Product # PQ40150QGx07 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QG157D Rev. C 11/27/12 Page 1
Technical
Specification
PQ40150QGx07
PQ40150QGx07 Module
Operational Features
Protection Features
Control Features
Safety Features
Contents
Mechanical Features
The PQ40150QGx07 PowerQor Giga quarter-brick
converter is a next-generation, board-mountable, isolated,
xed switching frequency DC/DC converter that uses
synchronous rectication to achieve extremely high
conversion efciency. 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 highyield surface mount technology for
greater reliability. The PQ40 module offers a wide input
voltage range to cover both 24V and 48V applications.
RoHS compliant, see last page.
• High efciency, >90% at full rated load current
• Delivers up to 6.67A of output current with minimal derating
- no heatsink required
• Ultra wide input voltage range: 18V – 75V, with 100V
100ms input voltage transient capability
• Fixed frequency switching provides predictable EMI performance
• No minimum load requirement means no preload resistors required.
• 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
• Input under-voltage lockout disables converter at low input voltage
• Output current limit and short circuit protection protects converter
from excessive load current or short circuits
• Active back bias limit prevents damage to converter from external
load induced pre-bias
• Output over-voltage protection protects load from damaging voltages
• Thermal shutdown protectsconverer from abnormal
environmental conditions
18-75V 15V 6.67A 100W 2000V dc Quarter-brick
Continuous Input Outputs Current Max Power Isolation DC-DC Converter
• Industry standard pin-out conguration
• Standard Size:2.30"x1.45"x0.397" (58.4x36.8x10.08mm)
• Weight: 1.32 oz. (37.5 grams)
• Flanged pins designed to permit surface mount soldering,
avoid wave solder using FPiP technique on open frame units
• UL 60950-1:2007
• CAN/CSA-C22.2 No. 60950-1:2007
• EN60950-1/A12:2011
Page No.
Mechanical Diagrams..................................... 2
Electrical Characteristics................................... 4
Figures............................................... 6
Application Section ......................................11
Ordering Information.....................................16
Product # PQ40150QGx07 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QG157D Rev. C 11/27/12 Page 2
Input:
Output:
Current:
Package:
18-75V
15V
6.25A
Quarter-brick
Mechanical Diagrams
Open Frame Mechanical Diagram
8 7 6 5 4
1 2 3
TOP VIEW SIDE VIEW
.600 [15.24]
.600 [15.24]
.300 [7.62]
.450 [11.43]
.300 [7.62]
.150 [3.81]
2.32
[58.9]
.14 [3.6]
.43 [10.8]
.031 ± .027
[0.79 ± 0.68]
Bottomside
Clearance
.397 ± .015
[10.08 ± 0.38]
Overall Height
.180
[4.57]
See Note 6
2.00
[50.8]
1.45 [36.8]
NOTES
1) Pins 1-3, 5-7 are 0.040” (1.02mm) diameter, with 0.080” (2.03mm)
diameter standoff shoulders.
Pins 4 and 8 are 0.062” (1.57 mm) diameter with 0.100” (2.54 mm)
2) diameter standoff shoulders.
3) Other pin extension lengths available.
4) All Pins: Material - Copper Alloy- Finish - Matte Tin over Nickel plate
Undimensioned components are shown for visual reference only.
5) Weight: 1.32 oz. (37.5 grams)
All dimensions in inches (mm)
6) Tolerances: x.xx in +/-0.02 in. (x.xmm +/-0.5 mm)
x.xxx in +/-0.010 in. (x.xxmm +/-0.25 mm)
PIN DESIGNATIONS
Pin Name Function
1 Vin(+) 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
Notes:
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 # PQ40150QGx07 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QG157D Rev. C 11/27/12 Page 3
Input:
Output:
Current:
Package:
18-75V
15V
6.25A
Quarter-brick
Baseplated Mechanical Diagram
8 7 6 5 4
1 2 3
TOP VIEW SIDE VIEW
.600 [15.24]
.600 [15.24]
.300 [7.62]
.450 [11.43]
.300 [7.62]
.150 [3.81]
.150 [3.81]
2.32
[58.9]
.44 [11.1]
M3 Threaded Inserts
4 Places
See Notes 1 & 2
.031 ± .027
[0.79 ± 0.68]
Bottomside
Clearance
.469 ± .022
[11.91 ± 0.55]
Overall Height
1.86
[47.2]
.180
[4.57]
See Note 6
2.002
[50.8]
1.47 [37.3]
1.03 [26.2]
.22 [5.6]
.23 [5.8]
NOTES
1) M3 screws used to bolt unit’s baseplate to other surfaces (such as a
heatsink) must not exceed 0.100” (2.54 mm) depth below the surface
of the baseplate.
