36-75 Vdc DC/DC converter
Output up to 30 A/75 W
PKB 4000 Series
E
Contents
Product Program . . . . . . . . . . . . . . . . . . . . . .2
Mechanical Data . . . . . . . . . . . . . . . . . . . . . .2
Connections . . . . . . . . . . . . . . . . . . . . . . . . .2
Absolute Maximum Ratings . . . . . . . . . . . . .3
Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Product Qualifi cation Specifi cation . . . . . . . .4
Safety Specifi cation . . . . . . . . . . . . . . . . . . .5
PKB 4619 PINB - 2.5 V Data . . . . . . . . . . . .6
PKB 4610 PINB - 3.3 V Data . . . . . . . . . . . .9
PKB 4711 PINB - 5 V Data . . . . . . . . . . . . .12
PKB 4713 PINB - 12 V Data . . . . . . . . . . . .15
EMC Specifi cation . . . . . . . . . . . . . . . . . . . .18
Operating Information . . . . . . . . . . . . . . . . .19
Thermal Consideration . . . . . . . . . . . . . . . .21
Soldering Information . . . . . . . . . . . . . . . . .22
Delivery Package Information . . . . . . . . . . .22
Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Sales Offi ces and Contact Information . . . .23
Safety Approvals
Datasheet
Key Features
• Industry standard Eighth-brick
58 x 19.94 x 7.62 mm (2.28 x 0.785 x 0.30 in.)
• Low profi le, 7.62 mm (0.30 in.)
• High effi ciency, typ. 91 % at 2.5 Vout half load
• 2250 Vdc input to output isolation, meets isolation
requirements equivalent to basic insulation according
to IEC/EN/UL 60950
• More than 3.7 million hours predicted MTBF at 90 ˚C
Pcb temperature
The PKB 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 PKB 4000 series
has industry standard footprint and pin-out and is only
7.62 mm (0.30 in) high. This makes it extremely well
suited for narrow board pitch applications with board
spacing down to 15 mm (0.6 in). 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.
2EN/LZT 146 033 R1D ©Ericsson Power Modules, June 2004
PKB 4000 Datasheet
VIVO/IO max PO max Ordering No. Comment
Output 1
48/60
1.2 V/30 A 36 W PKB 4318 PIOBNB see Advanced Product Information
1.5 V/30 A 45 W PKB 4418 PIOANB see Advanced Product Information
1.8 V/25 A 45 W PKB 4418 PINB see Advanced Specifi cation
2.5 V/25 A 62.5 W PKB 4619 PINB
3.3 V/20 A 66 W PKB 4610 PINB
5.0 V/15 A 75 W PKB 4711 PINB
12 V/6 A 72 W PKB 4713 PINB
15 V/5 A 75 W PKB 4715 PINB see Advanced Product Information
Option Suffi x Example
Positive Remote Control logic P PKB 4619 PIPNB
Stand-off 1.25 mm (0.049 in)
Total height 8.7 mm (0.34 in) M PKB 4619 PINBM
Lead length 3.69 mm (0.145 in) LA PKB 4619 PINBLA
Lead length 4.57 mm (0.180 in) LB PKB 4619 PINBLB
Note: As an example a positive logic, increased stand-off, short pin product would be PKB 4619 PIPNBMLA
Product Program
57.9 [2.28]
50.8 [2.00]
7.6 [0.30]
5.3 [0.21]
19.94 [0.785]
15.24 [0.60]
11.43 [0.450]
7.62 [0.300]
Dimensions: mm [in.]
1.02 [0.040] DIA. pins typically 6 places
1.57 [0.060] DIA. pins typically 2 places
1
2
3
4
6
8
5
7
BOTTOM VIEW
Tolerances: .x ± 0.5 [ .xx ± 0.02]
.xx ± 0.25 [ .xxx ± 0.010]
Connections
Pin Designation Function
1 - In Negative input
2RC Remote control. To turn-on
and turn-off the converter
3 + In Positive input
4 - Out Negative output
5 - Sen Negative remote sense
6V
adj Output voltage adjust
7 + Sen Positive remote sense
8 + Out Positive output
Weight: (typ) 20g
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Mechanical Data
Pins:
Material: Brass alloy
Plating: Lead over nickel
M-option plating: Gold over nickel
3EN/LZT 146 033 R1D ©Ericsson Power Modules, June 2004
PKB 4000 Datasheet
Fundamental Circuit Diagram
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Absolute Maximum Ratings
Characteristics Conditions min typ max Unit
VIInput voltage range 36 75 Vdc
VIoff Turn-off input voltage Ramping from higher voltage 30 33.5 35 Vdc
VIon Turn-on input voltage Ramping from lower voltage 32 34.5 36 Vdc
CIInput capacitance 2.18 µF
IIac Refl ected ripple current 5 Hz to 20 MHz 10 mAp-p
PIi Input idling power Io= 0, VI = 53 V 1.6 W
PRC Input standby power (turned off with RC) VI = 53 V, RC activated 0.055 W
Input TPcb <TPcb max unless otherwise specifi ed
Characteristics min typ max Unit
Tpcb Maximum Operating Pcb Temperature -40 +110 ˚C
TSStorage temperature -55 +125 ˚C
VIInput voltage -0.5 +80 Vdc
VISO Isolation voltage (input to output test voltage) 2250 Vdc
Vtr Input voltage transient for 100 ms 100 Vdc
VRC Remote control (referenced to -In) -0.5 6 Vdc
Vadj Maximum input -0.5 2xVoi Vdc
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
unspecifi ed manner.
