Technical
Specification
PQ60050QTA30
Product # PQ60050QTA30 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QT650C Rev. E 05/20/09 Page 1
The PQ60050QTA30 PowerQor® Tera quarter-brick
converter is a next-generation, board-mountable,
isolated, fixed switching frequency DC/DC converter
that uses synchronous rectification to achieve
extremely high conversion efficiency. The power
dissipated by the converter is so low that a heatsink
is not required, which saves cost, weight, height,
and application effort. All of the power and control
components are mounted to the multi-layer PCB
substrate with high-yield surface mount technology.
Since the PowerQor converter has no explicit thermal
interfaces, it is extremely reliable. The Tera series
offers the maximum useable output current for any
standard “quarter-brick” module. RoHS compliant
(see page 13).
48Vin 5.0Vout 30Amp 2000Vdc Quarter-brick
Input Output Current Isolation DC/DC Converter
• Ultra-highefficiency,>90%atfullratedloadcurrent
• Deliversupto30ampsofoutputcurrent(150W)with
minimal derating - no heatsink required
• Wideinputvoltagerange:35–75V,with100V100ms
input voltage transient capability
• FixedfrequencyswitchingprovidespredictableEMI
performance
• Nominimumloadrequirementmeansnopreload
resistors required
Operational Features
• Inputunder-voltagelockoutdisablesconverteratlow
input voltage conditions
• Outputcurrentlimitandshortcircuitprotection
protects converter and load from permanent damage
and consequent hazardous conditions
• Activebackbiaslimitpreventsdamagetoconverter
from external load induced pre-bias
• Outputover-voltageprotectionprotectsloadfrom
damaging voltages
• Thermalshutdownprotectsconverterfromabnormal
environmental conditions
Protection Features
• Industrystandardquarter-brickpin-outconfiguration
• Industrystandardsize:1.45”x2.3”(36.8x58.4mm)
• Totalheightlessthan0.43”(10.9mm),permitsbetter
airflow and smaller card pitch
• Totalweight:1.5oz.(42grams)
• Flangedpinsdesignedtopermitsurfacemount
soldering(avoidwavesolder)usingFPiPtechnique
Mechanical Features
• On/Offcontrolreferencedtoinputside(positiveand
negative logic options are available)
• Remotesensefortheoutputvoltagecompensatesfor
output distribution drops
• Outputvoltagetrimpermitscustomvoltagesand
voltage margining
Control Features
•2000V,30MΩinput-to-outputisolation
•UL60950-1:2003,basicinsulation
•CAN/CSA-C22.2No.60950-1:2003
•EN60950-1:2001
•RoHScompliant(seepage13)
Safety Features
PageNo.
MechanicalDiagram.......................................2
PQ60050QTD30ELECTRICALCHARACTERISTICS .................3-
STANDARDSCOMPLIANCE&QUALIFICATIONTESTING .............4
Figures ...............................................5-8
Application section......................................9-12
OrderingInformation .....................................13
Contents
PQ60050QTA30 Module
Product # PQ60050QTA30 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QT650C Rev. E 05/20/09 Page 2
Technical Specification
Input:
Output:
Current:
Package:
35-75 V
5.0 V
30 A
Quarter-brick
NOTES
1)Pins1-3,5-7are0.040”(1.02mm)diameterwith
0.080”(2.03mm)diameterstandoffshoulders.
2)Pins4and8are0.062”(1.57mm)diameterwith0.100”
(2.54mm)diameterstandoffshoulders.
3)Otherpinextensionlengthsavailable.
4)AllPins:Material-CopperAlloy
Finish-MatteTinoverNickelplate
5)Undimensionedcomponentsareshownforvisualreferenceonly.
6) All dimensions in inches (mm)
Tolerances: x.xx+/-0.02in.(x.x+/-0.5mm)
x.xxx+/-0.010in.(x.xx+/-0.25mm)
7)Weight:2.4oz.(68g)typical
8)Workmanship:MeetsorexceedsIPC-A-610CClassII
9)
UL/TUVstandardsrequireaclearancegreaterthan0.04”
(1.02mm)betweeninputandoutputforBasicinsulation.This
issue should be considered if any copper traces are on the top side
oftheuser’sboard.Notethattheferritecoresareconsideredpart
of the input/primary circuit.