2) Applied torque per screw should not exceed 6in-lb. (0.7 Nm).
3) Baseplate atness tolerance is 0.004” (.10mm) TIR for surface.
4) Pins 1-3, 5-7 are 0.040” (1.02mm) diameter, with 0.080” (2.03mm)
diameter standoff shoulders.
5) Pins 4 and 8 are 0.062” (1.57 mm) diameter with 0.100” (2.54 mm)
diameter standoff shoulders.
6) Other pin extension lengths available. Recommended pin length is
0.03” (0.76mm) greater than the PCB thickness.
7) All Pins: Material - Copper Alloy- Finish - Matte Tin over Nickel plate
8) Undimensioned components are shown for visual reference only.
9) Weight: 2.15 oz. (60.9 g) typical
10) All dimensions in inches (mm)
Tolerances: x.xx in +/-0.02 in. (x.xmm +/-0.5 mm)
x.xxx in +/-0.010 in. (x.xxmm +/-0.25 mm)
PIN DESIGNATIONS
Pin Name Function
1 Vin(+) 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
Notes:
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 # PQ40150QGx07 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QG157D Rev. C 11/27/12 Page 4
Input:
Output:
Current:
Package:
18-75V
15V
6.25A
Quarter-brick
PQ40150QGx07 Electrical Characteristics
Ta = 25 °C, airow rate = 300 LFM, Vin = 48Vdc, nominal Vout unless otherwise noted; full operating temperature range is -40 °C to +100 °C ambient
temperature with appropriate power derating. Specications subject to change without notice.
Parameter Min. Typ. Max. Units Notes & Conditions
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Non-Operating -1 100 V Continuous
Operating 80 V Continuous
Operating Transient Protection 100 V 100 V 100ms 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 18 48 75 V
Input Under-Voltage Lockout
Turn-On Voltage Threshold 16 16.5 17 V
Turn-Off Voltage Threshold 14.5 15 15.5 V
Lockout Hysteresis Voltage 1.0 1.5 2.0 V
Maximum Input Current 6.17 A 100% Load, 18Vin
No-Load Input Current 80 160 mA
Disabled Input Current 2.0 4 mA
Inrush Current Transient Rating 0.03 A2s
Response to Input Transient 350.0 mV 1000V/ms input transient, 48V-75V step
Input Reected Ripple Current 5.0 mA P-P thru 10μH inductor; Figures 17 & 19
Input Terminal Ripple Current 145.0 mA RMS; Figures 17 & 18
Recommended Input Fuse 20 A Fast blow external fuse recommended
Input Filter Component Values (L\C) 1.5 \ 6.6 μH\μF Internal values; Figure E
Recommended External Input Capacitance 47.0 μF
OUTPUT CHARACTERISTICS
Output Voltage Set Point 14.77 15.00 1.82 V
Output Voltage Regulation
Over Line ±0.04 \ 6 ±0.2 \ 30 % (mV)
Over Load ±0.04 \ 6 ±0.2 \ 30 % (mV)
Over Temperature ±112 ±300 mV
Total Output Voltage Range 14.47 15.54 V over sample line, load and temperature
Output Voltage Ripple and Noise 20MHz bandwidth; Figures 17 & 20
Peak-to-Peak 75 150 mV Full Load, Figures 17 & 20
RMS 15 30 mV Full Load, Figures 17 & 20
Operating Output Current Range 0 6.67 A Subject to thermal derating; Figures 5 - 12
Output DC Current-Limit Inception 7 8 9 A Output Voltage 10% Low; Figure 21
Output DC Current-Limit Shutdown Voltage 13.2
Back-Drive Current Limit while Enabled 0.1 0.3 0.8 Negative current drawn from output
Back-Drive Current Limit while Disabled 0 10 50 mA Negative current drawn from output
Maximum Output Capacitance 2000 μF 15Vout at 6.7A Resistive Load
EFFICIENCY
100% Load (24Vin) 90 % Figures 1 - 4, 24Vin
50% Load (24Vin) 91 % Figures 1 - 4, 24Vin
100% Load (48Vin) 89 % Figures 1 - 4, 48Vin
50% Load (48Vin) 90 % Figures 1 - 4, 48Vin
Technical Specifications
Electrical Characteristics
Product # PQ40150QGx07 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QG157D Rev. C 11/27/12 Page 5
Input:
Output:
Current:
Package:
18-75V
15V
6.25A
Quarter-brick
PQ40150QGx07 Electrical Characteristics (continued)
Ta = 25 °C, airow rate = 300 LFM, Vin = 48V dc unless otherwise noted; full operating temperature range is -40 °C to +100 °C baseplate temperature
with appropriate power derating. Specications subject to change without notice.
