BQ57090EZB48
40-57V
Continuous Input
Technical
Specification
Eighth-brick
DC-DC Converter
9.6V
Output
48A
Current
2000V dc
Isolation
The BusQor BQ57090EZx48 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 BusQor series provides an isolated step
down voltage from 48V to 12 or 9.6V intermediate bus
with no regulation in a standard “eight-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.
Operational Features
•
•
•
•
•
High efficiency, 97.1% at full rated load current
Delivers 48A full power with minimal derating - no heatsink required
Operating input voltage range: 40-57V
Fixed frequency switching provides predictable EMI
No minimum load requirement
BQ57090EZB48 Model
Mechanical Features
• Industry standard quarter-brick pin-out configuration
• Size: 0.96 x 2.3” (24.4x58.4mm), height: 0.539" (13.69mm)
• Total Baseplate weight: 1.69 oz (47.9 g)
Control Features
• On/Off control referenced to input side
(positive and negative logic options are available)
• Inherent current share (by droop method) for high current and
parallel applications.
Protection Features
• Input under-voltage lockout and over-voltage shutdown protects
against abnormal input voltages
• Output current limit and short circuit protection (auto recovery)
• Output over-voltage protection
• Thermal shutdown
Contents
Safety Features
Pending
• UL 60950-1:R2011-12
• EN60950-1/A12:2011
• CAN/CSA-C22.2 No. 60950-1/A1:2011
Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Standards Compliance & Qualification Testing . . . . . . . . . . . . . . . . . . . 5
Technical Figures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Applications Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Page No.
Product # BQ57090EZB48
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0006443 Rev. A
05/15/14
Page 1
Baseplated Mechanical Diagram
0.96 [24.4]
0.539 ± 0.030
[ 13.69 ± 0.75]
Overall Height
0.040 ± 0.010
[ 1.02 ± 0.25 ]
Bottomside
Clearance
Input:
Output:
Current:
Package:
4
40-57V
9.6V
48A
Eighth-brick
5
0.600 [15.24 ]
2.30
[58.4 ]
2.000
[50.80 ]
2.000
[50.80 ]
0.15
[3.8 ]
0.14
[3.6 ]
0.15 [3.8]
0.660 [16.76 ]
3
0.180 [4.57]
2
1
0.18 [4.6]
0.300 [7.62]
0.600 [15.24]
NOTES
1)PINS 1-3 ARE 0.040" (1.02mm) DIA. WITH 0.080" (2.03mm)
DIA. STANDOFF SHOULDERS
2)PINS 4 & 5 ARE 0.062" (1.57mm) DIA. WITH 0.100" (2.54mm)
DIA. STANDOFF SHOULDERS
3)ALL PINS: MATERIAL: COPPER ALLOY
FINISH: MATTE TIN OVER NICKEL PLATE
4)UNDIMENSIONED COMPONENTS ARE SHOWN FOR
VISUAL REFERENCE ONLY
5)ALL DIMENSIONS IN INCHES (mm)
TOLERANCES: X.XX IN +/-0.02 (X.X mm +/-0.5 mm)
Pin
Name
PIN DESIGNATIONS
Function
1 Vin(+) Positive input voltage
2 ON/OFF Logic control input to turn converter on/off.
3 Vin(–) Negative input
4 Vout(–) Negative output
5 Vout(+) Positive output
Product # BQ57090EZB48
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0006443 Rev. A
05/15/14
Page 2
Technical Specification
BQ57090EZB48 Electrical Characteristics
Input:
Output:
Current:
Package:
40-57V
9.6V
48A
Eighth-brick
Ta = 25 °C, airflow rate = 300 LFM, Vin = 48V dc unless otherwise noted; full operating temperature range is -40 °C to +100 °C base plate temperature
with appropriate power derating. Specifications subject to change without notice.
Parameter
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Non-Operating
Operating
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 (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
EFFICIENCY
100% Load
50% Load
Min.
Typ.
Max.
