Technical
S pecification
PQ40033QGA25
18-75V
Input
3.3V
Output
25Amp
Current
2000Vdc
Isolation
Quar ter-brick
DC/DC Conver ter
The PQ400 33QGA25 PowerQor
™
Giga quarter-brick
converter is a next-generation, board-mountable, isolated,
fixed switching frequency DC/DC converter that uses syn-
chronous rectification to achieve extremely high conver-
sion 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 for
greater reliability. The PQ40 module offers a wide input
voltage range to cover both 24V and 48V applications.
RoHS Compliant (see page 12 ).
Operational Features
• High efficiency, 88.5% at full rated load current
• Delivers up to 25 amps of output current (82W) 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 per-
formance
• No minimum load requirement means no preload resis-
tors required
PQ40033QGA25 Module
Pr otection 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 conse-
quent hazardous conditions
• Active back bias limit prevents damage to converter
from external load induced pre-bias
• Output over-voltage protection protects load from dam-
aging voltages
• Thermal shutdown protects converter from abnormal
environmental conditions
Mechanical Features
• Industry standard quarter-brick pin-out configuration
• Industry standard size: 1.45” x 2.3” (36.8x58.4mm)
• Total height only 0.43” (10.9mm), permits better airflow
and smaller card pitch
• Total weight: 1.2 oz. (34 grams)
• Flanged pins designed to permit surface mount solder-
ing (avoid wave solder) using FPiP technique
Safety Features
• 2000V, 30 MΩ input-to-output isolation provides
input/output ground separation
• UL/cUL 60950-1 recognized (US & Canada), basic
insulation rating
• TUV certified to EN60950-1
• Meets 72/23/EEC and 93/68/EEC directives which
facilitates CE Marking in user’s end product
• Board and plastic components meet UL94V-0 flamma-
bility requirements
Contr ol 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 volt-
age margining
Product # PQ40033QGA25
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2QG333D Rev. B
05/05/06
Page 1
Technical Specification
MECHANICAL
DIAGRAM
0.14
(3.6)
Input:
Output:
Current:
Package:
2.30
(58.4)
18-75 V
3.3 V
25 A
Quarter-brick
0.600
(15.24)
0.450
(11.43)
2.00
(50.8)
0.300
(7.62)
0.150
(3.81)
0.43
(10.9)
1
0.600
(15.24)
8
7
6
5
4
1.45
(36.8)
2
3
0.300
(7.62)
Top View
Overall Height
Bottom side
Clearance
See Note 9
0.397 ±0.15
(10.8 ±0.38)
0.031 ±0.027
(0.79 ±0.68)
Side View
0.145
(3.68)
See Note 3
Lowest
Component
Load Board
Flanged Pin
See Note 10
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. Recommended pin
length is 0.03” (0.76mm) greater than the PCB thickness.
4) All Pins: Material - Copper Alloy
Finish (RoHS 5/6) - Tin/Lead over Nickel plate
Finish (RoHS 6/6) - 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: 1.2 oz. (34 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.
PIN DESIGNATIONS
Pin No.
1
2
3
4
5
6
7
8
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.
Name
Vin(+)
ON/OFF
Vin(-)
Vout(-)
SENSE(-)
TRIM
SENSE(+)
Vout(+)
Function
Positive input voltage
TTL input to turn converter
on and off, referenced to
Vin(-), with internal pull up.
Negative input voltage
Negative output voltage
Negative remote sense
1
Output voltage trim
2
Positive remote sense
3
Positive output voltage
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.
Product # PQ40033QGA25
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2QG333D Rev. B
05/05/06
Page 2
Technical Specification
PQ40033QGA25 ELECTRICAL CHARACTERISTICS
Parameter
ABSOLUTE MAXIMUM RATINGS
Input:
Output:
Current:
Package:
18-75 V
3.3 V
25 A
Quarter-brick
T
A
=25°C, airflow rate=300 LFM, V
in
=48Vdc unless otherwise noted; full operating temperature range is -40°C to +100°C ambient tem-
perature with appropriate power derating. Specifications subject to change without notice.
Min.
Typ.
Max.