Parameter Min. Typ. Max. Units Notes & Conditions
DYNAMIC CHARACTERISTICS
Input Voltage Ripple rejection 45.00 dB 120 Hz; Figure 24
Output Voltage Current Transient
For a Step Change in Output Current (0.1A/μs) 190 mV 50% to 75% to 50% Iout max; Figure 15
For a Step Change in Output Current (4A/μs) 190 mV 50% to 75% to 50% Iout max; Figure 16
Settling Time 700 μs To within 1% Vout nom
Turn-On Transient
Turn-On Time 4 8 16 ms Full load, Vout=90% nom.; Figures 13 & 14
Start-Up Inhibit Period 180 200 240 ms -40°C to +125°C; Figure F
Output Voltage Overshoot 0 %
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 Figures 5 - 12 for derating curves
ISOLATION CHARACTERISTICS
Isolation Voltage 2000 V
Isolation Resistance 10 MΩ
Isolation Capacitance 470 pF
FEATURE CHARACTERISTICS
Switching Frequency 291 315 340 kHz
ON/OFF Control (Option P)
Off-Stage Voltage -2 0.8 V
On-Stage Voltage 2.4 18 V
ON/OFF Control (Option N)
Off-Stage Voltage 2.4 18 V
On-Stage Voltage -2 0.8 V
ON/OFF Control (Either Option) Figures A & B
Pull-up Voltage Vin/4.25 17.7 V
Pull-up Resistance 33 kΩ Across Pins 8 & 4; Figure C; Figure 27
Output Voltage Trim Range -20 +10 % Across Pins 8 & 4; Figure 27
Output Over-Voltage Protection 117 122 127 % Over full temp range; % of nominal Vout
Over-Tempperature Shutdown 125 °C Average PCB Temperature
Load Current Scale Factor 10 °C
Load Current Scale Factor 1000 See Output Load Current app. note on our web
RELIABILITY CHARACTERISTICS
Calculated MTBF (Telcordia) 2.50 106 Hrs. TR-NWT-000332; 80% load, 300LFM, 40°C Ta
Calculated MTBF (MIL-217) 1.56 106 Hrs. MIL-HDBK-217F; 80% load, 300LFM, 40°C Ta
Field Demonstrated MTBF 106 Hrs. See our website for details
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.
Technical Specifications
Product # PQ40150QGx07 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QG157D Rev. C 11/27/12 Page 6
Input:
Output:
Current:
Package:
18-75V
15V
6.25A
Quarter-brick
60
65
70
75
80
85
90
95
100
01234567
Efficiency (%)
Load Current (A)
18 Vin
48 Vin
75 Vin
87
88
89
90
91
92
100
200
300
400
Efficiency (%)
Air Flow (LFM)
25 ºC
40 ºC
55 ºC
0
2
4
6
8
10
12
14
01234567
Power Dissipation (W)
Load Current (A)
3
4
5
6
7
100
200
300
400
Power Dissipation (W)
Air Flow (LFM)
25 ºC
40 ºC
55 ºC
2
3
4
5
6
7
8
0
25
40
55
70
85
Iout (A)
Ambient Air Temperature (°C)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
Figures
Figure 1: Efciency at nominal output voltage vs. load current for 18V,
48V and 75V input at 25°C.
