Technical
S pecification
PQ48033HTA38
48V in
Input
3.3Vout
Output
38Amp
Current
2000Vdc
Isolation
Half-brick
DC/DC Conver ter
The PQ48033HTA38 PowerQor
™
Tera half-brick converter
b
is a next-generation, board-mountable, isolated, fixed switch -
g
m
ing frequency DC/DC converter that uses synchronous recti -
fication 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 appli -
cation effort. The Tera series converters offer the maximum
useable output current for a standard “half-brick” module.
b
The Tera units also feature active current sharing for N+1
and parallel applications. This modified standard version
has a reduced current limit for lower power applications.
Operational Features
• Ultra-high efficiency, 91.5% at full rated load current
• Delivers up to 38 amps of output current with minimal
derating - no heatsink required
• Wide input voltage range: 35V – 75V meets or
exceeds all 48V bus standards
• Fixed frequency switching provides predictable EMI
performance
PQ48033HTA38 Module
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 voltage
margining
Mechanical Features
• Industry standard half-brick pin-out configuration
• Industry standard size: 2.3” x 2.4” (58.4 x 61.0mm)
• Total height only 0.43” (11.2mm), permits better air-
flow and smaller card pitch
• Total weight: 2.6 oz. (75 grams)
Safety Features
• 2000V, 30 M
Ω
input-to-output isolation
• UL 60950 recognized (US & Canada), basic insula-
tion rating
• TUV certified to EN60950
• Meets 72/23/EEC and 93/68/EEC directives
• Meets UL94V-0 flammability requirements
Pr otection Features
• Input under-voltage lockout and over-voltage shutdown
protects against abnormal input voltages
• Output current limit and short circuit protection
• Active back bias limit prevents damage to converter
from external load induced pre-bias
• Output over-voltage protection
• Thermal shutdown
Product # PQ48033HTA38
Phone 1-888-567-9596
www.synqor.com
Optional Features
(full-feature)
• Active current share for N+1 and parallel applications
• External Clock Synchronization pin for better EMI char-
acteristics
• Startup Synchronization pin for more consistent start-up
sequence
• ORing FET drive supply for efficient ORing protection
Doc.# 005-2UT433F Rev. A
12/03/04
Page 1
Technical Specification
MECHANICAL
DIAGRAM
2.30
0.19
(4.8)
(58.4)
Input:
Output:
Current:
Package:
35-75 V
3.3 V
38 A
Half-brick
1.90
(48.3)
0.50
(12.7)
0.300
(7.62)
0.400
(10.16)
0.400
(10.16)
0.700
(17.78)
1.000
(25.40)
0.200
(5.08)
1.400
(35.56)
Top View
0.200
(5.08)
1.000
(25.40)
2.40
(61.0)
1.400
(35.56)
Max. Height
Bottom side
Clearance
See Note 10
0.43
(11.2)
0.037+/-0.029
(0.94+/-0.74)
Lowest
Component
Load Board
Side View
0.145
(3.68)
See Note 4
NOTES
1) Pins 1-4, 6-8, A-C are 0.040” (1.02mm) diameter with
0.080” (2.03mm) diameter standoff shoulders.
2) Pins 5 and 9 are 0.080” (2.03 mm) diameter with 0.125”
(3.18mm) diameter standoff shoulders.
3) Pins 3, A, B & C only included in Full-Feature models.
4) Other pin extension lengths available. Recommended pin
length is 0.03” (0.76mm) greater than the PCB thickness.
5) All Pins: Material - Copper Alloy
Finish - Tin/Lead over Nickel plate
6) Undimensioned components are shown for visual reference
only.
7) All dimensions in inches (mm)
Tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm)
x.xxx +/-0.010 in. (x.xx +/-0.25mm)
8) Weight: 2.6 oz. (75g) typical
9) Workmanship: Meets or exceeds IPC-A-610C Class II
10)
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. Name
1
2
Vin(+)
ON/OFF
Function
Positive input voltage
TTL input to turn converter
on and off, referenced to
Vin(-), with internal pull up.
3
4
5
6
7
8
9
A
B
C
I share
Vin(-)
Vout(-)
SENSE(-)
TRIM
SENSE(+)
Vout(+)
Clock Sync
Start Sync
OR Drive
Single wire parallel signal
Negative input voltage
Negative output voltage
Return remote sense
Output voltage trim
Positive remote sense
Positive output voltage
Clock synchronization
Startup synchronization
External OR-FET drive
Pins in Italics Shaded text are Optional
Product # PQ48033HTA38
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2UT433F Rev. A
12/03/04
Page 2
Technical Specification
PQ48033HTA38 ELECTRICAL CHARACTERISTICS
Parameter
ABSOLUTE MAXIMUM RATINGS
Input:
Output:
Current:
Package:
35-75 V
3.3 V
38 A
Half-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
temperature with appropriate power derating. Specifications subject to change without notice.
Min.
Typ.
Max.