10) The flanged pins are designed to permit surface mount soldering
(allowing to avoid the wave soldering process) through the use of the
flanged pin-in-paste technique.
PIN DESIGNATIONS
Mechanical Diagram
Pin
Name Function
1Vin(+)
Positive input voltage
2
ON/OFF TTL input to turn converter on and off,
referenced to Vin(-), with internal pull up.
3
Vin(-) Negative input voltage
4
Vout(-) Negative output voltage
5
SENSE(-) Negative remote sense see note 1
6
TRIM Output voltage trim see note 2
7
SENSE(+) Positive remote sense see note 3
8 Vout(+)
Positive output voltage
Top View
0.600
(15.24)
0.600
(15.24)
0.300
(7.62)
0.150
(3.81)
Side View
0.145
(3.68)
0.145
(3.68)
See
Note 3
2.00
(50.8)
2.30
(58.4)
.14
(3.6)
.43
(10.9)
.43
(10.9)
.300
(7.62)
PIN
FARSIDE
TYPICAL
SEE NOTES
1, 2, AND 4 BOTTOMSIDE
CLEARANCE
0.060 +.022/-.032
(1.52 +.55/-.81)
0.450
(11.43)
8765 4
1 2 3
1)SENSE(-)shouldbeconnectedtoVout(-)eitherremotelyorattheconverter
2)LeaveTRIMpinopenfornominaloutputvoltage.
3)SENSE(+)shouldbeconnectedtoVout(+)eitherremotelyorattheconverter
Product # PQ60050QTA30 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QT650C Rev. E 05/20/09 Page 3
Technical Specification
Input:
Output:
Current:
Package:
35-75 V
5.0 V
30 A
Quarter-brick
Parameter
Min. Typ. Max. Units Notes & Conditions
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Non-Operating 100 V Continuous
Operating 80 V Continuous
Operating Transient Protection
100 V
100
ms transient, square wave
Isolation Voltage (input to output) 2000 V Basic insulation, Pollution Degree 2
Operating Temperature -40 100
°C
Storage Temperature -55 125
°C
Voltage at ON/OFF input pin -2 18 V
INPUT CHARACTERISTICS
Operating Input Voltage Range 35 48 75 V
Input Under-Voltage Lockout
Turn-On Voltage Threshold 33 34 35 V
Turn-Off Voltage Threshold 30.5 31.5 32.5 V
Lockout Voltage Hysteresis 2.5 3.5 4.5 V
Maximum Input Current 5.5 A 100% Load, 35 Vin, trim up, in current limit
No-Load Input Current 70 120 mA
Disabled Input Current 1.6 3 mA
Inrush Current Transient Rating 0.01 A2s
Response to Input Transient 500 mV 1000V/ms input transient
Input Reflected Ripple Current 7 mA P-P thru 10
µH inductor; Figures 13 & 15
Input Terminal Ripple Current 185 mA RMS
; Figures 13 & 14
Recommended Input Fuse 7 A Fast blow external fuse recommended
Input Filter Component Values (L\C) 2.0\6.6
µH\µF Internal values; see Figure E
Recommended External Input Capacitance 47
µF Typical ESR 0.1-0.2
W
; see Figure 13
OUTPUT CHARACTERISTICS
Output Voltage Set Point 4.950 5.000 5.050 V
Output Voltage Regulation
Over Line +0.05 \ 2 +0.2 \ 10 %\mV
Over Load +0.05 \ 2 +0.2 \ 10 %\mV
Over Temperature +25 +75 mV
Total Output Voltage Range 4.87 5.13 V Over sample, line, load, temperature & life
Output Voltage Ripple and Noise1 500MHz bandwidth; Figures
13
& 16
Peak-to-Peak 50 100 mV Full Load; see Figures
13
& 16
RMS 10 20 mV Full Load; see Figures
13
& 16
Operating Output Current Range 0 30 A Subject to thermal derating; Figures
5 - 8
Output DC Current-Limit Inception 33 36.5 39 A Output Voltage 10% Low;
Figure 17
Output DC Current-Limit Shutdown Voltage 3.2 V
Back-Drive Current Limit while Enabled 0.5 1.3 2.5 A Negative current drawn from output
Back-Drive Current Limit while Disabled 0 10 50 mA Negative current drawn from output
Maximum Output Capacitance 9,800
µF
5.0Vout at 30A Resistive Load