4EN/LZT 146 033 R1D ©Ericsson Power Modules, June 2004
PKB 4000 Datasheet
Characteristics
Random Vibration IEC 68-2-34EdFrequency
Spectral density
Duration
10 ... 500 Hz
0.025 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
5 g
10 in each axis
Shock
(half sinus) IEC 68-2-27 EaPeak acceleration
Duration 20 g
3 ms
Temperature change IEC 68-2-14 NaTemperature
Number of cycles -40 ... +100 ˚C
300
Heat/Humidity IEC 68-2-3 CaTemperature
Humidity
Duration
+85 ˚C
85 % RH
1000 hours
Solder heat stability IEC 68-2-20 Tb 1A Temperature, solder
Duration 260 ˚C
10 ...13 s
Resistance to cleaning solvents IEC 68-2-45 XA
Method 1
Water
Isopropyl alcohol
Method
+55 ±5 ˚C
+35 ±5 ˚C
with rubbing
Product Qualifi cation Specifi cation
5EN/LZT 146 033 R1D ©Ericsson Power Modules, June 2004
PKB 4000 Datasheet
Ericsson Power Modules DC/DC converters and DC/DC
regulators are designed in accordance with safety standards
IEC/EN/UL 60 950, Safety of Information Technology Equipment.
IEC/EN/UL60950 contains requirements to prevent injury or
damage due to the following hazards:
• Electrical shock
• Energy hazards
• Fire
• Mechanical and heat hazards
• Radiation hazards
• Chemical hazards
On-board DC-DC converters are defined as component power
supplies. As components they cannot fully comply with the
provisions of any Safety requirements without “Conditions of
Acceptability”. It is the responsibility of the installer to ensure
that the final product housing these components complies
with the requirements of all applicable Safety standards and
Directives for the final product.
Component power supplies for general use should comply
with the requirements in IEC60950, EN60950 and UL60950
“Safety of information technology equipment”.
There are other more product related standards, e.g.
IEC61204-7 “Safety standard for power supplies",
IEEE802.3af “Ethernet LAN/MAN Data terminal equipment
power”, and ETS300132-2 “Power supply interface at the
input to telecommunications equipment; part 2: DC”,
but all of these standards are based on IEC/EN/UL60950 with
regards to safety.
Ericsson Power Modules DC/DC converters and DC/DC
regulators are UL 60 950 recognized and certified in
accordance with EN 60 950.
The flammability rating for all construction parts of the
products meets UL 94V-0.
The products should be installed in the end-use equipment, in
accordance with the requirements of the ultimate application.
Normally the output of the DC/DC converter is considered as
SELV (Safety Extra Low Voltage) and the input source must be
isolated by minimum Double or Reinforced Insulation from
the primary circuit (AC mains) in accordance with
IEC/EN/UL 60 950.
Safety Specifi cation
Isolated DC/DC converters.
The input voltage to the DC/DC regulator is SELV (Safety
Extra Low Voltage) and the output remains SELV under normal
and abnormal operating conditions.
It is recommended that a slow blow fuse with a rating
twice the maximum input current per selected product
be used at the input of each DC/DC regulator.
Non-isolated DC/DC regulators.
24 V dc systems.
The input voltage to the DC/DC converter is SELV (Safety
Extra Low Voltage) and the output remains SELV under normal
and abnormal operating conditions.
48 and 60 V dc systems.
If the input voltage to Ericsson Power Modules 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
twice the maximum input current per selected product
be used at the input of each DC/DC converter. If an input filter
is used in the circuit the fuse should be placed in front of the
input filter.
In the rare event of a component problem in the input filter
or in the DC/DC 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 so as not to affect the operation of other parts of the
system.
• Protect the distribution wiring from excessive current and
power loss thus preventing hazardous overheating.
The galvanic isolation is verified in an electric strength test.
The test voltage (VISO) between input and output is 1500 Vdc
or 2250 Vdc for 60 seconds (refer to product specification).
Leakage current is less than 1µA at nominal input voltage.
General information.