Units Notes & Conditions
-1
40
60
57
2000
V
V
V
°C
°C
V
V
V
V
V
V
Continuous
Continuous
-40
-45
-2
40
48
37.0
34.5
2.5
57.1
58.1
59.2
100
125
18
57
59.9
10.2
135
12.0
20
20
V
V
A
mA
mA
mA
mA
A
µF
µF
V
%\V
%\mV
%\mV
Vin = 40 V
5.0
10
375
47
9.4
9.5
35.5\3.4
5.2\500
2.1\200
7.300
90
25
0
60
7
10
RMS through 10µH inductor
RMS, full load
Fast blow external fuse recommended
Typical ESR 0.1-0.2 Ω
Internal values; see Note 4
Vin = 48 V; Io = 0 A
11.400
150
48
V
mV
mV
A
A
V
mA
µF
%
%
Over sample, line, load, temperature & life
20 MHz bandwidth; see Note 2
Full load
Full load
Subject to thermal derating
Output Voltage 10% Low; see Note 4
Negative current drawn from output
9.6 Vout at 24 A Resistive Load
5,000
97.1
97.5
Product # BQ57090EZB48
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0006443 Rev. A
05/15/14
Page 3
Technical Specification
Input:
Output:
Current:
Package:
40-57V
9.6V
48A
Eighth-brick
BQ57090EZB48 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 base plate temperature
with appropriate power derating. Specifications subject to change without notice.
Parameter
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 5mF output capacitance)
Start-Up Inhibit Time
Output Voltage Overshoot
ISOLATION CHARACTERISTICS
Isolation Voltage (dielectric strength)
Isolation Resistance
Isolation Capacitance (input to output)
Semiconductor Junction Temperature
Board Temperature
Transformer Core Temperature
Base Plate Temperature
FEATURE CHARACTERISTICS
Switching Frequency
ON/OFF Control (Option P)
Off-State Voltage
On-State Voltage
ON/OFF Control (Option N)
On-State Voltage
Off-State Voltage
ON/OFF Control (Either Option)
Open Voltage
Pull-Up Current
Over-Temperature Shutdown OTP Trip Point
Over-Temperature Shutdown Restart Hysteresis
RELIABILITY CHARACTERISTICS
Calculated MTBF (Telcordia) TR-NWT-000332
Calculated MTBF (MIL-217) MIL-HDBK-217F
Min.
Typ.
Max.
Units Notes & Conditions
400
100
6
200
0
2000
30
N/A
125
125
130
100
171
-1
2.4
-1
2.4
4.4
0.044
140
10
4.8
3.3
150
200
228
0.8
18
0.8
18
10
mV
µs
ms
ms
%
V
MΩ
pF
°C
°C
°C
°C
kHz
V
V
V
V
50% to 75% to 50% Iout max
To within 1% Vout nom
Half load, Vout=90% nom.
-40 °C to +125 °C; Figure F
5 mF load capacitance
See Absolute Maximum Ratings
See Note 3
Package rated to 150 °C
UL rated max operating temp 130 °C
Application notes Figures A & B
V
mA
°C
°C
Average PCB Temperature
10
6
Hrs. 80% load, 200LFM, 40 °C Ta
10
6
Hrs. 80% load, 200LFM, 40 °C Ta
Field Demonstrated MTBF
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.
Note 4: Recommend adding external filter inductor (0.47 µH) between external input capacitance (47 µF) and Bus Qor module.
Product # BQ57090EZB48
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0006443 Rev. A
05/15/14
Page 4
Technical Specification
Standards Compliance & Qualification Testing
Parameter
Notes & Conditions
Input:
Output:
Current:
Package:
40-57V
9.6V
48A
Eighth-brick
STANDARDS COMPLIANCE
Pending
UL 60950-1:R2011-12
Basic insulation
EN60950-1/A12:2011
CAN/CSA-C22.2 No. 60950-1/A1:2011
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.
Parameter
QUALIFICATION TESTING
Life Test
Vibration
Mechanical Shock
Temperature Cycling
Power/Thermal Cycling
Design Marginality
Humidity
Solderability
# 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, 95% RH, 1000 hours, continuous Vin applied except 5 min/day
MIL-STD-883, method 2003
Product # BQ57090EZB48
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0006443 Rev. A
05/15/14
Page 5
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