DYNAMIC CHARACTERISTICS
Input Voltage Ripple Rejection 60 dB 120 Hz; Figure 20
Output Voltage during Load Current Transient
For a Step Change in Output Current (0.1A/µs) 200 mV 50% to 75% to 50% Iout max; Figure 11
For a Step Change in Output Current (1A/µs) 200 mV 50% to 75% to 50% Iout max; Figure 12
Settling Time 400 µs To within 1% Vout nom
Turn-On Transient
Turn-On Time 6 9.2 12 ms Full load, Vout=90% nom.; Figures 9 & 10
Start-Up Inhibit Time 180 200 240 ms
-40°C to +125°C; Figure F
Output Voltage Overshoot 0 % 9,800 µF load capacitance, Iout = 0A
EFFICIENCY
100% Load 90 % Figures 1 - 4
50% Load 91 % Figures 1 - 4
TEMPERATURE LIMITS FOR POWER DERATING CURVES
Semiconductor Junction Temperature 125 °C Package rated to 150°C
Board Temperature 125 °C UL rated max operating temp 130°C
Transformer Temperature 125 °C See Figures 5 - 8 for derating curves
ISOLATION CHARACTERISTICS
Isolation Voltage (dielectric strength) 2000 V
Isolation Resistance 30 M
W
Isolation Capacitance
2
470 pF
PQ60050QTD30 ELECTRICAL CHARACTERISTICS
TA=25°C, airflow rate=300 LFM, Vin=48Vdc unless otherwise noted; full operating temperature range is -40°C to +100°C ambient
temperature with appropriate power derating.
Specifications subject to change without notice.
Note 1: For applications requiring reduced output voltage ripple and noise, consult SynQor applications support (e-mail: support@synqor.com)
Note 2: Higher values of isolation capacitance can be added external to the module.
Product # PQ60050QTA30 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QT650C Rev. E 05/20/09 Page 4
Technical Specification
Input:
Output:
Current:
Package:
35-75 V
5.0 V
30 A
Quarter-brick
Parameter
P Min. Typ. Max. Units Notes & Conditions
FEATURE CHARACTERISTICS
Switching Frequency 250 280 310 kHz Regulation and Isolation stage
ON/OFF Control (Option P)
Off-State Voltage -2 0.8 V
On-State Voltage 2.4 18 V
ON/OFF Control (Option N)
Off-State Voltage 2.4 18 V
On-State Voltage -2 0.8 V
ON/OFF Control (Either Option) Figures A & B
Pull-Up Voltage Vin/6.5 9.2 V
Pull-Up Resistance 40 k
W
Output Voltage Trim Range -20 +10 % Measured across Pins 8 & 4; Figures 23 & C
Output Voltage Remote Sense Range +10 % Measured across Pins 8 & 4
Output Over-Voltage Protection 117 122 127 % Over full temp range; % of nominal Vout
Over-Temperature Shutdown 125 °C Average PCB Temperature
Over-Temperature Shutdown Restart Hysteresis 10 °C
Load Current Scale Factor 857 See App Note: Output Load Current Calc.
RELIABILITY CHARACTERISTICS
Calculated MTBF (Telcordia) 2.1 106 Hrs. TR-NWT-000332; 80% load,300LFM, 40oC Ta
Calculated MTBF (MIL-217) 1.75 106 Hrs. MIL-HDBK-217F; 80% load, 300LFM, 40oC Ta
Field Demonstrated MTBF 106 Hrs. See our website for details
Parameter
P Notes
STANDARDS COMPLIANCE
UL/cUL 60950-1 File # E194341, Basic insulation & pollution degree 2
EN60950-1 Certified by TUV
72/23/EEC
93/68/EEC
Needle Flame Test (IEC 695-2-2) Test on entire assembly; board & plastic components UL94V-0 compliant
IEC 61000-4-2 ESD test, 8kV - NP, 15kV air - NP (Normal Performance)
GR-1089-CORE Section 7 - electrical safety, Section 9 - bonding/grounding
Telcordia (Bellcore) GR-513
•
An external input fuse must always be used to meet these safety requirements. Contact SynQor for official safety
certificates on new releases or download from the SynQor website.