Figure 2: Efciency at nominal output voltage and 60% rated power vs.
airow rate for ambient air temperatures of 25°C, 40°C, and 55°C
(nominal input voltage, 48V input).
Figure 3: Power dissipation at nominal output voltage vs. load current
for 18V, 48V and 75V input at 25°C.
Figure 4: Power dissipation at nominal output voltage and 60% rated
power vs. airow rate for ambient air temperatures of 25°C, 40°C, and
55°C (nominal input voltage, 48V input).
Figure 5: Maximum output power derating curves vs. ambient air temperature
for airow rates of 100 LFM through 400 LFM with air owing across the
converter from pin 3 to pin 1 (24V input).
Figure 6: Thermal plot of converter at 6.7 amp load current with 55°C
air owing at the rate of 200 LFM. Air is owing across the converter
sideways from pin 3 to pin 1 (24V input).
Technical Figures
Product # PQ40150QGx07 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QG157D Rev. C 11/27/12 Page 7
Input:
Output:
Current:
Package:
18-75V
15V
6.25A
Quarter-brick
2
3
4
5
6
7
0
25
40
55
70
85
Iout (A)
Ambient Air Temperature (°C)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
2
3
4
5
6
7
8
0
25
40
55
70
85
Iout (A)
Ambient Air Temperature (°C)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
2
3
4
5
6
7
0
25
40
55
70
85
Iout (A)
Ambient Air Temperature (°C)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
Figure 7: Maximum output power derating curves vs. ambient air temperature
for airow rates of 0 LFM through 400 LFM with air owing from pin 3 to pin 1
(48V input).
Figure 8: Thermal plot of converter at 25 amp load current with 55°C air owing
at the rate of 200 LFM. Air is owing across the converter sideways from pin 3
to pin 1 (48V input).
Figure 9: Maximum output power-derating curves vs. ambient air temperature
for airow rates of 100 LFM through 400 LFM with air owing from input to
output (24V input).
Figure 10: Thermal plot of converter at 6.7 amp load current with 85°C air
owing at the rate of 200 LFM. Air is owing across the converter from input to
output (24V input).
Figure 11: Maximum output power-derating curves vs. ambient air temperature
for airow rates of 100 LFM through 400 LFM with air owing from input to
output (48V input).
Figure 12: Thermal plot of converter at 6.2 amp load current with 85°C air
owing at the rate of 200 LFM. Air is owing across the converter from input to
output (48V input).
Technical Figures
Product # PQ40150QGx07 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QG157D Rev. C 11/27/12 Page 8
Input:
Output:
Current:
Package:
18-75V
15V
6.25A
Quarter-brick
10
µ
H
source
impedance
DC/DC
Converter
See Fig. 19
See Fig. 18
See Fig. 20
1
µ
F
ceramic
capacitor
10
µ
F,
100m
Ω
ESR
tantalum
capacitor
47
µ
F,
<1
Ω
ESR
electrolytic
capacitor
V
SOURCE
i
S
i
CV
OUT
Figure 13: Turn-on transient at full load (resistive load) (4 ms/div). Input voltage
pre-applied. Ch 1: Vout (5V/div). Ch 2: ON/OFF input (5V/div).
Figure 14:Turn-on transient at zero load (4 ms/div). Ch 1: Vout (5V/div). Ch 2:
ON/OFF input (5V/div).
Figure 15: Output voltage response to step-change in load current (50%-75%-
50% of Iout(max); dI/dt = 0.1A/μ s). Load cap: 10μ F, 100 mΩ ESR tantalum cap
and 1μ F ceramic cap. Ch 1: Vout (500mV/div), Ch 2: Iout (2A/div).
Figure 16: Output voltage response to step-change in load current (50%-75%-
50% of Iout(max): dI/dt = 5A/μs). Load cap: 470μ F, 30mΩ ESR tantalum cap
and 1μF ceramic cap. Ch 1: Vout (200mV/div), Ch 2: Iout (2A/div).