6EN/LZT 146 033 R1D ©Ericsson Power Modules, June 2004
PKB 4000 Datasheet
Characteristics Conditions Output Unit
min typ max
VOi
Output voltage initial setting
and accuracy TPcb = +25 °C, VI = 53 V, IO = IOmax 2.45 2.50 2.55 V
Output adjust range IO = IOmax, VI = 53 V, TPcb = 25 ºC 2.00 2.75 V
VO
Output voltage tolerance band IO = 0.1...1 x IOmax 2.4 2.6 V
Idling voltage IO = 0 2.45 2.55 V
Line regulation IO = IOmax 5 10 mV
Load regulation VI = 53 V, IO = (0.01...1.0) x IOmax 5 10 mV
Vtr Load transient
voltage deviation IO = (0.1 ... 1.0) x IOmax, VI = 53 V
Load step = 0.5 x IOmax ±250 mV
ttr Load transient recovery time IO = (0.1...1.0) x IOmax, VI = 53 V
loadstep = 0.5 x IOmax 100 µs
trRamp-up time IO = (0.1...1.0) x IOmax, VI = 53 V 18 30 ms
tsStart-up time VI connection to 0.9 x VOi ,
IO = (0.1...1.0) x IOmax, VI = 53 V 35 60 ms
IOOutput current 0 25 A
POmax Max output power At VO = VOnom 62.5 W
Ilim Current limit threshold TPcb < TPcbmax 30 A
Isc Short circuit current TPcb = 25 ºC, VO < 0.5 V 33 A
VOac Output ripple & noise See ripple and noise, IOmax, VOnom 40 80 mVp-p
SVR Supply voltage rejection (ac) TPcb = +25 °C, VI = 53 V
f = 100Hz sinewave, 1 Vp-p 59 dB
OVP Over voltage protection VI = 53 V, IO = (0.1 ... 1.0) x IOmax,
TPcb = +25 °C. 2.9 4.5 V
ηEffi ciency - 50% load TPcb = +25 °C, VI = 48 V, IO = 0.5 x IOmax 91 %
ηEffi ciency - 100% load TPcb = +25 °C, VI = 48 V, IO = IOmax 88 %
ηEffi ciency - 50% load TPcb = +25 °C, VI = 53 V, IO = 0.5 x IOmax 91 %
ηEffi ciency - 100% load TPcb = +25 °C, VI = 53 V, IO = IOmax 87 88 %
PdPower Dissipation TPcb = +25 °C, VI = 53 V, IO = IOmax 8.5 W
fsSwitching frequency IO = 0 ... 1.0 x IOmax 160 kHz
TPcb = –40…+85°C, VI = 36...75V, sense pins connected to output pins unless otherwise specifi ed.
PKB 4619 PINB - 2.5 V Data
7EN/LZT 146 033 R1D ©Ericsson Power Modules, June 2004
PKB 4000 Datasheet
Effi ciency
Output Characteristic
Output Current Derating
Power Dissipation
PKB 4619 PINB - Typical Characteristics
Output voltage vs. load current at TPcb = +25 °C, VI = 53 V.
Available load current vs. ambient air temperature and air-
fl ow at VI = 53 V. DC/DC converter mounted vertically with
airfl ow blowing from output pins toward input pins.
Effi ciency vs. load current and input voltage at TPcb = +25 °C
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2.25
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Dissipated power vs. load current and input voltage at
TPcb = +25 °C
Thermal Resistance
Thermal resistance vs. airspeed measured at the converter.
Tested in windtunnel with airfl ow and test conditions as per
the Thermal consideration section.
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8EN/LZT 146 033 R1D ©Ericsson Power Modules, June 2004
PKB 4000 Datasheet
Output Ripple Transient
PKB 4619 PINB - Typical Characteristics
Output voltage ripple (20mV/div.) at TPcb = +25 °C, VI = 53 V,
IO = 25 A resistive load with C = 10 µF tantalum and 0.1 µF
ceramic capacitor.
Band width = 20 MHz. Time scale: 2 µs/div.
Output voltage response to load current step-change
(6-18-6 A) at TPcb=+25 °C, Vin=53 V.
Top trace: output voltage (100mV/div.).
Bottom trace: load current (6 A/div.)
Time scale: 0.1 ms/div.
Output Voltage Adjust
Output voltage adjust resistor value vs.
percentage change in output voltage.
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Output Voltage Adjust
The resistor value for an adjusted output voltage is calcu-
lated by using the following equations:
Output Voltage Adjust Upwards, Increase:
Radj= 5.11((2.5(100+∆%))/ 1.225∆%-(100+2∆%)/∆%) kOhm
Output Voltage Adjust Downwards, Decrease:
Radj= 5.11(100 / ∆%-2) kOhm
Eg Increase 4% =>Vout = 2.600 Vdc
5.11(2.5(100+4)/1.225x4-(100+2x4)/4) = 133.17 kOhm
Eg Decrease 2% =>Vout = 2.450 Vdc
5.11(100/2-2)= 245 kOhm
Start-Up Turn-Off
Start-up at IO = 25 A resistive load at TPcb = +25 °C,
VI = 53 V. Start enabled by connecting VI.