Parameter
P # Units Test Conditions
QUALIFICATION TESTING
Life Test 32 95% rated Vin and load, units at derating point, 1000 hours
Vibration 5 10-55Hz sweep, 0.060” total excursion,1 min./sweep, 120 sweeps for 3 axis
Mechanical Shock 5 100g minimum, 2 drops in x and y axis, 1 drop in z axis
Temperature Cycling 10 -40°C to 100°C, unit temp. ramp 15°C/min., 500 cycles
Power/Thermal Cycling 5 Toperating = min to max, Vin = min to max, full load, 100 cycles
Design Marginality 5 Tmin-10°C to Tmax+10°C, 5°C steps, Vin = min to max, 0-105% load
Humidity 5 85°C, 85% RH, 1000 hours, 2 minutes on and 6 hours off
Solderability 15 pins MIL-STD-883, method 2003
•
Extensive characterization testing of all SynQor products and manufacturing processes is performed to ensure that we supply
robust, reliable product. Contact the factory for official product family qualification documents.
ELECTRICAL CHARACTERISTICS (Continued)
STANDARDS COMPLIANCE
QUALIFICATION TESTING
Product # PQ60050QTA30 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QT650C Rev. E 05/20/09 Page 5
Technical Specification
Input:
Output:
Current:
Package:
35-75 V
5.0 V
30 A
Quarter-brick
88
89
90
91
92
93
94
0 100 200 300 400 500
Air Flow (LFM)
Efficiency (%)
25 C
40 C
55 C
4.0
5.0
6.0
7.0
8.0
9.0
10.0
0 100 200 300 400 500
Air Flow (LFM)
Power Dissipation (W)
25 C
40 C
55 C
Load Current (A)
Efficiency (%)
35 Vin
48 Vin
75 Vin
Figure 1: Efficiency at nominal output voltage vs. load current for
minimum, nominal, and maximum input voltage at 25°C. Figure 2: Efficiency at nominal output voltage and 60% rated power vs.
airflow rate for ambient air temperatures of 25°C, 40°C, and 55°C (nominal
input voltage).
Load Current (A)
Power Dissipation (W)
35 Vin
48 Vin
75 Vin
Figure 3: Power dissipation at nominal output voltage vs. load current for
minimum, nominal, and maximum input voltage at 25°C. Figure 4: Power dissipation at nominal output voltage and 60% rated
power vs. airflow rate for ambient air temperatures of 25°C, 40°C, and
55°C (nominal input voltage).
Ambient Air Temperature (oC)
Iout (A)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
50 LFM (0.25 m/s)
Figure 5: Maximum output power derating curves vs. ambient air
temperature for airflow rates of 50 LFM through 400 LFM with air flowing
across the converter from pin 3 to pin 1 (nominal input voltage).
Figure 6: Thermal plot of converter at 29 amp load current (145W)
with 55°C air flowing at the rate of 200 LFM. Air is flowing across the
converter from pin 3 to pin 1 (nominal input voltage).
Semiconductor junction temperature is
within 1°C of surface temperature
Figures
Product # PQ60050QTA30 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QT650C Rev. E 05/20/09 Page 6
Technical Specification
Input:
Output:
Current:
Package:
35-75 V
5.0 V
30 A
Quarter-brick
Ambient Air Temperature (oC)
Iout (A)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
50 LFM (0.25 m/s)
Figure 7: Maximum output power derating curves vs. ambient air
temperature for airflow rates of 50 LFM through 400 LFM with air flowing
across the converter from input to output (nominal input voltage).
Figure 8: Thermal plot of converter at 26.5 amp load current (133W)
with 55°C air flowing at the rate of 200 LFM. Air is flowing across the
converter from input to output (nominal input voltage).
Figure 9: Turn-on transient at full rated load (resistive load) (2 ms/div) Input
voltage pre-applied. Ch 1: Vout (2V/div). Ch 2: ON/OFF input (5V/div) Figure 10: Turn-on transient at zero load current (2 ms/div).
Ch 1: Vout (2V/div)
Ch 2: ON/OFF input (5V/div)
Figure 11: Output voltage response to step-change in load current (50%-75%-
50% of Iout(max); dI/dt = 0.1A/µs). Load cap: 10µF, 100 m
W
ESR tantalum
cap and 1µF ceramic capacitor. Ch 1: Vout (500mV/div), Ch 2: Iout (10A/div).
Figure 12: Output voltage response to step-change in load current (50%-75%-
50% of Iout(max): dI/dt = 5A/µs). Load cap: 470µF, 30 m
W
ESR tantalum
capacitor and 1µF ceramic cap. Ch 1: Vout (500mV/div), Ch 2: Iout (10A/div).
