor value vs.
percentage change in output voltage.
1
10
100
1000
10000
100000
0 2 4 6 8 10 12 14 16 18 20 22
Decrease
Increase
[kOhm]
[%]
Output Voltage Adjust
The resistor value for an adjusted output voltage is cal-
culated by using the following equations:
Output Voltage Adjust Upwards, Increase:
Radj= [12(100+Δ%) / 1.225Δ%- (100+2Δ%) /Δ% ] kOhm
Output Voltage Adjust Downwards, Decrease:
Radj= [(100 / Δ%-2) ] kOhm
Eg Increase 4% =>Vout = 12.48 Vdc
12 (100+4)/1.225x4-100+2x4/4=228 kOhm
Eg Decrease 2% =>Vout = 11.76 Vdc
100/2-2=48.00 kOhm
22 PKJ 4000E PI EN/LZT 146 025 R8A © Ericsson Power Modules, June 2007
Characteristics Conditions
Output Unit
min typ max
VOi
Output voltage initial setting
and accuracy TPcb = +25 °C, VI = 53 V, IO = IOmax 14.85 15.0 15.15 V
Output adjust range IO = IOmax 12.0 16.5 V
VO
Output voltage tolerance band IO = 0.1...1 x IOmax 14.77 15.23 V
Idling voltage IO = 0 14.77 15.23 V
Line regulation IO = IOmax 10 mV
Load regulation VI = 53 V, IO = 0.01...1 x IOmax 10 mV
Vtr
Load transient
voltage deviation
IO = 0.1...1 x IOmax , VI = 53 V
Load step = 0.5 x IOmax di/dt = 1A/µs ±350 mV
ttr Load transient recovery time IO = 0.1...1 x IOmax , VI = 53
loadstep = 0.5x IOmax
100 µs
trRamp-up time IO = 0.1...0.9 x VO15 30 ms
tsStart-up time From VI connected to VO = 0.9 x VOI 20 40 ms
IOOutput current 0 6.67 A
POmax Max output power At VO = VOnom 100 W
Ilim Current limit threshold TPcb < TPcbmax 7.5 A
Isc Short circuit current TPcb = 25 °C 10.5 A
VOac Output ripple & noise See ripple and noise, IO = IOmax 110 150 mVp-p
SVR Supply voltage rejection (ac) f = 100 Hz sinewave , 1 Vp-p , VI = 53 V 65 dB
OVP Over voltage protection VI = 53 V 21 23 V
TPcb = –30…+90°C, VI = 36 ...75V, sense pins connected to output pins unless otherwise specified.
PKJ 4115E PI Output
Miscellaneous
Characteristics Conditions min typ max Unit
ηEfficiency - 50% load TPcb = +25 °C, VI = 48 V, IO = 0.5 x IOmax 91.0 %
ηEfficiency - 100% load TPcb = +25 °C, VI = 48 V, IO = IOmax 91.6 %
ηEfficiency - 50% load TPcb = +25 °C, VI = 53 V, IO = 0.5 x IOmax 90.2 %
ηEfficiency - 100% load TPcb = +25 °C, VI = 53 V, IO = IOmax 89 91.2 %
PdPower Dissipation TPcb = +25 °C, VI = 53 V, IO = IOmax 9.5 W
fsSwitching frequency IO = 0 ... 1.0 x IOmax 220 kHz
IImax Maximum input current 1.1 x VOi x IOmax / η / VImin 3.3 A
23
PKJ 4000E PI EN/LZT 146 025 R8A © Ericsson Power Modules, June 2007
PKJ 4115E PI Typical Characteristics
Efficiency
Efficiency vs. load current and input voltage at Tpcb=+25 °C
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Output Current Derating
Available load current vs. ambient air temperature and airflow at
Vin=53 V. DC/DC converter mounted vertically with airflow and
test conditions as per the Thermal consideration section.
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Output Characteristic
Output voltage vs. load current at TPcb=+25 °C, Vin=53 V.
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Dissipated power vs. load current and input voltage at
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Thermal resistance vs. airspeed measured at the converter.
Tested in windtunnel with airflow and test conditions as per
the Thermal consideration section. consideration section.
Thermal Resistance
24 PKJ 4000E PI EN/LZT 146 025 R8A © Ericsson Power Modules, June 2007
PKJ 4115E PI Typical Characteristics
Output Ripple Transient
Output voltage ripple (50mV/div.) at TPcb=+25 °C, Vin=53 V,
Io=6.67A resistive load with C=10 µF tantalum and 0.1 µF
ceramic capacitors. Band width=20MHz. Time scale: 1µs / div.