Trace B: input voltage (10 V/div.).
Trace A: output voltage (1 V/div.).
Time scale: 5 ms/div.
Turn-off at IO = 25 A resistive load at TPcb = +25 °C,
VI = 53 V. Turn-off enabled by disconnecting VI.
Trace: output voltage (1 V/div.).
Time scale: 0.2 ms/div.
9EN/LZT 146 033 R1D ©Ericsson Power Modules, June 2004
PKB 4000 Datasheet
Characteristics Conditions Output Unit
min typ max
VOi
Output voltage initial setting
and accuracy TPcb = +25 °C, VI = 53 V, IO = IOmax 3.23 3.30 3.37 V
Output adjust range IO = IOmax, VI = 53 V, TPcb = 25 ºC 2.64 2.63 V
VO
Output voltage tolerance band IO = 0.1...1 x IOmax 3.20 3.40 V
Idling voltage IO = 0 3.20 3.40 V
Line regulation IO = IOmax 3 10 mV
Load regulation VI = 53 V, IO = (0.01...1.0) x IOmax 3 10 mV
Vtr Load transient
voltage deviation IO = (0.1 ... 1.0) x IOmax, VI = 53 V
Load step = 0.5 x IOmax ±250 mV
ttr Load transient recovery time IO = (0.1...1.0) x IOmax, VI = 53 V
loadstep = 0.5 x IOmax 100 µs
trRamp-up time IO = (0.1...1.0) x IOmax, VI = 53 V 18 30 ms
tsStart-up time VI connection to 0.9 x VOi ,
IO = (0.1...1.0) x IOmax, VI = 53 V 35 60 ms
IOOutput current 0 20 A
POmax Max output power At VO = VOnom 66 W
Ilim Current limit threshold TPcb < TPcbmax 24 A
Isc Short circuit current TPcb = 25 ºC, VO < 0.5 V 28 A
VOac Output ripple & noise See ripple and noise, IOmax, VOnom 40 80 mVp-p
SVR Supply voltage rejection (ac) TPcb = +25 °C, VI = 53 V
f = 100Hz sinewave, 1 Vp-p 68 dB
OVP Over voltage protection VI = 53 V, IO = (0.1 ... 1.0) x IOmax,
TPcb = +25 °C. 3.7 4.7 V
ηEffi ciency - 50% load TPcb = +25 °C, VI = 48 V, IO = 0.5 x IOmax 91.5 %
ηEffi ciency - 100% load TPcb = +25 °C, VI = 48 V, IO = IOmax 89.5 %
ηEffi ciency - 50% load TPcb = +25 °C, VI = 53 V, IO = 0.5 x IOmax 90 %
ηEffi ciency - 100% load TPcb = +25 °C, VI = 53 V, IO = IOmax 88 89.5 %
PdPower Dissipation TPcb = +25 °C, VI = 53 V, IO = IOmax 7.7 W
fsSwitching frequency IO = 0 ... 1.0 x IOmax 160 kHz
TPcb = –40…+85°C, VI = 36...75V, sense pins connected to output pins unless otherwise specifi ed.
PKB 4610 PINB - 3.3 V Data
10 EN/LZT 146 033 R1D ©Ericsson Power Modules, June 2004
PKB 4000 Datasheet
Effi ciency
Output Characteristic
Output Current Derating
Power Dissipation
PKB 4610 PINB - Typical Characteristics
Output voltage vs. load current at TPcb = +25 °C, VI = 53 V.
Available load current vs. ambient air temperature and air-
fl ow at VI = 53 V. DC/DC converter mounted vertically with
airfl ow blowing from output pins toward input pins.
Effi ciency vs. load current and input voltage at TPcb = +25 °C
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Dissipated power vs. load current and input voltage at
TPcb = +25 °C
Thermal Resistance
Thermal resistance vs. airspeed measured at the converter.
Tested in windtunnel with airfl ow and test conditions as per
the Thermal consideration section.
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11 EN/LZT 146 033 R1D ©Ericsson Power Modules, June 2004
PKB 4000 Datasheet
Output Ripple Transient
PKB 4610 PINB - Typical Characteristics
Output voltage ripple (20mV/div.) at TPcb = +25 °C, VI = 53 V,
IO = 20 A resistive load with C = 10 µF tantalum and 0.1 µF
ceramic capacitor.
Band width = 20 MHz. Time scale: 2 µs/div.
Output voltage response to load current step-change
(5-15-5 A) at TPcb=+25 °C, Vin=53 V.
Top trace: output voltage (100mV/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.