Semiconductor junction temperature
is within 1°C of surface temperature
Product # PQ60050QTA30 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QT650C Rev. E 05/20/09 Page 7
Technical Specification
Input:
Output:
Current:
Package:
35-75 V
5.0 V
30 A
Quarter-brick
Figure 13: Test set-up diagram showing measurement points for Input
Terminal Ripple Current (Figure 14), Input Reflected Ripple Current (Figure
15) and Output Voltage Ripple (Figure 16).
10 µH
source
impedance
DC/DC
Converter
See Fig. 15 See Fig. 14
See Fig. 16
1 µF
ceramic
capacitor
10 µF,
100m
W
ESR
tantalum
capacitor
47 µF,
@1
W
ESR
electrolytic
capacitor
VSOURCE
iSiCVOUT
Figure 14: Input Terminal Ripple Current, ic, at full rated output current
and nominal input voltage with 10µH source impedance and 47µF
electrolytic capacitor (200 mA/div). See Figure 13.
Figure 15: Input reflected ripple current, is, through a 10 µH source
inductor at nominal input voltage and rated load current (10 mA/div). See
Figure 13.
Figure 16: Output voltage ripple at nominal input voltage and rated load
current (50 mV/div). Load capacitance: 1µF ceramic capacitor and 10µF
tantalum capacitor. Bandwidth: 500 MHz. See Figure 13.
Figure 17: Output voltage vs. load current showing typical current limit
curves and converter shutdown points. Figure 18: Load current (20A/div) as a function of time when the converter
attempts to turn on into a 1 m
W
short circuit. Top trace (2ms/div) is an
expansion of the on-time portion of the bottom trace.
Product # PQ60050QTA30 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QT650C Rev. E 05/20/09 Page 8
Technical Specification
Input:
Output:
Current:
Package:
35-75 V
5.0 V
30 A
Quarter-brick
Hz
Output Impedance (ohm)
35 Vin
48 Vin
75 Vin
Figure 19: Magntiude of incremental output impedance (Zout = vout/iout)
for minimum, nominal, and maximum input voltage at full rated power.
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
10 100 1,000 10,000 100,000
Hz
Forward Transmission (dB)
35 Vin
48 Vin
75 Vin
Figure 20: Magnitude of incremental forward transmission (FT = vout/vin)
for minimum, nominal, and maximum input voltage at full rated power.
Hz
Reverse Transmission (dB)
35 Vin
48 Vin
75 Vin
Figure 21: Magnitude of incremental reverse transmission (RT = iin/iout)
for minimum, nominal, and maximum input voltage at full rated power.
0.1
1
10
100
10 100 1,000 10,000 100,000
Hz
Input Impedance (ohm)
35 Vin
48 Vin
75 Vin
Figure 22: Magnitude of incremental input impedance (Zin = vin/iin) for
minimum, nominal, and maximum input
voltage at full rated power.
Input Voltage (V)
Vout Trim-up (%)
100% Load
50% Load
0% Load
Figure 23: Achievable trim-up percentage vs. input voltage. at output loads
of 0%, 50% and full load.
Product # PQ60050QTA30 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QT650C Rev. E 05/20/09 Page 9
Technical Specification
Input:
Output:
Current:
Package:
35-75 V
5.0 V
30 A
Quarter-brick
BASIC OPERATION AND FEATURES
The PowerQor series converter uses a two-stage power conversion
topology. The first stage is a buck-converter that keeps the output
voltage constant over variations in line, load, and temperature.
The second stage uses a transformer to provide the functions of
input/output isolation and voltage step-down to achieve the low
output voltage required.
Both the first stage and the second stage switch at a fixed fre-
quency for predictable EMI performance. Rectification of the trans-
former’s output is accomplished with synchronous rectifiers. These
devices, which are MOSFETs with a very low on-state resistance,
dissipate far less energy than Schottky diodes. This is the primary
reason that the PowerQor converter has such high efficiency, even
at very low output voltages and very high output currents.
Dissipation throughout the converter is so low that it does not
require a heatsink for operation. Since a heatsink is not required,
the PowerQor converter does not need a metal baseplate or
potting material to help conduct the dissipated energy to the
heatsink. The PowerQor converter can thus be built more simply
and reliably using high yield surface mount techniques on a PCB
substrate.