Output voltage response to load current step-change
(1.7-5.0-1.7 A) at TPcb=+25 °C, Vin=53 V. Top trace:
output voltage (200mV/div.). Bottom trace:
load current (2 A/div.) Time scale: 0.1 ms/div.
Output Voltage Adjust
Output voltage adjust resistor value vs.
percentage change in output voltage.
1
10
100
1000
10000
100000
0 2 4 6 8 10 12 14 16 18 20 22
Decrease
Increase
[kOhm]
[%]
Output Voltage Adjust
The resistor value for an adjusted output voltage is
calculated by using the following equations:
Output Voltage Adjust Upwards, Increase:
Radj= [15(100+Δ%) / 1.225Δ%- (100+2Δ%) /Δ% ] kOhm
Output Voltage Adjust Downwards, Decrease:
Radj= [(100 / Δ%-2) ] kOhm
Eg Increase 4% =>Vout = 15.60 Vdc
15 (100+4)/1.225x4-100+2x4/4=291 kOhm
Eg Decrease 2% =>Vout = 14.70 Vdc
100/2-2=48.00 kOhm
Start-Up
Start-up at Io=6.67A resistive load at TPcb=+25 °C,
Vin=53 V. Start enabled by connecting Vin. Top trace:
input voltage (10 V/div.). Bottom trace: output voltage
(5 V/div.). Time scale: 5 ms/div.
Turn-Off
Turn-off at Io=6.67A resistive load at TPcb=+25 °C,
Vin=53 V. Turn-off enabled by disconnecting Vin. Top
trace: output voltage (5 V/div.). Bottom trace: input
voltage (20 V/div.). Time scale: 10 ms/div.
25
PKJ 4000E PI EN/LZT 146 025 R8A © Ericsson Power Modules, June 2007
EMC Specification
The conducted EMI measurement was performed using a
module placed directly on the test bench.
The fundamental switching frequency is 140kHz for PKJ
4810E PI @ VI = 53V, IO = (0.1...1.0) × IOmax.
External filter (class B)
Required external input filter in order to meet class B in
EN 55022, CISPR 22 and FCC part 15J.
The capacitors are ceramic type. Low ESR is critical for
achieveing these results.
Test set-up.
PKJ 4810E PI with filter.
DC
Power
Source
+
-
5µH 50Ω
5µH 50Ω
LISN
LISN
in
in out
out
rcvr
rcvr
50 ohm input
1 m Twisted Pair
50 ohm temination
Optional Connection
to Earth Ground
Filter
(if used)
Power Module
Resistive
Load
Printed Circuit Board
EMC
Reciver Computer
Conducted EMI Input terminal value (typ)
PKJ 4810E PI without filter.
C1,2,6: 0.68uF
C3,7: 47uF
C4,5: 3.9nF
L1: Common mode inductor
on 768 uH (Pulse PO 422)
L2: DC choke: 15uH
C1 C2 C3 C6 C7
C5
C4
Layout Recommendation
The radiated EMI performance of the DC/DC converter will
be optimised by including a ground plane in the PCB area
under the DC/DC converter. This approach will return switch-
ing noise to ground as directly as possible, with improve-
ments to both emissions and susceptibility. If one ground
trace is used, it should be connected to the input return.
Alternatively, two ground traces may be used, with the trace
under the input side of the DC/DC converter connected to
the input return and the trace under the output side of the
DC/DC converter connected to the output return. Make sure
to use appropriate safety isolation spacing between these
two return traces. The use of two traces as described will
provide the capability of routing the input noise and output
noise back to their respective returns.
BNC
Connector
to Scope
Ceramic
Capacitor
+Vout
+Sense
Trim
-Sense
-Vout
Load
Tantalum
Capacitor
* Conductor from Vout to capacitors = 50mm [1.97in]
+
0.1uF 10uF
Output ripple and noise test setup
Output ripple and noise
The circuit below has been used for the ripple and noise
measurements on the PKJ 4000E Series DC/DC converters.
26 PKJ 4000E PI EN/LZT 146 025 R8A © Ericsson Power Modules, June 2007
Operating Information
Input Voltage
The input voltage range 36…75Vdc meets the requirements
of the European Telecom Standard ETS 300 132-2 for
normal input voltage range in –48V and –60V DC systems,
-40.5…-57.0V and –50.0…-72V respectively. At input
voltages exceeding 75V, the power loss will be higher than
at normal input voltage and TPcb must be limited to absolute
max +125°C. The absolute maximum continuous input
voltage is 80Vdc.