Figure 17: Test set-up diagram showing measurement points for Input Terminal
Ripple Current (Fig 18), Input Reected Ripple Current (Fig 19) and Output
Voltage Ripple (Fig 20).
Figure 18: Input Terminal Ripple Current, ic, at full rated output current and
nominal input voltage with 10μH source impedance and 47μF electrolytic
capacitor (200mA/div). See Figure 17.
Technical Figures
Product # PQ40150QGx07 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QG157D Rev. C 11/27/12 Page 9
Input:
Output:
Current:
Package:
18-75V
15V
6.25A
Quarter-brick
8
9
10
11
12
13
14
15
16
0123456789
Output Voltage (V)
Load Current (A)
35 Vin
48 Vin
75 Vin
0.0001
0.001
0.01
0.1
1
10 100 1,000 10,000 100,000 1,000,000
Output Impedance (ohms)
Hz
18 Vin
48 Vin
75 Vin
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
10 100 1,000 10,000 100,000
Forward Transmission (dB)
Hz
18 Vin
48 Vin
75 Vin
Figure 19: Input reected ripple current, is, through a 10 μH source inductor at
nominal input voltage and rated load current (10mA/div). See Figure 17.
Figure 20: Output voltage ripple at nominal input voltage and rated load current
(20mV/div). Load capacitance: 1μF ceramic capacitor and 10μF tantalum
capacitor. Bandwidth: 20MHz. See Figure 17.
Figure 21: Output voltage vs. load current showing typical current limit curves
and converter shutdown points.
Figure 22: Load current (5A/div) as a function of time when the converter
attempts to turn on into a 10 mW short circuit. Top trace (40ms/div) is an
expansion of the on-time portion of the bottom trace.
Figure 23: Magnitude of incremental output impedance (Zout = vout/iout) for
minimum, nominal, and maximum input voltage at full rated power.
Technical Figures
Figure 24: Magnitude of incremental forward transmission (FT = vout/vin) for
minimum, nominal, and maximum input voltage at full rated power.
Product # PQ40150QGx07 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QG157D Rev. C 11/27/12 Page 10
Input:
Output:
Current:
Package:
18-75V
15V
6.25A
Quarter-brick
-90
-85
-80
-75
-70
-65
-60
-55
-50
-45
-40
10 100 1,000 10,000 100,000 1,000,000
Reverse Transmission (dB)
Hz
18 Vin
48 Vin
75 Vin
0.1
1
10
100
10 100 1,000 10,000 100,000
Input Impedance (ohms)
Hz
18 Vin
48 Vin
75 Vin
2
3
4
5
6
7
8
9
10
11
12
23.0
22.5
22.0
21.5
21.0
20.5
20.0
19.5
19.0
18.5
18.0
Vout Trim-up (%)
Input Voltage (V)
+80 ºC
+25 ºC
-40 ºC
Figure 25: Magnitude of incremental reverse transmission (RT = iin/iout) for
minimum, nominal, and maximum input voltage at full rated power.
Figure 26: Magnitude of incremental input impedance (Zin = vin/iin) for
minimum, nominal, and maximum input voltage at full rated power.
Figure 27: Achievable trim-up percentage vs. input voltage at +85°C, +25°C
and -40°C (all at full load). Full trim-up percentage is achieved at loads of 50%
or less across full temperature and input voltage range.
Product # PQ40150QGx07 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QG157D Rev. C 11/27/12 Page 11
Input:
Output:
Current:
Package:
18-75V
15V
6.25A
Quarter-brick
Application Section
Application Section
Open Collector Enable Circuit
Figure A: Various circuits for driving the ON/OFF pin. Figure B: Internal ON/OFF pin circuitry
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(_)
TTL
5V
50k
162k
Vin(+)
ON/OFF
Vin(_)
50k
100pF
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
frequency for predictable EMI performance. Rectification of the
transformer’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
connected 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 output 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
voltage 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.