The PowerQor series of half-brick and quarter-brick converters
uses the industry standard footprint and pin-out configuration.
CONTROL FEATURES
REMOTE ON/OFF (Pin 2): The ON/OFF input, Pin 2, permits
the user to control when the converter is on or off. This input is
referenced to the return terminal of the input bus, Vin(-). There
are two versions of the converter that differ by the sense of the
logic used for the ON/OFF input.
In the positive logic version, the ON/OFF input is active high
(meaning that a high turns the converter on). In the negative logic
version, the ON/OFF signal is active low (meaning that a low
turns the converter on). Figure A details five possible circuits for
driving the ON/OFF pin. Figure B is a detailed look of the internal
ON/OFF circuitry.
REMOTE SENSE(+) (Pins 7 and 5): The SENSE(+) inputs
correct for voltage drops along the conductors that connect the
converter’s output pins to the load.
Pin 7 should be connected to Vout(+) and Pin 5 should be con-
nected to Vout(-) at the point on the board where regulation is
desired. A remote connection at the load can adjust for a voltage
drop only as large as that specified in this datasheet, that is
[Vout(+) - Vout(-)] – [Vsense(+) - Vsense(-)] <
Sense Range % x Vout
Pins 7 and 5 must be connected for proper regulation of the out-
put voltage. If these connections are not made, the converter will
deliver an output voltage that is slightly higher than its specified
value.
Note: the output over-voltage protection circuit senses the volt-
age across the output (pins 8 and 4) to determine when it should
trigger, not the voltage across the converter’s sense leads (pins
7 and 5). Therefore, the resistive drop on the board should be
small enough so that output OVP does not trigger, even during
load transients.
Figure A: Various circuits for driving the ON/OFF pin. Figure B: Internal ON/OFF pin circuitry
OpenCollectorEnableCircuit
RemoteEnableCircuit
DirectLogicDrive
NegativeLogic
(PermanentlyEnabled)
PositiveLogic
(PermanentlyEnabled)
ON/OFF
Vin(_)
ON/OFF
ON/OFF
Vin(_)
ON/OFF
5V
TTL/
CMOS
Vin(_)
ON/OFF
Vin(_)
Vin(_)
Figure A: Various circuits for driving the ON/OFF pin.
TTL
5V
50k
274k
50k
ON/OFF
Vin(_)
Vin(+)
100pF
Figure B: Internal ON/OFF pin circuitry
Application section
Product # PQ60050QTA30 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QT650C Rev. E 05/20/09 Page 10
Technical Specification
Input:
Output:
Current:
Package:
35-75 V
5.0 V
30 A
Quarter-brick
OUTPUT VOLTAGE TRIM (Pin 6): The TRIM input permits the
user to adjust the output voltage across the sense leads up or
down according to the trim range specifications.
To decrease the output voltage, the user should connect a resistor
between Pin 6 and Pin 5 (SENSE(-) input). For a desired decrease
of the nominal output voltage, the value of the resistor should be
Rtrim-down =
(
511
)
- 10.22 (kW)
D%
where
D% =
Vnominal – Vdesired
x 100%
Vnominal
To increase the output voltage, the user should connect a resistor
between Pin 6 and Pin 7 (SENSE(+) input). For a desired increase
of the nominal output voltage, the value of the resistor should be
Rtrim-up
(k
W)
)
where
VOUT = Nominal Output Voltage
= (
_ 511 _ 10.22
5.11VOUT(100+
D%)
1.225D%D%
Figure C graphs the relationship between the trim resistor value
and Rtrim-up and Rtrim-down, showing the total range the output
voltage can be trimmed up or down.
10
100
1,000
10,000
100,000
0 2 4 6 8 10 12 14 16 18 20
Trim Resistance (kOhms)
% increase Vout % decrease Vout
Figure C: Trim Graph for 5.0Vout module
Note: the TRIM feature does not affect the voltage at which the
output over-voltage protection circuit is triggered. Trimming the
output voltage too high may cause the over-voltage protection
circuit to engage, particularly during transients.
It is not necessary for the user to add capacitance at the Trim pin.
The node is internally bypassed to eliminate noise.
Total DC Variation of Vout: For the converter to meet its full
specifications, the maximum variation of the DC value of Vout,
due to both trimming and remote load voltage drops, should not
be greater than that specified for the output voltage trim range.
