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. RoHS Compliant (see page 13).
Operational Features
• High efficiencies, 88% at full rated load current
• Delivers up to 35 A of output current with minimal derating
- no heatsink required
• Wide input voltage range: 35V – 75 V, with 100 V 100 ms
input voltage transient capability
• Fixed frequency switching provides predictable EMI
performance
• No minimum load requirement means no preload
resistors required
PQ60025ETL35 Module
Protection 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 load from
damaging voltages
• Thermal shutdown protects converter from abnormal
environmental conditions
Mechanical Features
• Industry standard Eighth-brick pin-out configuration
• Standard size: 0.90" x 2.3" (22.9x58.4 mm)
• Total height only 0.320" (8.13mm), permits better airflow
and smaller card pitch
• Total weight: 0.85 oz (24 g)
• Flanged pins designed to permit surface mount soldering
(avoid wave solder) using FPiP technique
Safety Features
• 2250 V, 30 MW input-to-output isolation
• UL 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 standard
• RoHS compliant (see last page)
Doc.# 005-2ET625F Rev. B
5/28/08
Page 1
Control 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
Product # PQ60025ETL35
Phone 1-888-567-9596
www.synqor.com
Technical Specification
MECHANICAL DIAGRAM
(58.4)
(50.8)
Input:
Output:
Current:
Package:
35V – 75 V
2.5 V
35 A
Eighth-brick
2.30
2.00
(11.43)
0.450
0.14
(3.6)
0.300
(7.62)
0.15
(3.8)
Top View
0.150
(3.81)
1
2
3
(15.24)
8
7
6
5
4
0.900 +0.022
(22.86 +0.55)
0.600
0.300
(7.62)
(15.24)
0.320 +0.015
(8.13 +0.38)
0.600
Overall Height
(3.68)
See Note 3
0.145
0.016 +0.015
(0.41 +0.38)
Side View
Lowest
Component
Load Board
Flanged Pin
See Note 10
Bottom Side Clearance
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) Recommended pin length is 0.03" (0.76mm) greater than the PCB
thickness. Other pin lengths available.
4) All Pins: Material - Copper Alloy; Finish - Matte Tin over Nickel plate
5) Undimensioned components shown are for visual reference only.
6) Weight: 0.85 oz. (24 g) typical
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) Workmanship: Meets or exceeds current 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 core shown at left above
is considered part of the input/primary circuit and that the two
ferrite cores shown at the right above are considered part of the
output/secondary 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.
NOTES
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
Product # PQ60025ETL35
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2ET625F Rev. B
5/28/08
Page 2
Technical Specification
PQ60025ETL35 Electrical Characteristics
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Non-Operating
Operating
35
Operating Transient Protection
Isolation Voltage
Input to Output
Operating Temperature
-40
Storage Temperature
-55
Voltage at ON/OFF input pin
-2
INPUT CHARACTERISTICS
Operating Input Voltage Range
35
Input Under-Voltage Lockout
Turn-On Voltage Threshold
31.5
Turn-Off Voltage Threshold
29.6
Lockout Voltage Hysteresis
1.9
Maximum Input Current
No-Load Input Current
0
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 CHARACTERISTICS
Output Voltage Set Point
2.475
Output Voltage Regulation
Over Line
Over Load
Over Temperature
Total Output Voltage Range
2.43
Output Voltage Ripple and Noise
1
Peak-to-Peak
RMS
Operating Output Current Range
0
Output DC Current-Limit Inception
40
Output DC Current-Limit Shutdown Voltage
Back-Drive Current Limit while Enabled
Back-Drive Current Limit while Disabled
Maximum Output Capacitance Electrolytic
Minimum Output Capacitance
Maximum Output Capacitance Ceramic
DYNAMIC CHARACTERISTICS
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 (0.3A/µs)
Settling Time
Turn-On Transient
Turn-On Time
6
Start-Up Inhibit Time
9
Restart Inhibit Time
190
Output Voltage Overshoot
EFFICIENCY
100% Load
50% Load
TEMPERATURE LIMITS FOR POWER DERATING CURVES
Semiconductor Junction Temperature
Board Temperature
Transformer Temperature
Input:
Output:
Current:
Package:
35V – 75 V
2.5 V
35 A
Eighth-brick
T
A
= 25 °C, airflow rate = 300 LFM, V
IN
= 48
V
DC
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.
Parameter
Min.
Typ.
48
32.6
30.6
2.0
46
6
7.5
1.9
75
47
2.500
+0.1 \ 2.5
+0.2 \ 5.0
+15
2.500
20
7
44
1.5
12
10
70
100
100
80
9
12
200
0
88
90
Max.
100
75
100
2250
100
125
18
75
33.7
31.6
2.1
3.0
75
10
0.01
20
1.0 \ 3.3
2.525
+38
2.57
50
50
35
48
50
33
5
12
17
210
125
125
125
Units Notes & Conditions
V
V
V
Vdc
°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
mF
mF
dB
mV
mV
µs
ms
ms
ms
%
%
%
°C
°C
°C
Continuous
Continuous
100 ms transient, square wave
Basic Insulation, Pollution Degree 2
100% Load, 35 Vin, nominal Vout
1000V/ms input transient
RMS thru 10 µH 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
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
Negative current drawn from output
Negative current drawn from output
2.5Vout at 35A Resistive Load
Not applicable
2.5Vout at 35A Resistive Load
120 Hz; Figure 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.; Figures 9 & 10
-40°C to +125°C; Figure F
-40°C to +125°C; Figure F
No 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
Note 1:
Output voltage ripple can exceed maximum specification during startup when output voltage is less than 1.2V. Additional output capacitance will mitigate this
startup ripple behavior. 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.
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.
ISOLATION CHARACTERISTICS
Isolation Voltage (dielectric strength)
Isolation Resistance
Isolation Capacitance
2
FEATURE CHARACTERISTICS
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
RELIABILITY CHARACTERISTICS
Parameter
Min.
317
-2
2.4
2.4
-2
-20
120
Typ.
2250
30
3300
333
10
148
120
10
2.42
2.27
Max.
350
0.8
18
18
0.8
5
+10
+10
160
Units Notes & Conditions
V
MΩ
pF
kHz
V
V
V
V
V
kΩ
%
%
%
°C
°C
Figures A & B
Measured across Pins 8 & 4; Figure C
Measured across Pins 8 & 4
Over full temp range; % of nominal Vout
Average PCB Temperature
Calculated MTBF (Telcordia)
TR-NWT-000332
Calculated MTBF (MIL-217)
MIL-HDBK-217F
Field Demonstrated MTBF
10
6
Hrs.
80% load,300LFM, 40oC Ta
10
6
Hrs.
80% load, 300LFM, 40oC Ta
10
6
Hrs. See our website for latest values
Note 1:
Output voltage ripple can exceed maximum specification during startup when output voltage is less than 1.2V. Additional output capacitance will mitigate this
startup ripple behavior. 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.
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