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Output Voltage Adjust
The resistor value for an adjusted output voltage is calcu-
lated by using the following equations:
Output Voltage Adjust Upwards, Increase:
Radj= 5.11((3.3(100+∆%))/ 1.225∆%-(100+2∆%)/∆%) kOhm
Output Voltage Adjust Downwards, Decrease:
Radj= 5.11(100 / ∆%-2) kOhm
Eg Increase 4% =>Vout = 3.43 Vdc
5.11(3.3(100+4)/1.225x4-(100+2x4)/4) = 220 kOhm
Eg Decrease 2% =>Vout = 3.23 Vdc
5.11(100/2-2)= 245 kOhm
Start-Up Turn-Off
Start-up at IO = 20 A resistive load at TPcb = +25 °C,
VI = 53 V. Start enabled by connecting VI.
Trace 1: input voltage (10 V/div.).
Trace 2: output voltage (1 V/div.).
Time scale: 5 ms/div.
Turn-off at IO = 20 A resistive load at TPcb = +25 °C,
VI = 53 V. Turn-off enabled by disconnecting VI.
Trace: output voltage (0.1 V/div.).
Time scale: 1 ms/div.
12 EN/LZT 146 033 R1D ©Ericsson Power Modules, June 2004
PKB 4000 Datasheet
Characteristics Conditions Output Unit
min typ max
VOi
Output voltage initial setting
and accuracy TPcb = +25 °C, VI = 53 V, IO = IOmax 4.90 5.0 5.10 V
Output adjust range IO = IOmax, VI = 53 V, TPcb = 25 ºC 4.00 5.50 V
VO
Output voltage tolerance band IO = 0.1...1 x IOmax 4.85 5.15 V
Idling voltage IO = 0 4.85 5.15 V
Line regulation IO = IOmax 3 10 mV
Load regulation VI = 53 V, IO = (0.01...1.0) x IOmax 3 10 mV
Vtr Load transient
voltage deviation IO = (0.1 ... 1.0) x IOmax, VI = 53 V
Load step = 0.5 x IOmax ±250 mV
ttr Load transient recovery time IO = (0.1...1.0) x IOmax, VI = 53 V
loadstep = 0.5 x IOmax 50 µs
trRamp-up time IO = (0.1...1.0) x IOmax, VI = 53 V 18 30 ms
tsStart-up time VI connection to 0.9 x VOi ,
IO = (0.1...1.0) x IOmax, VI = 53 V 40 60 ms
IOOutput current 0 15 A
POmax Max output power At VO = VOnom 75 W
Ilim Current limit threshold TPcb < TPcbmax 17.5 A
Isc Short circuit current TPcb = 25 ºC, VO < 0.5 V 23 A
VOac Output ripple & noise See ripple and noise, IOmax, VOnom 30 80 mVp-p
SVR Supply voltage rejection (ac) TPcb = +25 °C, VI = 53 V
f = 100Hz sinewave, 1 Vp-p 65 dB
OVP Over voltage protection VI = 53 V, IO = (0.1 ... 1.0) x IOmax,
TPcb = +25 °C. 5.6 7.2 V
ηEffi ciency - 50% load TPcb = +25 °C, VI = 48 V, IO = 0.5 x IOmax 92 %
ηEffi ciency - 100% load TPcb = +25 °C, VI = 48 V, IO = IOmax 91.2 %
ηEffi ciency - 50% load TPcb = +25 °C, VI = 53 V, IO = 0.5 x IOmax 92 %
ηEffi ciency - 100% load TPcb = +25 °C, VI = 53 V, IO = IOmax 90 91.2 %
PdPower Dissipation TPcb = +25 °C, VI = 53 V, IO = IOmax 7.2 W
fsSwitching frequency IO = 0 ... 1.0 x IOmax 160 kHz
TPcb = –40 … +85 °C, VI = 38 ... 75 V, sense pins connected to output pins unless otherwise specifi ed.
PKB 4711 PINB - 5 V Data
13 EN/LZT 146 033 R1D ©Ericsson Power Modules, June 2004
PKB 4000 Datasheet
Effi ciency
Output Characteristic
Output Current Derating
Power Dissipation
PKB 4711 PINB - Typical Characteristics
Output voltage vs. load current at TPcb = +25 °C, VI = 53 V.
Available load current vs. ambient air temperature and air-
fl ow at VI = 53 V. DC/DC converter mounted vertically with
airfl ow blowing from output pins toward input pins.
Effi ciency vs. load current and input voltage at TPcb = +25 °C
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Dissipated power vs. load current and input voltage at
TPcb = +25 °C
Thermal Resistance
Thermal resistance vs. airspeed measured at the converter.
Tested in windtunnel with airfl ow and test conditions as per
the Thermal consideration section.
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14 EN/LZT 146 033 R1D ©Ericsson Power Modules, June 2004
PKB 4000 Datasheet
Output Ripple Transient
PKB 4711 PINB - Typical Characteristics
Output voltage ripple (20mV/div.) at TPcb = +25 °C, VI = 53 V,
IO = 15 A resistive load with C = 10 µF tantalum and 0.1 µF
ceramic capacitor.
Band width = 20 MHz. Time scale: 2 µs/div.