Turn-Off Input Voltage
The PKJ 4000E Series DC/DC converters monitor the input
voltage and will turn on and turn off at predetermined levels.
The minimum hysteresis between turn on and turn off input
voltage is 1V where the turn on input voltage is the highest.
Output Voltage Adjust (Vadj)
All PKJ 4000E Series DC/DC converters have an Output
Voltage adjust pin (Vadj). This pin can be used to adjust the
output voltage above or below Output voltage initial setting.
When increasing the output voltage, the voltage at the output
pins (including any remote sense offset) must be kept below
the overvoltage trip point, to prevent the converter from
shut down. Also note that at increased output voltages the
maximum power rating of the converter remains the same,
and the output current capability will decrease correspond-
ingly. To decrease the output voltage the resistor should be
connected between Vadj pin and –Sense pin. To increase
the voltage the resistor should be connected between Vadj
pin and +Sense pin. The resistor value of the Output voltage
adjust function is according to information given under the
output section.
Remote Control (RC)
The PKJ 4000E Series DC/DC
converters have a remote control
function referenced to the primary
side (- In), with negative and positive
logic options available. The RC
function allows the converter to be
turned on/off by an external device
like a semiconductor or mechanical
switch. The RC pin has an internal
pull up resistor to + In. The needed maximum sink current
is 1mA. When the RC pin is left open, the voltage generated
on the RC pin is 3.5-6.0V. The maximum allowable leakage
current of the switch is 50µA.
The standard converter is provided with “negative logic”
remote control and the converter will be off until the RC
pin is connected to the - In. To turn on the converter the
voltage between RC pin and - In should be less than 1V.
To turn off the converter the RC pin should be left open, or
connected to a voltage higher than 4V referenced to - In. In
situations where it is desired to have the converter to power
up automatically without the need for control signals or a
switch, the RC pin can be wired directly to - In.
The second option is “positive logic” remote control, which
can be ordered by adding the suffix “P” to the end of the
part number. The converter will turn on when the input
voltage is applied with the RC pin open. Turn off is achieved
by connecting the RC pin to the - In. To ensure safe turn
off the voltage difference between RC pin and the - In pin
shall be less than 1V. The converter will restart automatically
when this connection is opened.
All PKJ 4000E Series DC/DC converters have remote sense
that can be used to compensate for moderate amounts of re-
sistance in the distribution system and allow for voltage reg-
ulation at the load or other selected point. The remote sense
lines will carry very little current and do not need a large
cross sectional area. However, the sense lines on the PCB
should be located close to a ground trace or ground plane.
In a discrete wiring situation, the use of twisted pair wires
or other technique to reduce noise susceptibility is highly
recommended. The remote sense circuitry will compensate
for up to 10% voltage drop between the sense voltage and
the voltage at the output pins. The output voltage and the
remote sense voltage offset must be less than the minimum
over voltage trip point. If the remote sense is not needed the
–Sense should be connected to –Out and +Sense should be
connected to +Out.
Remote Sense
Circuit configuration for output voltage adjust
+Out
-Out
+Sense
Vadj
-Sense
Load
Radj
Radj
Decrease
Load
Increase
+Out
-Out
+Sense
Vadj
-Sense
Circuit configuration
for RC function
+In
RC
-In
27
PKJ 4000E PI EN/LZT 146 025 R8A © Ericsson Power Modules, June 2007
Operating Information
Over Temperature Protection (OTP)
The PKJ 4000E Series DC/DC converters are protected from
thermal overload by an internal over temperature shutdown
circuit. When the PCB temperature (centre of PCB ) exceeds
135 °C the converter will shut down immediately (latching).
The converter can be restarted by cycling the input voltage
or using the remote control function.
Input And Output Impedance
The impedance of both the power source and the load will
interact with the impedance of the DC/DC converter. It is
most important to have a ratio between L and C as low
as possible, i.e. a low characteristic impedance, both at
the input and output, as the converters have a low energy
storage capability. The PKJ 4000E Series DC/DC converters
have been designed to be completely stable without the
need for external capacitors on the input or the output
circuits. The performance in some applications can be
enhanced by addition of external capacitance as described
under maximum capacitive load. If the distribution of the
input voltage source to the converter contains significant
inductance, the addition of a 100µF capacitor across the
input of the converter will help insure stability. This capacitor
is not required when powering the DC/DC converter from
a low impedance source with short, low inductance, input
power leads.
Parallel Operation
The PKJ 4000E Series DC/DC converters can be paralleled
for redundancy if external "O"-ring diodes are used in series
with the outputs. It is not recommended to parallel the PKJ
4000E Series DC/DC converters for increased power without
using external current sharing circuits.
