Technical Specification
Brick
Half
48Vin 5.0Vout 20A
20 Amp, No Heatsink, Isolated DC/DC Converter
The PQ48050HKA20 PowerQor
™
Kilo converter
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.
The Kilo series converters offer significant useable
output current in an economical standard “half-brick”
module. The Kilo units also feature active current shar-
ingfor N+1 and parallel applications.
PQ48050HKA20 Module
Operational Features
• Ultra-high efficiency, >88% at full rated load current
• Delivers up to 20 amps of output current with mini-
mal derating - no heatsink required
• Wide input voltage range: 35V – 75V meets or
exceeds all 48V bus standards
• Fixed frequency switching provides predictable EMI
performance
Protection Features
• Input under-voltage lockout and over-voltage
shutdown protects against abnormal input voltages
• Output current limit and short circuit protection
• Output over-voltage protection
• Thermal shutdown
Mechanical Features
• Industry standard pin-out configuration
• Industry standard size: 2.3” x 2.4”
• Total height only 0.40”, permits better airflow and
smaller card pitch
• Total weight: 1.8 oz. (51 grams)
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
(Full-Feature modules)
Active current share for N+1 and parallel applications
External Clock Synchronization pin for better EMI
characteristics
Startup Synchronization pin for more consistent start-
up sequence
ORing FET drive supply for efficient ORing protection
4/9/03
Page 1
Safety Features
• 2000V, 10 MΩ input-to-output isolation
• UL/cUL 60950 recognized (US & Canada), basic
insulation rating
• TUV certified to EN60950
• Meets 72/23/EEC and 93/68/EEC directives
• Meets UL94V-0 flammability requirements
Product # PQ48050HKA20
Phone 1-888-567-9596
Optional Features
•
•
•
•
Doc.# 005-2HK450G Rev. C
Technical Specification
Brick
MECHANICAL
DIAGRAM
2.30
0.19
(4.8)
Half
48Vin 5.0Vout 20A
1.90
(48.3)
(58.4)
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
0.40
(10.2)
0.034+/-0.026
(0.86+/-0.66)
Side View
Lowest
Component
Load Board
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: 1.8 oz. (51g) 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 consid-
ered part of the input/primary circuit.
PIN CONNECTIONS
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 # PQ48050HKA20
Phone 1-888-567-9596
Doc.# 005-2HK450G Rev. C
4/9/03
Page 2
Technical Specification
Brick
PQ48050HKA20 ELECTRICAL CHARACTERISTICS
Parameter
ABSOLUTE MAXIMUM RATINGS
Half
48Vin 5.0Vout 20A
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
78.3
75
2
0.03
TBD
3
33
4.95
1.6\4\3.3
47
5.00
75
34.4
32.4
2.4
79.5
3.3
95
5
Units
V
V
V
V
°C
°C
V
V
V
V
V
V
V
A
mA
mA
A
2
s
mV
mA
A
µF\µH\µF
µF
V
%\mV
%\mV
mV
V
mV
mV
A
A
V
%
A
mA
µF
dB
mV
mV
µs
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 Hysteresis Voltage
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
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
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
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
100% Load
50% Load
Semiconductor Junction Temperature
Board Temperature
Transformer Temperature
Isolation Voltage
Isolation Resistance
Isolation Capacitance
100% Load, 35 Vin
20
see Figure 13
1000V/ms input transient
RMS thru 10µH inductor; Figs. 13 & 15
fast blow external fuse recommended
internal values, see Figure E
OUTPUT CHARACTERISTICS
5.05
4.91
+0.05 \ 3 +0.1 \ 5
+0.1 \ 5 +0.2 \ 10
+15
+30
5.10
50
10
23
2.8
+2
1.0
10
80
100
100
300
100
20
20
25
+5
2.0
50
>50,000
0
21
0.5
0
over sample, line, load, temperature & life
20MHz bandwidth; Fig. 13 & 16
Full Load, see Figures 13 & 16
Full Load, see Figures 13 & 16
Output Voltage 10% Low; Fig. 17
% of rated output current
Max negative current drawn from output
Max negative current drawn from output
5.0Vout at 20A 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
180
20
200
0
88
89
30
215
ms
ms
%
%
%
EFFICIENCY
TEMPERATURE LIMITS FOR POWER DERATING CURVES
125
125
125
2000
10
3300
°C
°C
°C
V
M
Ω
pF
ISOLATION CHARACTERISTICS
Product # PQ48050HKA20
Phone 1-888-567-9596
Doc.# 005-2HK450G Rev. C
4/9/03
Page 3
Technical Specification
Brick
ELECTRICAL CHARACTERISTICS (Continued)
Parameter
P
FEATURE CHARACTERISTICS
Half
48Vin 5.0Vout 20A
Units
kHz
V
V
V
V
V
kΩ
%
%
%
°C
°C
Min.
205
-2
2.7
2.7
-2
Typ.
230
Max.
255
0.8
18
18
0.8
Notes & Conditions
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
Calculated MTBF (Telcordia)
Calculated MTBF (MIL-217)
Demonstrated MTBF
-20
114
Vin/6
42
120
120
10
2.4
1.9
>20
15
+13
+13
127
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
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. Field demonstrated MTBF
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
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
• An external input fuse must always be used to meet these safety requirements
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 more information about Proof of Design and Proof of Manufacturing processes.
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 # PQ48050HKA20
Phone 1-888-567-9596
PATENTS
SynQor is protected under various patents, including but not lim-
ited to U.S. Patent # 5,999,417.
Doc.# 005-2HK450G Rev. C
4/9/03
Page 4
Performance Curves
Brick
100
95
90
Half
94
93
48Vin 5.0Vout 20A
25 C
40 C
55 C
Efficiency (%)
85
80
75
70
65
60
0
2
4
6
8
10
12
14
16
18
20
36 Vin
48 Vin
75 Vin
Efficiency (%)
92
91
90
89
88
0
100
200
300
400
500
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 60% rated power 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
2
4
6
8
10
12
14
16
48 Vin
75 Vin
18
20
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 60% rated
power vs. airflow rate for ambient air temperatures of 25
°
C, 40
°
C, and
55
°
C (nominal input voltage).
20
18
16
14
I
out
(A)
12
10
8
6
4
2
0
0
25
40
55
o
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)
70
85
Ambient Air Temperature ( 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 # PQ48050HKA20
Phone 1-888-567-9596
Figure 6:
Thermal plot of converter at 20 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.# 005-2HK450G Rev. C
4/9/03
Page 5
Semiconductor junction temperature is
within 1°C of surface temperature
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