Technical
Specification
PQ60025EKx20
48V
Input
2.5V
Output
20A
Current
2000V dc
Isolation
Eighth-brick
DC-DC Converter
The PowerQor
®
Eighth-brick converter series is composed
of next-generation, board-mountable, isolated, fixed
switching frequency dc-dc converters that use synchronous
rectification to achieve extremely high power 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 15).
Operational Features
• High efficiency, 86% at full load
• Delivers up to 20A of output current (50W) with minimal derating- no
heatsink required
• Wide input voltage range: 35V–75V, with 100V,100ms input voltage
transient capability
• Fixed frequency switching provides predictable EMI performance
• No minimum load requirement means no preload resistors required
PQ60025EKA20
Module
Control Features
Mechanical Features
• Industry standard eighth-brick pin-out configuration
• Industry standard size: 0.90”x2.3” (22.9x58.4mm)
• Total height only 0.320” (8.13mm), permits better airflow and
smaller card pitch
• Total weight: 0.85oz. (24 grams)
• Flanged pins designed to permit surface mount soldering
(avoid wave solder) using FPiP technique
• 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
Safety Features
• 2000V, 30MΩ input-to-output isolation provides input/output
ground separation
• UL 60950-1 recognized (US & Canada),basic insulation rating
• TUV certified to EN60950-1
• Board and plastic components meet UL94V-0 flammability
requirements
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
Product # PQ60025EKx20
Phone 1-888-567-9596
CONTENTS
Mechanical Drawing - Open frame - EKA & EKL (low Profile) . . . . . . . . .2
Mechanical Drawing - Encased . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
PQ60025EKA20 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . 4-5
PQ60025EKx20 Standards & Qualification Testing . . . . . . . . . . . . . . . . .6
PQ60025EKx20 Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-10
Application Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-14
Ordering Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Page No.
www.synqor.com
Doc.# 005-0005112 Rev. C
06/12/09
Page 1
Technical Specification
Input:
Output:
Current:
Part No.:
35-75V
2.5V
20A
PQ60025EKx20
MECHANICAL DRAWING - OPEN FRAME - EKA & EKL (LOW PROFILE)
.900 (22.86)
0.600 (15.24)
0.450 (11.43)
0.300 (7.62)
0.150 (3.81)
0.410 ± 0.014
(10.41 ± 0.35)
Overall Height
0.340 ± 0.014
(8.64 ± 0.35)
Overall Height
8
7
6
5
4
0.145 (3.68)
0.145 (3.68)
2.30
(58.4)
2.00
(50.8)
Top View
Side View
1
.14 (3.6)
2
3
0.121±.017
(3.07±0.43)
Bottom Side Clearance
0.051±.017
(1.3±0.43)
Bottom Side Clearance
0.150 (3.8)
0.300 (7.62)
0.600 (15.24)
EKA
Side View
EKL
Side View
NOTES
1)
Pins 1-3, 5-7 are 0.040” (1.02mm) diameter, with 0.080” (2.03mm)
diameter standoff shoulders.
2)
Pins 4 and 8 are 0.062” (1.57 mm) diameter with 0.100" (2.54 mm)
diameter standoff shoulders.
PIN DESIGNATIONS
Pin
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.
Doc.# 005-0005112 Rev. C
06/12/09
Page 2
Name
Vin(+)
ON/OFF
Vin(–)
Vout(–)
SENSE(–)
TRIM
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 output voltage
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 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: 0.85 oz (24 g) typical
8)
Workmanship: Meets or exceeds IPC-A-610C Class II
9)
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.
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 core shown at left above is considered
part of the input/primary circuit.
SENSE(+)
Positive remote sense
3
Product # PQ60025EKx20
Phone 1-888-567-9596
www.synqor.com
Technical Specification
MECHANICAL DRAWING - ENCASED
.986±0.020 (25.04±0.5)
0.600 (15.24)
0.450 (11.43)
0.300 (7.62)
0.150 (3.81)
Input:
Output:
Current:
Part No.:
35-75V
2.5V
20A
PQ60025EKC20
0.500 ± 0.025
(12.7 ± 0.63)
Overall Height
8
7
6
5
4
2.386±0.020
(60.6±0.5)
Top View
2.00
(50.8)
Side View
0.183±0.020
(4.65±0.5)
1
2
3
0.193±0.020 (4.9±0.5)
0.300 (7.62)
0.600 (15.24)
0.180±.010
(4.57±0.25)
NOTES
1)
2)
3)
4)
5)
6)
7)
8)
9)
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)
diameter standoff shoulders.
Other pin extension lengths available. Recommended pin length is
0.03” (0.76mm) greater than the PCB thickness.
All Pins: Material - Copper Alloy- Finish (RoHS 6/6) - Matte Tin over
Nickel plate
Undimensioned components are shown for visual reference only.
All dimensions in inches (mm) Tolerances: x.xx +/-0.02 in. (x.x
+/-0.5mm) x.xxx +/-0.010 in. (x.xx +/-0.25mm)
Weight: 5 oz (142 g) typical
Workmanship: Meets or exceeds IPC-A-610C Class II
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
Pin
1
2
3
4
5
6
7
8
Name
Vin(+)
ON/OFF
Vin(–)
Vout(–)
TRIM
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
Output voltage trim
2
Positive output voltage
SENSE(–)
Negative remote sense
1
SENSE(+)
Positive remote sense
3
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.