PROTECTION FEATURES
Input Under-Voltage Lockout: The converter is designed to
turn off when the input voltage is too low, helping avoid an input
system instability problem, described in more detail in the applica-
tion note titled “Input System Instability”. The lockout circuitry is a
comparator with DC hysteresis. When the input voltage is rising,
it must exceed the typical Turn-On Voltage Threshold value (listed
on the specification page) before the converter will turn on. Once
the converter is on, the input voltage must fall below the typical
Turn-Off Voltage Threshold value before the converter will turn off.
Output Current Limit: The maximum current limit remains
constant as the output voltage drops. However, once the imped-
ance of the short across the output is small enough to make the
output voltage drop below the specified Output DC Current-Limit
Shutdown Voltage, the converter turns off.
The converter then enters a “hiccup mode” where it repeatedly
turns on and off at a 5 Hz (nominal) frequency with a 5% duty
cycle until the short circuit condition is removed. This prevents
excessive heating of the converter or the load board.
Output Over-Voltage Limit: If the voltage across the output
pins exceeds the Output Over-Voltage Protection threshold, the
converter will immediately stop switching. This prevents damage
to the load circuit due to 1) excessive series resistance in output
current path from converter output pins to sense point, 2) a release
of a short-circuit condition, or 3) a release of a current limit condi-
tion. Load capacitance determines exactly how high the output
voltage will rise in response to these conditions. After 200 ms the
converter will automatically restart.
Over-Temperature Shutdown: A temperature sensor on the
converter senses the average temperature of the module. The ther-
mal shutdown circuit is designed to turn the converter off when the
temperature at the sensed location reaches the Over-Temperature
Shutdown value. It will allow the converter to turn on again when
the temperature of the sensed location falls by the amount of the
Over-Temperature Shutdown Restart Hysteresis value.
Product # PQ60050QTA30 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QT650C Rev. E 05/20/09 Page 11
Technical Specification
Input:
Output:
Current:
Package:
35-75 V
5.0 V
30 A
Quarter-brick
APPLICATION CONSIDERATIONS
Input System Instability: This
condition can occur because
any DC/DC converter appears incrementally as a negative
resistance load. A detailed application note titled “Input System
Instability” is available on the SynQor web site (www.synqor.
com) which provides an understanding of why this instability
arises, and shows the preferred solution for correcting it.
Application Circuits: Figure D below provides a typical circuit
diagram which details the input filtering and voltage trimming.
Input Filtering and External Capacitance: Figure E below
provides a diagram showing the internal input filter components.
This filter dramatically reduces input terminal ripple current, which
otherwise could exceed the rating of an external electrolytic input
capacitor. The recommended external input capacitance is speci-
fied in the “Input Characterisitcs” section. More detailed informa-
tion is available in the application note titled “EMI Characteristics”
on the SynQor website.
Figure D: Typical application circuit (negative logic unit, permanently enabled).
Figure E: Internal Input Filter Diagram (component values
listed on page 3).
Vin External
Input
FilterTrim
Vin(+)
Iload
Cload
Vout(+)
Rtrim-up
or
Rtrim-down
Vsense(+)
ON/OFF
Vin(
_
)Vout(
_
)
Vsense(
_
)
Electrolytic
Capacitor
C2
C1
Vin(+)
Vin(_)
Product # PQ60050QTA30 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QT650C Rev. E 05/20/09 Page 12
Technical Specification
Input:
Output:
Current:
Package:
35-75 V
5.0 V
30 A
Quarter-brick
Startup Inhibit Period: The Startup Inhibit Period ensures that
the converter will remain off for approximately 200ms when it is
shut down for any reason. When an output short is present, this
generates a 5Hz “hiccup mode,” which prevents the converter
from overheating. In all, there are seven ways that the converter
can be shut down, initiating a Startup Inhibit Period:
• Input Under-Voltage Lockout
• Input Over-Voltage Shutdown (not present in Quarter-brick)
• Output Over-Voltage Protection
• Over Temperature Shutdown
• Current Limit
• Short Circuit Protection
• Turned off by the ON/OFF input
Figure F shows three turn-on scenarios, where a Startup Inhibit
Period is initiated at t0, t1, and t2:
Before time t0, when the input voltage is below the UVL threshold,
the unit is disabled by the Input Under-Voltage Lockout feature.