Maximum Capacitive Load
When powering loads with significant dynamic current
requirements, the voltage regulation at the load can be
improved by addition of decoupling capacitance at the
load. The most affective technique is to locate low ESR
ceramic capacitors as close to the load as possible, using
several capacitors to lower the effective ESR. These
ceramic capacitors will handle short duration high-frequency
components of dynamic load changes. In addition, higher
values of electrolytic capacitors should be used to handle
the mid-frequency components. It is equally important
to use good design practise when configuring the DC
distribution system.
Low resistance and low inductance PCB (printed circuit
board) layouts and cabling should be used. Remember that
when using remote sensing, all resistance, inductance and
capacitance of the distribution system is within the feedback
loop of the converter. This can affect on the converters
compensation and the resulting stability and dynamic
response performance. As a “rule of thumb”, 100 µF/A of
output current can be used without any additional analysis.
For example with a 25A converter, values of decoupling
capacitance up to 2500 µF can be used without regard to
stability. With larger values of capacitance, the load transient
recovery time can exceed the specified value. As much of
the capacitance as possible should be outside the remote
sensing loop and close to the load. The absolute maximum
value of output capacitance is 10 000 µF. For values larger
than this, please contact your local Ericsson Power Modules
representative.
Current Limit Protection
The PKJ 4000E Series DC/DC converters include current
limiting circuitry that allows them to withstand continuous
overloads or short circuit conditions on the output. The out-
put voltage will decrease towards zero for output currents in
excess of max output current (Iomax).
The converter will resume normal operation after removal
of the overload. The load distribution system should be
designed to carry the maximum output short circuit current
specified.
Over Voltage Protection (OVP)
The PKJ 4000E Series DC/DC converters have latching
output overvoltage protection. In the event of an overvolt-
age condition, the converter will shut down immediately. The
converter can be restarted by cycling the input voltage or
using the remote control function.
28 PKJ 4000E PI EN/LZT 146 025 R8A © Ericsson Power Modules, June 2007
Thermal Consideration
Position Device Tcritical Recommended Max Value
P1 FR4 PWB Tsurface 125ºC
P2 Transformer Tcore 125ºC
P2
P1 Airflow
Airflow
General
The PKJ 4000E Series DC/DC converters are designed
to operate in a variety of thermal environments, however
sufficient cooling should be provided to help ensure reliable
operation. Heat is removed by conduction, convection and
radiation to the surrounding environment. Increased airflow
enhances the heat transfer via convection. The available
load current vs. ambient air temperature and airflow at
Vin=53 V for each model is according to the information
given under the output section. The test is done in a wind
tunnel with a cross section of 305x305mm, the DC/DC
converter vertically mounted on a 8 layer PCB with a size
of 254x254mm. Each layer with 35 µm (1oz) copper. Proper
cooling can be verified by measuring the temperature of
selected devices. Peak temperature can occur at position
P1 and P2. The temperature at these positions should not
exceed the recommended max values.
Calculation of ambient temperature
By using the thermal resistance the maximum allowed
ambient temperature can be calculated.
1. The powerloss is calculated by using the formula
((1/η) - 1) × output power = power losses.
η = efficiency of converter. E.g 89% = 0.89
2. Find the value of the thermal resistance for each product in
the diagram by using the airflow speed at the output section
of the converter. Take the thermal resistance x powerloss to
get the temperature increase.
3. Max allowed calculated ambient temperature is: Max
TPCB of DC/DC converter – temperature increase.
B. 10.2W × 5.1°C/W = 52°C
C.125°C - 52°C = max ambient temperature is 73°C
The real temperature will be dependent on several factors,
like PCB size and type, direction of airflow, air turbulence
etc. It is recommended to verify the temperature by testing.
A. (( ) - 1) × 82.5W = 10.2W
1
0.89
E.g PKJ 4810E PI at 1m/s:
29
PKJ 4000E PI EN/LZT 146 025 R8A © Ericsson Power Modules, June 2007
Quality
Reliability
The Mean Time Between Failure (MTBF) of the PKJ 4000E
series DC/DC converter family is calculated to be greater
than (>) 7.6 million hours at full output power and a PCB
temperature of +110°C using the Ericsson failure rate data
system (TILDA/Preditool). The Ericsson failure rate data
system is based on field failure rates and is continuously
updated. The data corresponds to actual failure rates of
components used in Information Technology and Telecom
equipment in temperature controlled environments (TA=
-5...+65°C). The data is considered to have a confidence
level of 90%. For more information please refer to Design
Note 002.