Output voltage response to load current step-change
(3.75-11.25-3.75 A) at TPcb=+25 °C, Vin=53 V.
Top trace: output voltage (100mV/div.).
Bottom trace: load current (3.75 A/div.)
Time scale: 0.1 ms/div.
Output Voltage Adjust
Output voltage adjust resistor value vs.
percentage change in output voltage.
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Output Voltage Adjust
The resistor value for an adjusted output voltage is calcu-
lated by using the following equations:
Output Voltage Adjust Upwards, Increase:
Radj= 5.11((5(100+∆%))/ 1.225∆%-(100+2∆%)/∆%) kOhm
Output Voltage Adjust Downwards, Decrease:
Radj= 5.11(100 / ∆%-2) kOhm
Eg Increase 4% =>Vout = 5.4 Vdc
5.11(5(100+4)/1.225x4-(100+2x4)/4) = 404 kOhm
Eg Decrease 2% =>Vout = 4.9 Vdc
5.11(100/2-2)= 245 kOhm
Start-Up Turn-Off
Start-up at IO = 15 A resistive load at TPcb = +25 °C,
VI = 53 V. Start enabled by connecting VI.
Trace A: input voltage (20 V/div.).
Trace B: output voltage (1 V/div.).
Time scale: 10 ms/div.
Turn-off at IO = 15 A resistive load at TPcb = +25 °C,
VI = 53 V. Turn-off enabled by disconnecting VI.
Trace: output voltage (1 V/div.).
Time scale: 0.1 ms/div.
15 EN/LZT 146 033 R1D ©Ericsson Power Modules, June 2004
PKB 4000 Datasheet
Characteristics Conditions Output Unit
min typ max
VOi
Output voltage initial setting
and accuracy TPcb = +25 °C, VI = 53 V, IO = IOmax 11.8 12 12.2 V
Output adjust range IO = IOmax, VI = 53 V, TPcb = 25 ºC 9.6 13.2 V
VO
Output voltage tolerance band IO = 0.1...1 x IOmax 11.75 12.25 V
Idling voltage IO = 0 11.75 12.25 V
Line regulation IO = IOmax 3 10 mV
Load regulation VI = 53 V, IO = (0.01...1.0) x IOmax 3 10 mV
Vtr Load transient
voltage deviation IO = (0.1 ... 1.0) x IOmax, VI = 53 V
Load step = 0.5 x IOmax ±250 mV
ttr Load transient recovery time IO = (0.1...1.0) x IOmax, VI = 53 V
loadstep = 0.5 x IOmax 100 µs
trRamp-up time IO = (0.1...1.0) x IOmax, VI = 53 V 18 30 ms
tsStart-up time VI connection to 0.9 x VOi ,
IO = (0.1...1.0) x IOmax, VI = 53 V 35 60 ms
IOOutput current 0 6 A
POmax Max output power At VO = VOnom 72 W
Ilim Current limit threshold TPcb < TPcbmax 8 A
Isc Short circuit current TPcb = 25 ºC, VO < 0.5 V 9 A
VOac Output ripple & noise See ripple and noise, IOmax, VOnom 50 100 mVp-p
SVR Supply voltage rejection (ac) TPcb = +25 °C, VI = 53 V
f = 100Hz sinewave, 1 Vp-p 36 dB
OVP Over voltage protection VI = 53 V, IO = (0.1 ... 1.0) x IOmax,
TPcb = +25 °C. 14 16 V
ηEffi ciency - 50% load TPcb = +25 °C, VI = 48 V, IO = 0.5 x IOmax 92 %
ηEffi ciency - 100% load TPcb = +25 °C, VI = 48 V, IO = IOmax 92 %
ηEffi ciency - 50% load TPcb = +25 °C, VI = 53 V, IO = 0.5 x IOmax 92 %
ηEffi ciency - 100% load TPcb = +25 °C, VI = 53 V, IO = IOmax 90 92 %
PdPower Dissipation TPcb = +25 °C, VI = 53 V, IO = IOmax 6.3 W
fsSwitching frequency IO = 0 ... 1.0 x IOmax 160 kHz
TPcb = –40…+85°C, VI = 36...75V, sense pins connected to output pins unless otherwise specifi ed.
PKB 4713 PINB - 12 V Data
16 EN/LZT 146 033 R1D ©Ericsson Power Modules, June 2004
PKB 4000 Datasheet
Effi ciency
Output Characteristic
Output Current Derating
Power Dissipation
PKB 4713 PINB - Typical Characteristics
Output voltage vs. load current at TPcb = +25 °C, VI = 53 V.
Available load current vs. ambient air temperature and air-
fl ow at VI = 53 V. DC/DC converter mounted vertically with
airfl ow blowing from output pins toward input pins.
Effi ciency vs. load current and input voltage at TPcb = +25 °C
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Dissipated power vs. load current and input voltage at
TPcb = +25 °C
Thermal Resistance
Thermal resistance vs. airspeed measured at the converter.