Product # PQ40150QGx07 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QG157D Rev. C 11/27/12 Page 12
Input:
Output:
Current:
Package:
18-75V
15V
6.25A
Quarter-brick
Application Section
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.
Figure C: Trim Graph
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
application 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
impedance 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 condition. 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 thermal 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.
10.0
100.0
1,000.0
10,000.0
100,000.0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Trim Resistance (kOhms)
% Increase in Vout
% Decrease in Vout
Product # PQ40150QGx07 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QG157D Rev. C 11/27/12 Page 13
Input:
Output:
Current:
Package:
18-75V
15V
6.25A
Quarter-brick
Application Section
Vin
External
Input
Filter
Trim
Vin(+)
Iload
Cload
Vout(+)
Rtrim-up
or
Rtrim-down
Vsense(+)
ON/OFF
Vin(_)Vout(_)
Vsense(_)
Electrolytic
Capacitor
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 website 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 specified in the “Input Characteristics” section.
More detailed information is available in the application note
titled “EMI Characteristics” on the
SynQor website
.
47µF
Figure D: Typical application circuit (negative logic unit, permanently enabled).
Figure E: Internal Input Filter Diagram (component values listed on page 3).
C
L
Vin(+)
Vin(_)
Product # PQ40150QGx07 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QG157D Rev. C 11/27/12 Page 14
Input:
Output:
Current:
Package:
18-75V
15V
6.25A
Quarter-brick
Application Section
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.
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 / Lead Free Initiative web page
or e-mail us at rohs@synqor.com.
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)
t0t1t2
t
8ms (typical
turn on time)
ON ON ON
OFF OFF
Product # PQ40150QGx07 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QG157D Rev. C 11/27/12 Page 15
Input:
Output:
Current:
Package:
18-75V
15V
6.25A
Quarter-brick
Standards and Qualifications
Parameter Notes & Conditions
STANDARDS COMPLIANCE
UL 60950-1:2007 Basic insulation
CAN/CSA-C22.2 No. 60950-1:2007
EN60950-1/A12:2011
IEC 61000-4-2 ESD test, 8 kV - NP, 15 kV air - NP (Normal Performance)
Note: An external input fuse must always be used to meet these safety requirements. Contact SynQor for ofcial safety certicates on new
releases or download from the SynQor website.
Parameter # Units Test Conditions
QUALIFICATION TESTING
Life Test 32 95% rated Vin and load, units at derating point, 1000 hours
Vibration 5 10-55 Hz sweep, 0.060" total excursion, 1 min./sweep, 120 sweeps for 3 axis
Mechanical Shock 5 100g minimum, 2 drops in x, y and 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, 95% RH, 1000 hours, continuous Vin applied except 5 min/day
Solderability 15 pins MIL-STD-883, method 2003
Product # PQ40150QGx07 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QG157D Rev. C 11/27/12 Page 16
Input:
Output:
Current:
Package:
18-75V
15V
6.25A
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 / Lead Free
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
w 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.
Warranty
SynQor offers a three (3) year limited warranty. Complete warranty
information 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.
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
PATENTS
SynQor holds the following U.S. patents, one or more of which apply
to each product listed in this document. Additional patent applications
may be pending or led in the future.
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 7,558,083 7,564,702
7,765,687 7,787,261 8,023,290 8,149,597
PQ 40 150 Q G A 07 N R S
Product Family
Package Size
Performance Level
Thermal Design
Output Current
Options (see
Ordering Information)
Input Voltage
Output Voltage
Ordering Information
Model Number Input Voltage
Range
Output
Voltage
Max Output
Current
PQ40150QGw07xyz 18-75V 15V 6.67A
PQ40120QGw08xyz 18-75V 12 V 8.33 A
PQ40080QGw09xyz 18-75V 8.0 V 9.0A
PQ40050QGw20xyz 18-75V 5.0 V 20 A
PQ40033QGw25xyz 18-75V 3.3 V 25 A
Options Description: w x y z
Thermal Design Enable Logic Pin Style Feature Set
A - Open Frame
B - Baseplated
N - Negative
P - Positive
K - 0.110"
N - 0.145"
R - 0.180"
Y - 0.250"
S - Standard
Ordering Information