100
80
100
2000
100
125
18
48
16.7
15.1
1.6
80
1.6
100
5
200
1.5\6.6
47
3.267
3.300
75
17.2
15.6
2.1
5.4
140
4
0.03
Units
V
V
V
V
°C
°C
V
V
V
V
V
A
mA
mA
A
2
s
mV
mA
mA
A
µH\µF
µF
V
%\mV
%\mV
mV
V
mV
mV
A
A
V
A
mA
µF
dB
mV
mV
µs
Notes & Conditions
Continuous
Continuous
100ms transient, square wave
Basic insulation, Pollution Degree 2
Input Voltage
Non-Operating
Operating
Operating Transient Protection
Isolation Voltage (input to output)
Operating Temperature
Storage Temperature
Voltage at ON/OFF input pin
Operating Input Voltage Range
Input Under-Voltage Lockout
Turn-On Voltage Threshold
Turn-Off Voltage Threshold
Lockout Voltage Hysteresis
Maximum Input Current
No-Load Input Current
Disabled Input Current
Inrush Current Transient Rating
Response to Input Transient
Input Reflected Ripple Current
Input Terminal Ripple Current
Recommended Input Fuse
Input Filter Component Values (L\C)
Recommended External Input Capacitance
Output Voltage Set Point
Output Voltage Regulation
Over Line
Over Load
Over Temperature
Total Output Voltage Range
Output Voltage Ripple and Noise
1
Peak-to-Peak
RMS
Operating Output Current Range
Output DC Current-Limit Inception
Output DC Current-Limit Shutdown Voltage
Back-Drive Current Limit while Enabled
Back-Drive Current Limit while Disabled
Maximum Output Capacitance
Input Voltage Ripple Rejection
Output Voltage During Load Current Transient
For a Step Change in Output Current (0.1A/µs)
For a Step Change in Output Current (5A/µs)
Settling Time
Turn-On Transient
Turn-On Time
Start-Up Inhibit Time
Output Voltage Overshoot
-40
-55
-2
18
16.2
14.6
1.1
INPUT CHARACTERISTICS
100% Load, 18 Vin
20
1000V/ms input transient, 18V-48V step
P-P thru 10µH inductor; Figures 17 & 19
RMS; Figures 17 & 18
Fast blow external fuse recommended
Internal values; see Figure E
Typical ESR 0.1-0.2Ω; see Figure 17
OUTPUT CHARACTERISTICS
3.333
3.207
+0.05 \ 2 +0.15 \ 5
+0.05 \ 2 +0.15 \ 5
+17
+50
3.393
50
10
29
1.9
0.8
10
55
100
100
400
100
20
25
31
1.5
50
20,000
0
26
0.2
0
Over sample, line, load, temperature & life
20MHz bandwidth; Figures 17 & 20
Full Load; see Figures 17 & 20
Full Load; see Figures 17 & 20
Subject to thermal derating; Figures 5 - 12
Output Voltage 10% Low; Figure 21
Negative current drawn from output
Negative current drawn from output
3.3Vout at 25A Resistive Load
120 Hz; Figure 24
50% to 75% to 50% Iout max; Figure 15
50% to 75% to 50% Iout max; Figure 16
To within 1% Vout nom
Full load, Vout=90% nom.; Figures 13 & 14
-40°C to +125°C; Figure F
20,000 µF load capacitance, Iout = 0A
Figures
Figures
Figures
Figures
1
1
1
1
-
-
-
-
4,
4,
4,
4,
24Vin
24Vin
48Vin
48Vin
DYNAMIC CHARACTERISTICS
180
12
200
0
88.5
90.0
87.5
89.0
14
240
ms
ms
%
%
%
%
%
EFFICIENCY
100% Load (24Vin)
50% Load (24Vin)
100% Load (48Vin)
50% Load (48Vin)
Semiconductor Junction Temperature
Board Temperature
Transformer Temperature
Isolation Voltage (dielectric strength)
Isolation Resistance
Isolation Capacitance
2
TEMPERATURE LIMITS FOR POWER DERATING CURVES
125
125
125
2000
30
470
°C
°C
°C
V
M
Ω
pF
Package rated to 150°C
UL rated max operating temp 130°C
See Figures 5 - 12 for derating curves
ISOLATION CHARACTERISTICS
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 # PQ40033QGA25
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2QG333D Rev. B
05/05/06
Page 3
Technical Specification
ELECTRICAL CHARACTERISTICS (Continued)
Parameter
P
FEATURE CHARACTERISTICS
Input:
Output:
Current:
Package:
18-75 V
3.3 V
25 A
Quarter-brick
Min.
200
-2
2.4
2.4
-2
Typ.
225
Max.