Tested in windtunnel with airfl ow and test conditions as per
the Thermal consideration section.
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17 EN/LZT 146 033 R1D ©Ericsson Power Modules, June 2004
PKB 4000 Datasheet
Output Ripple Transient
PKB 4713 PINB - Typical Characteristics
Output voltage ripple (20mV/div.) at TPcb = +25 °C, VI = 53 V,
IO = 6 A resistive load with C = 10 µF tantalum and 0.1 µF ce-
ramic capacitor.
Band width = 20 MHz. Time scale: 2 µs/div.
Output voltage response to load current step-change
(1.5-4.5-1.5 A) at TPcb=+25 °C, Vin=53 V.
Top trace: output voltage (100mV/div.).
Bottom trace: load current (1.5 A/div.)
Time scale: 0.1 ms/div.
Output Voltage Adjust
Output voltage adjust resistor value vs.
percentage change in output voltage.
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Output Voltage Adjust
The resistor value for an adjusted output voltage is calcu-
lated by using the following equations:
Output Voltage Adjust Upwards, Increase:
Radj= 5.11((12(100+∆%))/ 1.225∆%-(100+2∆%)/∆%) kOhm
Output Voltage Adjust Downwards, Decrease:
Radj= 5.11(100 / ∆%-2) kOhm
Eg Increase 4% =>Vout = 12.48 Vdc
5.11(12(100+4)/1.225x4-(100+2x4)/4) = 1164 kOhm
Eg Decrease 2% =>Vout = 11.76 Vdc
5.11(100/2-2)= 245 kOhm
Start-Up Turn-Off
Start-up at IO = 6 A resistive load at TPcb = +25 °C,
VI = 53 V. Start enabled by connecting VI.
Trace A: input voltage (20 V/div.).
Trace B: output voltage (5 V/div.).
Time scale: 10 ms/div.
Turn-off at IO = 6 A resistive load at TPcb = +25 °C,
VI = 53 V. Turn-off enabled by disconnecting VI.
Top trace: output voltage (5 V/div.).
Bottom trace: input voltage (20 V/div.).
Time scale: 0.2 ms/div.
18 EN/LZT 146 033 R1D ©Ericsson Power Modules, June 2004
PKB 4000 Datasheet
EMC Specifi cation
The conducted EMI measurement was performed using a
module placed directly on the test bench.
The fundamental switching frequency is 160kHz for
PKB 4610 PINB @ VI = 53V, IO = (0.1...1.0) x IOmax.
External fi lter (class B)
Required external input fi lter in order to meet class B in
EN 55022, CISPR 22 and FCC part 15J.
The capacitors used are of ceramic type.
Test set-up.
L2
768 µH
L1
5.6 µH
C6
3.9 nF
C3
47 µF
C4
0.68 µF
C2
0.68 µF
C1
47 µF
C7
3.9 nF
C5
0.68 µF
DC/DC
R
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 switching
noise to ground as directly as possible, with improvements 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.
100
90
80
70
60
50
40
30
20
10
0
0.15 1.0 10.0 30.0
MHz
22B_QP 22B_AV
dBµV
100
90
80
70
60
50
40
30
20
10
0
0.15 1.0 10.0 30.0
MHz
22B_QP 22B_AV
dBµV
PKB 4610 PINB without fi lter.
PKB 4610 PINB with fi lter.
Conducted EMI Input terminal value (typ)
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 meas-
urements on the PKB 4000 Series DC/DC converters.
19 EN/LZT 146 033 R1D ©Ericsson Power Modules, June 2004
PKB 4000 Datasheet
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
+110°C. The absolute maximum continuous input voltage
is 80Vdc.
Turn-Off Input Voltage
The PKB 4000 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 PKB 4000 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 correspondingly. 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)
All PKB 4000 Series DC/DC converters have remote sense that
can be used to compensate for moderate amounts of resistance
in the distribution system and allow for voltage regulation 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 confi guration for output voltage adjust
+Out
-Out
+Sense
Vadj
-Sense
Load
Radj
Radj
Decrease
Load
Increase
+Out
-Out
+Sense
Vadj
-Sense
The PKB 4000 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 12 - 15 V. The
maximum allowable leakage current of the switch is 20 µA.
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 13 V 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.
Circuit confi guration
for RC function
+In
RC
-In
20 EN/LZT 146 033 R1D ©Ericsson Power Modules, June 2004
PKB 4000 Datasheet
Operating Information
Over Temperature Protection (OTP)
The PKB 4000 Series DC/DC converters are protected from
thermal overload by an internal over temperature shutdown
circuit. When the PCB temperature on the topside between
the input capacitors and main transformer exceeds 120 °C
the converter will shut down immediately. The converter will
make continuous attempts to start up (non-latching mode) and
resume normal operation automatically when the temperature
has dropped below the temperature threshold.