100
80
100
2000
100
125
18
18
48
33.3
31.0
2.3
78.2
60
2
150
5
100
1.6\4\3.3
47
3.27
3.30
+0.05 \ 2
+0.1 \ 3
+15
50
10
44
1.7
+2
1.5
10
90
100
100
300
180
20
200
0
91.5
92.4
125
125
125
2000
30
3300
30
240
75
34.4
32.4
2.4
79.5
4.1
85
5
0.03
Units
V
V
V
V
°C
°C
V
V
V
V
V
V
V
A
mA
mA
A
2
s
mV
mA
mA
A
µF\µH\µF
µF
V
%\mV
%\mV
mV
V
mV
mV
A
A
V
%
A
mA
µF
dB
mV
mV
µs
ms
ms
%
%
%
°C
°C
°C
V
M
Ω
pF
Notes & Conditions
continuous
continuous
< 10µs
Basic insulation level, 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
Voltage at Clock Sync pin
-40
-55
-2
-15
35
31.5
29.5
2.2
76.7
applies to Full Feature option only
INPUT CHARACTERISTICS
Operating Input Voltage Range
Input Under-Voltage Lockout
Turn-On Voltage Threshold
Turn-Off Voltage Threshold
Lockout Voltage Hysteresis
Input Over-Voltage Shutdown
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 (C
1
\L\C
2
)
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
Current Share Accuracy (2 units paralleled)
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
100% Load
50% Load
Semiconductor Junction Temperature
Board Temperature
Transformer Temperature
Isolation Voltage (dielectric strength)
Isolation Resistance
Isolation Capacitance
2
100% Load, 35 Vin
20
1000V/ms input transient
RMS thru 10µH inductor; Figures 13 & 15
RMS; Figures 13 & 14
fast blow external fuse recommended
internal values, see Figure E
Typical ESR 0.1-0.2
Ω
, see Figure 13
OUTPUT CHARACTERISTICS
3.33
+0.1 \ 3
+0.2 \ 7
+30
3.37
100
20
38
48
+5
2.5
50
50,000
3.23
0
40
0.5
0
over sample, line, load, temperature & life
20MHz bandwidth; Figures 13 & 16
Full Load, see Figures 13 & 16
Full Load, see Figures 13 & 16
Subject to thermal derating; Figures 5-8
Output Voltage 10% Low; Fig. 17
% of rated output current
Negative current drawn from output
Negative current drawn from output
3.3Vout at 38A Resistive Load
120 Hz; Fig. 20
50% to 75% to 50% Iout max; Figure 11
50% to 75% to 50% Iout max; Figure 12
to within 1% Vout nom
Full load, Vout=90% nom.; Figs. 9 & 10
-40°C to +125°C; Figure A
10,000 µF load capacitance, Iout = 0A
Figures 1 - 4
Figures 1 - 4
Package rated to 150°C
UL rated max operating temp 130°C
See Figures 5 - 8 for derating curves
DYNAMIC CHARACTERISTICS
EFFICIENCY
TEMPERATURE LIMITS FOR POWER 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 # PQ48033HTA38
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2UT433F Rev. A
12/03/04
Page 3
Technical Specification
ELECTRICAL CHARACTERISTICS (Continued)
Parameter
P
FEATURE CHARACTERISTICS
Input:
Output:
Current:
Package:
35-75 V
3.3 V
38 A
Half-brick
Min.
220
-2
2.7
2.7
-2
Typ.
245
122.5
Max.
275
0.8
18
18
0.8
Units
kHz
kHz
V
V
V
V
V
kΩ
%
%
%
°C
°C
Notes & Conditions
Regualtion Stage Switching Frequency
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
-20
111
Vin/6
42
117
120
10
1067
2.2
1.3
15
+10
+10
125
Figures A, B
Measured across Pins 9 & 5; Figure C
Measured across Pins 9 & 5
Over full temp range; % of nominal Vout
Average PCB Temperature
See App Note: Output Load Current Calc.
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 website for latest values
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
EN60950
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 factory for official product family qualification document.
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 of this specification sheet for information on available
options.
Product # PQ48033HTA38
Phone 1-888-567-9596
PATENTS
SynQor is protected under various patents, including but not lim-
ited to U.S. Patent #s 5,999,417; 6,222,742 B1; 6,594,159
B2; 6,545,890 B2.
www.synqor.com
Doc.# 005-2UT433F Rev. A
12/03/04
Page 4
Technical Specification
100
95
93
94
Input:
Output:
Current:
Package:
35-75 V
3.3 V
38 A
Half-brick
90
Efficiency (%)
80
75
70
65
60
0
5
10
15
20
25
30
35
40
36 Vin
48 Vin
75 Vin
Efficiency
(%)
85
92
91
90
89
25 C
40 C
55 C
0
100
200
300
400
500
88
Load Current (A)
Air Flow
(LFM)
Figure 1:
Efficiency at nominal output voltage vs. load current for min-
imum, nominal, and maximum input voltage at 25
°
C.
Figure 2:
Efficiency at nominal output voltage and 79% rated power
(30A) vs. airflow rate for ambient air temperatures of 25
°
C, 40
°
C, and
55
°
C (nominal input voltage).
12.0
11.0
Power Dissipation (W)
14
12
Power Dissipation (W)
10
8
6
4
10.0
9.0
8.0
7.0
6.0
5.0
4.0
25 C
40 C
55 C
36 Vin
2
0
0
5
10
15
20
25
30
48 Vin
75 Vin
35
40
0
100
200
300
400
500
Load Current (A)
Air Flow (LFM)
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 79% rated
power (30A) vs. airflow rate for ambient air temperatures of 25
°
C,
40
°
C, and 55
°
C (nominal input voltage).
40
35
30
25
20
15
10
5
0
0
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
0 LFM (0 m/s)
25
40
55
70
85
Ambient Air Temperature (
o
C)
Figure 5:
Maximum output power derating curves vs. ambient air tem-
perature for airflow rates of 0 LFM through 400 LFM with air flowing
from input to output (nominal input voltage).
Product # PQ48033HTA38
Phone 1-888-567-9596
Figure 6:
Thermal plot of converter at 38 amp load current with 55
°
C
air flowing at the rate of 200 LFM. Air is flowing across the converter
from input to output (nominal input voltage).
Doc.# 005-2UT433F Rev. A
12/03/04
Page 5
www.synqor.com
Semiconductor junction temperature
is within 1°C of surface temperature
I
out
(A)
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