BQ55090QPA40
35-55V
Continuous Input
Technical
Specification
Quarter-brick
DC-DC Converter
®
9.6V
Output
43A
Current
2000V dc
The BusQor BQ55090QPA40 bus 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 BusQor
series provides an isolated step down voltage from 48V
to 12 or 9.6V intermediate bus with no regulation in
a standard “quarter-brick” module. BusQor converters
are ideal for creating the mid-bus voltage required
to drive point-of-load (non-isolated) converters in
intermediate bus architectures.
Bus
Isolation
Bus
Converter
Operational Features
• High efficiency, 96.5% at full rated load current
• Delivers full power with minimal derating - no heatsink required
• Operating input voltage range: 35-55V
• Fixed frequency switching provides predictable EMI
• No minimum load requirement
BQ55090QPA40 Module
Protection Features
• Input under-voltage lockout and over-voltage shutdown protects
against abnormal input voltages
• Output current limit and short circuit protection (auto recovery)
• Thermal shutdown
Mechanical Features
• Industry standard quarter-brick pin-out configuration
• Size: 1.45” x 2.3” (36.8x58.4mm)
• Total height: 0.445” (11.3mm)
• Total weight: 1.5 oz (42 g)
Safety Features
•
•
•
•
UL 60950-1:2007
EN60950-1/A11:2009/A1:2010
CAN/CSA-C22.2 No. 60950-1:2007
IEC 61000-4-2
Control Features
• On/Off control referenced to input side
• Inherent current share (by droop method) for high current and
parallel applications.
Product # BQ55090QPA40
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2BQ559K Rev. C
12/09/10
Page 1
Technical Specification
MECHANICAL DIAGRAM
Input:35-55V
Output:9.6V
Current:43A
Part No.:BQ55090QPx40
NOTES
1)
2)
3)
4)
5)
6)
Pins 1-3 are 0.040” (1.02mm) diameter with 0.080” (2.03 mm)
diameter standoff shoulders.
Pins 4-5 are 0.062” (1.57 mm) diameter with 0.100” (2.54 mm)
diameter standoff shoulders.
Other pin lengths available. Recommended pin length is 0.03”
(0.76mm) greater than the PCB thickness.
All Pins: Material - Copper Alloy
Finish: 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)
Pin
1
2
3
4
5
Name
Vin(+)
ON/OFF
Vin(–)
Vout(–)
Vout(+)
PIN DESIGNATIONS
Function
Positive input voltage
Logic control input to turn converter on and off.
Negative input
Negative output
Positive output
7)
8)
9)
Weight: 1.5 oz (42 g) typical
Workmanship: Meets or exceeds IPC-A-610C Class II
UL/TUV standards require a clearance of 0.04” (1.02mm) around
primary areas of the module.
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 # BQ55090QPA40
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2BQ559K Rev. C
12/09/10
Page 2
Technical Specification
BQ55090QPx40 Electrical Characteristics
Input:35-55V
Output:9.6V
Current:43A
Part No.:BQ55090QPx40
Ta = 25 °C, airflow rate = 300 LFM, Vin = 48V 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
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
Input Over-Voltage Shutdown
Turn-On Voltage Threshold
Turn-Off Voltage Threshold
Maximum Input Current
No-Load Input Current
Disabled Input Current
Input Reflected-Ripple Current
Input Terminal-Ripple Current
Recommended Input Fuse (see Note 1)
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 Disabled
Maximum Output Capacitance
Min.
0
35
Typ.
Max.
60
55
N/A
2000
100
125
18
Units Notes & Conditions
V
V
V
V
°C
°C
V
V
V
V
V
V
V
V
A
mA
mA
mA
mA
A
µF
µH\µF
V
%\V
%\mV
%\mV
V
mV
mV
A
A
V
mA
µF
Continuous
Continuous
48
-40
-55
-2
35
48
33.5
31.1
2.4
56.2
59.2
55
15.0
10
140
47
0.22\11
9.6
42\4.0
5.2\500
2\200
6.500
50
20
0
50
5
10
9.5
130
30.0
20
20
RMS through 10µH inductor
RMS, full load
Fast blow external fuse recommended
Typical ESR 0.1-0.2 Ω
Internal values; see Figure E
11.000
90
43
Over sample, line, load, temperature & life
20 MHz bandwidth; see Note 2
Full load
Full load
Subject to thermal derating
3,000
Negative current drawn from output
9.6Vout at 20 A Resistive Load
Product # BQ55090QPA40
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2BQ559K Rev. C
12/09/10
Page 3
Technical Specification
Input:35-55V
Output:9.6V
Current:43A
Part No.:BQ55090QPx40
BQ55090QPx40 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 ambient temperature
with appropriate power derating. Specifications subject to change without notice.