250
0.8
18
18
0.8
Units
kHz
V
V
V
V
V
kΩ
%
%
%
°C
°C
Notes & Conditions
Regulation stage and Isolation stage
Switching Frequency
ON/OFF Control (Option P)
Off-State Voltage
On-State Voltage
ON/OFF Control (Option N)
Off-State Voltage
On-State Voltage
ON/OFF Control (Either Option)
Pull-Up Voltage
Pull-Up Resistance
Output Voltage Trim Range
Output Voltage Remote Sense Range
Output Over-Voltage Protection
Over-Temperature Shutdown
Over-Temperature Shutdown Restart Hysteresis
Load Current Scale Factor
Calculated MTBF (Telcordia)
Calculated MTBF (MIL-217)
Field Demonstrated MTBF
-10
117
Vin/4.25
40
122
125
10
1500
2.5
1.6
17.7
+10
+10
127
Figures A & B
Measured across Pins 8 & 4; Figures 27 & C
Measured across Pins 8 & 4; Figure 27
Over full temp range; % of nominal Vout
Average PCB Temperature
RELIABILITY CHARACTERISTICS
10
6
Hrs.
TR-NWT-000332; 80% load,300LFM, 40oC Ta
10
6
Hrs.
MIL-HDBK-217F; 80% load, 300LFM, 40oC Ta
10
6
Hrs. See our website for details
STANDARDS COMPLIANCE
Parameter
P
STANDARDS COMPLIANCE
Notes
File # E194341, Basic insulation & pollution degree 2
Certified by TUV
Test on entire assembly; board & plastic components UL94V-0 compliant
ESD test, 8kV - NP, 15kV air - NP (Normal Performance)
Section 7 - electrical safety, Section 9 - bonding/grounding
UL/cUL 60950-1
EN60950-1
72/23/EEC
93/68/EEC
Needle Flame Test (IEC 695-2-2)
IEC 61000-4-2
GR-1089-CORE
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.
QUALIFICATION TESTING
Parameter
P
QUALIFICATION TESTING
# Units
32
5
5
10
5
5
5
15 pins
Test Conditions
10-55Hz sweep, 0.060” total excursion,1 min./sweep, 120 sweeps for 3 axis
Life Test
Vibration
Mechanical Shock
Temperature Cycling
Power/Thermal Cycling
Design Marginality
Humidity
Solderability
95% rated V
in
and load, units at derating point, 1000 hours
100g minimum, 2 drops in x and y axis, 1 drop in z axis
-40°C to 100°C, unit temp. ramp 15°C/min., 500 cycles
T
operating
= min to max, V
in
= min to max, full load, 100 cycles
T
min
-10°C to T
max
+10°C, 5°C steps, V
in
= min to max, 0-105% load
85°C, 85% RH, 1000 hours, 2 minutes on and 6 hours off
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.
OPTIONS
SynQor provides various options for Logic Sense, Pin Length and
Feature Set for this family of DC/DC converters. Please consult the
last page for information on available options.
Product # PQ40033QGA25
Phone 1-888-567-9596
PATENTS
SynQor is protected under various patents, including but not limit-
ed to U.S. Patent #s 5,999,417; 6,222,742 B1; 6,594,159 B2;
6,545,890 B2.
Doc.# 005-2QG333D Rev. B
05/05/06
Page 4
www.synqor.com
Technical Specification
95
90
85
91
Input:
Output:
Current:
Package:
18-75 V
3.3 V
25 A
Quarter-brick
90
Efficiency (%)
80
75
70
24 Vin
65
60
0
5
10
15
20
25
48 Vin
75 Vin
Efficiency
(%)
89
88
87
86
25 C
40 C
55 C
0
100
200
300
400
500
85
Load Current (A)
Air Flow
(LFM)
Figure 1:
Efficiency at nominal output voltage vs. load current for 24V,
48V and 75V input 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 (48V
input).
8
14
12
Power Dissipation (W)
Power Dissipation (W)
10
8
6
4
2
0
0
5
10
15
20
25
7
6
24 Vin
48 Vin
75 Vin
5
25 C
40 C
55 C
0
100
200
300
400
500
4
Air Flow (LFM)
Load Current (A)
Figure 3:
Power dissipation at nominal output voltage vs. load current
for 24V, 48V and 75V input 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 (48V input).
25
20
I
out
(A)
15
10
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
5
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
50 LFM (0.25 m/s)
0
0
25
40
55
o
70
85
Ambient Air Temperature ( C)
Semiconductor junction temperature is
within 1°C of surface temperature
Figure 5:
Maximum output power derating curves vs. ambient air tem-
perature for airflow rates of 50 LFM through 400 LFM with air flowing
across the converter from pin 3 to pin 1 (24V input).
Product # PQ40033QGA25
Phone 1-888-567-9596
Figure 6:
Thermal plot of converter at 25 amp load current with 55
°
C
air flowing at the rate of 200 LFM. Air is flowing across the converter
from pin 3 to pin 1 (24V input).
Doc.# 005-2QG333D Rev. B
05/05/06
Page 5
www.synqor.com