Doc.# 005-0005112 Rev. C
06/12/09
Page 3
Product # PQ60025EKx20
Phone 1-888-567-9596
www.synqor.com
Technical Specification
PQ60025EKA20 Electrical Characteristics
Input:
Output:
Current:
Part No.:
35-75V
2.5V
20A
PQ60025EKx20
Ta = 25°C, airflow rate = 300 LFM, Vin = 48Vdc unless otherwise noted; full operating temperature range is -40°C to +100°C baseplate temperature
with appropriate power derating. Specifications subject to change without notice.
Parameter
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Non-Operating
Operating
Operating Transient Protection
Isolation Voltage
Input to Output
Operating Temperature
Storage Temperature
Voltage at ON/OFF input pin
INPUT CHARACTERISTICS
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
Recommended External Input Capacitance
Input Filter Component Values (L\C)
OUTPUT CHARACTERISTICS
Output Voltage Set Point
Output Voltage Regulation
Over Line
Over Load
Over Temperature
Total Output Voltage Range
Output Voltage Ripple and Noise
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 Electrolytic
EFFICIENCY
100% Load
50% Load
Min.
Typ.
Max.
Units Notes & Conditions
100
75
100
2000
-40
-55
0
35
33.0
31.5
1.2
48
34.0
32.3
1.7
47
9.8
80
1.8
65
20
47
1\2.35
2.475
2.50
±0.1\2.5
±0.15\3.75
2.450
±10
2.500
50
17
0
24.5
4.5
26.6
2.25
7
1.1
20
29.0
12.5
7
86
86
2.550
2.525
10.5
0.03
100
125
13.5
75
35.0
33.5
2.2
1.7
V
V
V
V dc
°C
°C
V
V
V
V
V
A
mA
mA
A2s
mV
mA
mA
A
µF
µH\µF
V
%\mV
%\mV
mV
V
mV
mV
A
A
V
A
mA
mF
%
%
Continuous
Continuous
100ms transient, square wave
Basic Insulation
See Note 1
100% Load, 35V Vin, nominal Vout
1000V/ms input transient
RMS thru 10μH inductor; Figures 13 & 15
RMS; Figures 13 & 14
Fast acting external fuse recommended
Typical ESR 0.1-0.2Ω; Figure 13
Internal values; see Figure E
Over sample, line, load, temperature & life
20MHz bandwidth; see Note 2
Full load; see Figures 13 & 16
Full load; see Figures 13 & 16
Subject to thermal derating; Figures 5 - 8
Negative current drawn from output
Negative current drawn from output
Nominal Vout at full load (resistive load)
Figures 1 - 4
Figures 1 - 4
Product # PQ60025EKx20
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005112 Rev. C
06/12/09
Page 4
Technical Specification
Input:
Output:
Current:
Part No.:
35-75V
2.5V
20A
PQ60025EKx20
PQ60025EKA20 Electrical Characteristics (continued)
Ta = 25 °C, airflow 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. Specifications subject to change without notice.
Parameter
DYNAMIC CHARACTERISTICS
Input Voltage Ripple Rejection
Output Voltage during Load Current Transient
Step Change in Output Current (0.1A/µs)
Step Change in Output Current (5A/µs)
settling time
Turn-On Transient
Turn-On Time
Start-Up Inhibit Time
Output Voltage Overshoot
ISOLATION CHARACTERISTICS
Isolation Voltage (dielectric strength)
Isolation Resistance
Min.
Typ.
87
250
200
700
21
200
0
2000
30
1000
Max.
Units Notes & Conditions
dB
mV
mV
µs
ms
ms
%
V
MΩ
pF
See Note 4
Package rated to 150°C
UL rated max operating temp 130°C
120Hz
See Note 3
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.
-40°C to +125°C; Figure F
Maximum Output Capacitance
See Absolute Maximum Ratings
180
240
Isolation Capacitance (input to output)
TEMPERATURE LIMITS FOR POWER DERATING CURVES
Semiconductor Junction Temperature
Board Temperature
Transformer Temperature
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
Calculated MTBF (Telcordia)
Calculated MTBF (MIL-217)
Field Demonstrated MTBF
-10
125
2
0
0
2
270
125
125
125
300
330
0.8
13.5
13.5
0.8
5
10
10
138
125
10
2.5
1.1
10
148
6
°C
°C
°C
kHz
V
V
V
V
Application notes; Figures A & B
V
kΩ
%
%
%
°C
°C
106 Hrs.
TR-NWT-000332; 80% load, 300LFM, 40°C Ta
106 Hrs.
MIL-HDBK-217F; 80% load, 300LFM, 40°C Ta
106 Hrs. See our website for details
Measured across Pins 8 & 4; Figure C
Measured across Pins 8 & 4
Over Full Temperature Range; % of nominial Vout
Average PCB Temperature
Note 1: The UVLO values represented here are typical of lighter load conditions. The unit may shut down under high load conditions before the typical
UVLO limits.
Note 2: For applications requiring reduced output voltage ripple and noise, consult SynQor applications support (e-mail: support@synqor.com)
Note 3: The module requires a minimum amount of capacitance (100μF) in order to ride through a No Load to Full Load transient (0.1A/μs) without
shutdown.
Note 4: Higher values of isolation capacitance can be added external to the module.
Product # PQ60025EKx20
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005112 Rev. C
06/12/09
Page 5
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