Quality Statement
The PKJ 4000E series DC/DC converters are designed and
manufactured in an industrial environment where quality
systems and methods like ISO 9000, 6σ (sigma), and SPC
are intensively in use to boost the continuous improvements
strategy. Infant mortality or early failures in the products are
screened out and they are subjected to an ATE-based final
test. Conservative design rules, design reviews and product
qualifications, plus the high competence of an engaged work
force, contribute to the high quality of our products.
Warranty
Warranty period and conditions are defined in Ericsson
Power Modules General Terms and Conditions of Sale.
Delivery Package Information
PKJ 4000E series standard delivery package is a 50 pcs box
(One box contains 5 full trays and 1 empty hold down tray).
Tray Specification
Material: Polystyrene (PS)
Max surface resistance: 10 MOhm/sq
Color: Black
Capacity: 10 pcs/tray
Loaded tray stacking pitch: 15.3 mm
Weight: 133 g
Miscellaneous
The PKJ 4000E Series DC/DC converters are intended for
through hole mounting on a PCB. When wave soldering is
used max temperature on the pins are specified to 215°C for
10 seconds. Maximum preheat rate of 4°C/s is suggested.
When hand soldering is used a thermocouple needs to be
mounted on the DC/DC converter pins to verify that pin
temperatures does not exceed 215°C for longer time than 10
seconds with the used soldering tools.
No-clean flux is recommended to avoid entrapment of
cleaning fluids in cavities inside of the DC/DC power module.
The residues may affect long time reliability and isolation
voltage.
Compatibility with RoHS requirements
The products are compatible with the relevant clauses and
requirements of the RoHS directive 2002/95/EC and have a
maximum concentration value of 0.1% by weight in homoge-
neous materials for lead, mercury, hexavalent chromium, PBB
and PBDE and of 0.01% by weight in homogeneous materials
for cadmium.
Exemptions in the RoHS directive utilized in Ericsson Power
Modules products include:
- Lead in high melting temperature type solder (used to
solder the die in semiconductor packages)
- Lead in glass of electronics components and in electronic
ceramic parts (e.g. fill material in chip resistors)
- Lead as an alloying element in copper alloy containing up to
4% lead by weight (used in connection pins made of Brass)
Soldering Information
Limitation of Liability
Ericsson Power Modules does not make any other
warranties, expressed or implied including any warranty of
merchantability or fitness for a particular purpose (including,
but not limited to, use in life support applications, where
malfunctions of product can cause injury to a person's health
or life).
Information given in this data sheet is believed to be accurate and reliable.
No responsibility is assumed for the consequences of its use nor for any infringement
of patents or other rights of third parties which may result from its use.
No license is granted by implication or otherwise under any patent or patent rights of
Ericsson Power Modules. These products are sold only according to
Ericsson Power Modules’ general conditions of sale, unless otherwise confirmed in
writing. Specifications subject to change without notice.
Datasheet
The latest and most complete infor-
mation can be found on our website
Option Suffix Ordering No.
Positive Remote control logic P PKJ 4810E PIP
Pin length 3.6 mm (0.14 in) LA PKJ 4810E PILA
Note: As an example a positive logic, short pin
product would be PKJ 4810E PIPLA
Product Program
EN/LZT 146 025 R8A
© Ericsson Power Modules AB, June 2007
Product Options
The PKJE series DC/DC converter may be ordered with different options
listed in the Product Options Table.
Ericsson Power Modules Americas
SE-126 25 Stockholm, Sweden Ericsson Inc., Power Modules
Telephone: +46 8 568 69620 +1-972-583-5224, +1-972-583-6910
For local sales contacts, please refer to our website Asia/Pacific
www.ericsson.com/powermodules Ericsson Ltd.
or call: Int +46 8 568 69620, Fax: +46 8 568 69599 +852-2590-2453
For more information about the complete product program, please refer
to our website: www.ericsson.com/powermodules
VI
VO/IO max PO max Ordering No. Comment
Output 1
48/60 1.5 V/40 A 60 W PKJ 4618HE PI
48/60 1.8 V/36 A 65 W PKJ 4618GE PI
48/60 2.5 V/30 A 75.5 W PKJ 4719E PI
48/60 3.3 V/25 A 82.5 W PKJ 4810E PI
48/60 3.3 V/30 A 100 W PKJ 4110E PI See Technical Specification PKJ4110E PI
48/60 5 V/20 A 100 W PKJ 4111E PI
48/60 12 V/8.3 A 100 W PKJ 4113E PI
48/60 15 V/6.7 A 100 W PKJ 4115E PI