When the input voltage rises above the UVL threshold, the Input
Under-Voltage Lockout is released, and a Startup Inhibit Period is
initiated. At the end of this delay, the ON/OFF pin is evaluated,
and since it is active, the unit turns on.
At time t1, the unit is disabled by the ON/OFF pin, and it cannot
be enabled again until the Startup Inhibit Period has elapsed.
When the ON/OFF pin goes high after t2, the Startup Inhibit
Period has elapsed, and the output turns on within the typical
Turn-On Time.
Figure F: Startup Inhibit Period (turn-on time not to scale)
Under-Voltage
Lockout Turn-On
Threshold
ON/OFF
(pos logic)
Vout
Vin
200ms 200ms
200ms
(typical start-up
inhibit period)
t0t1t2t
4ms (typical
turn on time)
ON ON ON
OFF OFF
Product # PQ60050QTA30 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QT650C Rev. E 05/20/09 Page 13
Technical Specification
Input:
Output:
Current:
Package:
35-75 V
5.0 V
30 A
Quarter-brick
PART NUMBERING SYSTEM
The part numbering system for SynQor’s dc-dc converters
follows the format shown in the example below.
Thefirst12characterscomprisethebasepartnumberand
the last 3 characters indicate available options. The “-G”
suffix indicates 6/6 RoHS compliance.
Application Notes
A variety of application notes and technical white papers can
be downloaded in pdf format from our website.
RoHS Compliance:TheEUledRoHS(RestrictionofHazardous
Substances) Directive bans the use of Lead, Cadmium,
Hexavalent Chromium, Mercury, Polybrominated Biphenyls
(PBB), and Polybrominated Diphenyl Ether (PBDE) in Electrical
and Electronic Equipment. This SynQor product is 6/6 RoHS
compliant. For more information please refer to SynQor’s
RoHS addendum available at our RoHSCompliance/LeadFree
Initiativewebpage or e-mail us at
rohs@synqor.com
.
ORDERING INFORMATION
The tables below show the valid model numbers and ordering
optionsforconvertersinthisproductfamily.Whenordering
SynQor converters, please ensure that you use the complete
15 character part number consisting of the 12 character
base part number and the additional characters for options.
Add“-G”tothemodelnumberfor6/6RoHScompliance.
The following options must be included in place of the
x y z
spaces in the model numbers listed above.
Not all combinations make valid part numbers, please contact
SynQor for availability. See the Product Summary web page for
more options.
PATENTS
SynQor holds the following patents, one or more of which
might apply to this product:
5,999,417 6,222,742 6,545,890 6,577,109
6,594,159 6,731,520 6,894,468 6,896,526
6,927,987 7,050,309 7,072,190 7,085,146
7,119,524 7,269,034 7,272,021 7,272,023
Warranty
SynQor offers a three (3) year limited warranty. Complete warranty informa-
tion is listed on our website or is available upon request from SynQor.
InformationfurnishedbySynQorisbelievedtobeaccurateandreliable.
However, no responsibility is assumed by SynQor for its use, nor for any
infringements 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 SynQor.
Product Family
Package Size
Performance Level
Thermal Design
Output Current
6/6 RoHS
Options (see
Ordering Information)
Input Voltage
Output Voltage
Contact SynQor for further information:
Phone: 978-849-0600
TollFree: 888-567-9596
Fax: 978-849-0602
E-mail: power@synqor.com
Web:
www.synqor.com
Address: 155SwansonRoad
Boxborough,MA01719
USA
PQ 60 050 Q T A 30 N K S - G
Options Description:
x y z
Enable Logic
Pin Length Feature Set
P - Positive
N - Negative
K - 0.110"
N - 0.145"
R - 0.180"
Y - 0.250"
S - Standard
Model Number Continuous Input
Voltage Output Voltage Maximum Output Current
PQ60010QTA40
xyz
35-75V 1.0V 40A
PQ60012QTA40
xyz
35-75V 1.2V 40A
PQ60015QTA40
xyz
35-75V 1.5V 40A
PQ60018QTA40
xyz
35-75V 1.8V 40A
PQ60025QTA40
xyz
35-75V 2.5V 40A
PQ60033QTA35
xyz
35-75V 3.3V 35A
PQ60050QTA30
xyz
35-75V 5V 30A
PQ60120QTA12
xyz
35-75V 12V 12A