Parameter
Min.
Typ.
200
100
8
200
0
2000
30
470
Max.
Units Notes & Conditions
mV
µs
50% to 75% to 50% Iout max
To within 1% Vout nom
Half load resistive, Vout=90% nom.
-40 °C to +125 °C; Figure F
3 mF load capacitance
See Absolute Maximum Ratings
See Note 3
Package rated to 150 °C
UL rated max operating temp 130 °C
DYNAMIC CHARACTERISTICS
Output Voltage during Load Current Transient
Step Change in Output Current (0.1 A/µs)
Settling Time
Turn-On Transient
Turn-On Time (with 3mF output capacitance)
Start-Up Inhibit Time
Output Voltage Overshoot
ISOLATION CHARACTERISTICS
Isolation Voltage (dielectric strength)
Isolation Resistance
Isolation Capacitance (input to output)
TEMPERATURE LIMITS FOR POWER DERATING CURVES
Semiconductor Junction Temperature
Board Temperature
Transformer Temperature
Maximum Baseplate Temperature, Tb
EFFICIENCY
100% Load
50% Load
FEATURE CHARACTERISTICS
Switching Frequency
170
ON/OFF Control (Option P)
Off-State Voltage
-1
On-State Voltage
2.4
ON/OFF Controll (Option N)
Off-State Voltage
2.4
On-State Voltage
-1
ON/OFF Controll (Either Option)
Pull-Up Voltage
Pull-Up Resistance
Output Over-Voltage Protection
Over-Temperature Shutdown OTP Trip Point
140
Over-Temperature Shutdown Restart Hysteresis
Load Current Scale Factor
RELIABILITY CHARACTERISTICS
Calculated MTBF (Telcordia) TR-NWT-000332
Calculated MTBF (MIL-217) MIL-HDBK-217F
Field Demonstrated MTBF
12
ms
ms
%
V
MΩ
pF
125
125
125
N/A
96.5
97
200
230
0.8
18
18
0.8
5.0
100
N/A
150
10
3333
4.8
3.3
°C
°C
°C
°C
%
%
kHz
V
V
V
V
Application notes Figures A & B
V
kΩ
V
°C
°C
Average PCB Temperature
See Application Notes; Output Load Current Calc.
10
6 Hrs. 80% load, 200LFM, 40 °C Ta
10
6 Hrs. 80% load, 200LFM, 40 °C Ta
10
6 Hrs. See our website for details
Note 1: UL’s product certification tests were carried out using 20A fast blow fuse. Fuse interruption characteristics have to be taken into account
while designing input traces. User should ensure that Input trace is capable of withstanding fault currents
Note 2: For applications requiring reduced output voltage ripple and noise, consult SynQor applications support (e-mail: support@synqor.com)
Note 3: Isolation capacitance can be added external to the module.
Product # BQ55090QPA40
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2BQ559K Rev. C
12/09/10
Page 4
Technical Specification
STANDARDS COMPLIANCE
Parameter
Notes & Conditions
Input:35-55V
Output:9.6V
Current:43A
Part No.:BQ55090QPx40
STANDARDS COMPLIANCE
UL 60950-1:2007
Basic insulation
EN60950-1/A11:2009/A1:2010
CAN/CSA-C22.2 No. 60950-1:2007
IEC 61000-4-2
ESD test, 8 kV - NP, 15 kV air - NP (Normal Performance)
Note: 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
QUALIFICATION TESTING
Life Test
Vibration
Mechanical Shock
Temperature Cycling
Power/Thermal Cycling
Design Marginality
Humidity
Solderability
Parameter
# Units
32
5
5
10
5
5
5
15 pins
Test Conditions
95% rated Vin and load, units at derating point, 1000 hours
10-55 Hz sweep, 0.060" total excursion, 1 min./sweep, 120 sweeps for 3 axis
100g minimum, 2 drops in x, y and z axis
-40 °C to 100 °C, unit temp. ramp 15 °C/min., 500 cycles
Toperating = min to max, Vin = min to max, full load, 100 cycles
Tmin-10 °C to Tmax+10 °C, 5 °C steps, Vin = min to max, 0-105% load
85 °C, 85% RH, 1000 hours, continuous Vin applied except 5 min/day
MIL-STD-883, method 2003
Product # BQ55090QPA40
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2BQ559K Rev. C
12/09/10
Page 5
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