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 low characteristic impedance, both at the
input and output, as the converters have a low energy storage
capability. The PKB 4000 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
100 µF 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 PKB 4000 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 PKB 4000 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 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”, 100µF/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 PKB 4000 Series DC/DC converters include current
limiting circuitry that allows them to withstand continuous
overloads or short circuit conditions on the output. The output
voltage will decrease towards zero for output currents in excess
of max output current (Iomax).
When the over-current condition remains for a longer time the
converter will enter a second mode of current limit protection,
whereby the converter shuts down and makes continuous at-
tempts to start up (non-latching mode).
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 PKB 4000 Series DC/DC converters have output over-
voltage protection. In the event of an overvoltage condition,
the converter will shut down immediately. The converter will
make continuous attempts to start up (non-latching mode) and
resume normal operation automatically.
21 EN/LZT 146 033 R1D ©Ericsson Power Modules, June 2004
PKB 4000 Datasheet
Thermal Consideration
General
The PKB 4000 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 305 x 305 mm, the DC/DC converter
vertically mounted on a 6 layer PCB with a size of 254 x 254
mm, each layer with 105 µm (3 oz) 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 this position should not exceed the
recommended max value.
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 = effi ciency of converter. E.g 88% = 0.88
2. Find the value of the thermal resistance for each product in
the diagram by using the airfl ow 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
T
PCB of DC/DC converter – temperature increase.
B. 8.52 W × 5.11 °C/W = 43.54 °C
C. 110 °C - 43.5 °C = max ambient temperature is 66.5 °C
The real temperature will be dependent on several factors,
like PCB size and type, direction of airfl ow, air turbulence
etc. It is recommended to verify the temperature by testing.
A. (( ) - 1) × 62.5W = 8.52 W
1
0.88
E.g PKB 4619 PI at 1m/s:
*OQVUTJEF
0VUQVUTJEF
1
"*3'-08
1
Position Device TCRecommended
max value
P1 mosfet Tsurface 120 °C
P2 mosfet Tsurface 110 °C
22 EN/LZT 146 033 R1D ©Ericsson Power Modules, June 2004
PKB 4000 Datasheet
Reliability
The Mean Time Between Failure (MTBF) of the PKB 4000 series
DC/DC converter family is calculated to be greater than (>) 3.7
million hours at full output power and a PCB temperature of
+90°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.
The PKB 4000 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.
Soldering Information
Delivery Package Information
PKB 4000 series standard delivery package is a 100 pcs box.
(one box contains 5 full clamshells)
Clamshell Specifi cation
Material: PET
Max surface resistance: 1012 Ohm/sq
Color: Transparent
Capacity: 20 pcs/clamshell
Weight: 135 g (typ)
Design for Environment (DfE)
The PKB 4000 series DC/DC converters are planned to comply
with the RoHS directive no later than december 31st, 2004
23 EN/LZT 146 033 R1D ©Ericsson Power Modules, June 2004
PKB 4000 Datasheet
Sales Offi ces and Contact Information
Company Headquarters
Ericsson Power Modules AB
LM Ericssons väg 8
SE-126 25 Stockholm
Sweden
Phone: +46-8-568-69620
Fax: +46-8-568-69599
China
Ericsson Simtek Electronics Co.
33 Fuhua Road
Jiading District
Shanghai 201 818
Phone: +86-21-5951-6258
Fax: +86-21-5951-6188
France, Switzerland, Benelux
Ericsson France
Power Modules
19 Avenue Carnot
92297 Massy, Cedex
Phone: +33-1-644-753-39
Fax: +33-1-644-759-47
North and South America
Ericsson Inc. Power Modules
6300 Legacy Dr.
Plano, TX 75024
Phone: +1-877-374-2642
Fax: +1-972-583-7839
Hong Kong (Asia Pacifi c)
Ericsson Ltd.
12/F. Devon House
979 King’s Road
Quarry Bay
Hong Kong
Phone: +852-2590-2453
Fax: +852-2590-7152
Italy, Spain (Mediterranean)
Ericsson Power Modules
Via Pio La Torre 14c
20090 Vimodrone (MI)
Italy
Phone: +39-02-265-946-07
Fax: +39-02-265-946-69
UK, Eire
Ericsson Ltd. Power Modules
Midleton Gate,
Guildford Business Park
Guildford, Surrey GU2 8SG
Phone: +44-1483-305-010
Fax: +44-1483-305-027
All other countries
Contact Company Headquarters
or visit our website:
www.ericsson.com/powermodules
Information given in this data sheet is believed to be accurate and reliable.
No re spon si bil i ty is assumed for the con se quenc es of its use nor for any infringement
of patents or other rights of third parties which may result from its use.
No license is grant ed by implication or otherwise under any patent or patent rights of
Ericsson Power Modules. These products are sold only ac cord ing to
Ericsson Power Modules’ general conditions of sale, unless oth er wise con fi rmed in
writing. Specifi cations subject to change without notice.