BQ55090QEx60
52.5V
Input
Technical
Specification
9.6V
Output
60A
Current
546W
Power
2000V dc
Isolation
Quarter-brick
DC-DC Converter
The BusQor BQ55090QEx60 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.
Operational Features
• High efficiency, 96% at full rated load current
• Delivers 60A full power with minimal derating - no heatsink required
• Operating input voltage range: 35-55V
• Fixed frequency switching provides predictable EMI
• No minimum load requirement
BQ55090QEx60 Model
Mechanical Features
• Industry standard quarter-brick pin-out configuration
• Size: 1.45” x 2.3” (36.8x58.4mm), height: 0.467” (11.86mm)
• Total open frame weight: 1.5 oz (42 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
• UL 60950-1:R2011-12
• EN60950-1/A12:2011
• CAN/CSA-C22.2 No. 60950-1/A1:2011
Mechanical Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Standards Compliance & Qualification Testing . . . . . . . . . . . . . . . . . . . 6
Technical Figures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Applications Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
www.synqor.com
Doc.# 005-0006052 Rev. C
12/31/13
Page No.
Product # BQ55090QEx60
Phone 1-888-567-9596
Page 1
Open Frame Mechanical Diagram
Input:
Output:
Current:
Package:
35-55V
9.6V
60A
Quarter-brick
1.450
[ 36.83]
.600
[ 15.24 ]
5
4
.467 ±.020
[ 11.86 ±0.5]
OVERALL HEIGHT
.056 ±.010
[ 1.42 ±0.25 ]
BOTTOMSIDE
CLEARANCE
2.300
[ 58.42 ]
2.000
[ 50.8 ]
.143
[ 3.63 ]
1
2
3
.425
[ 10.8 ]
.300
[ 7.62 ]
.600
[ 15.24 ]
.110
[ 2.79 ]
SEE NOTE 3
NOTES
1) Pins 1-3 are 0.040” (1.02mm) diameter with 0.080” (2.03 mm)
diameter standoff shoulders.
2) Pins 4-5 are 0.062” (1.57 mm) diameter with 0.100” (2.54 mm)
diameter standoff shoulders.
3) Other pin lengths available. Recommended pin length is 0.03”
(0.76mm) greater than the PCB thickness.
4) All Pins: Material - Copper Alloy
Finish: Matte Tin over Nickel plate
5) Undimensioned components are shown for visual reference only.
6) All dimensions in inches (mm)
7) Tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm)
x.xxx +/-0.010 in. (x.xx +/-0.25mm)
Weight: 1.5 oz (42 g) typical
8) Workmanship: Meets or exceeds IPC-A-610C Class II
9) 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.
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 # BQ55090QEx60
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0006052 Rev. C
12/31/13
Page 2
Baseplated Mechanical Diagram
1.510[38.35]
1.100[27.94]
.600
[15.24]
Input:
Output:
Current:
Package:
35-55V
9.6V
60A
Quarter-brick
.517±.030
[ 13.13±0.76 ]
OVERALL HEIGHT
.053±.030
[ 1.35±0.76 ]
BOTTOMSIDE
CLEARANCE
5
4
2.340
[59.44]
2.000
[50.8]
1.900
[48.26]
.750
[19.05]
1
.160±.015 [4.06±0.38]
.455±.0151 [1.56±0.38]
.300[7.62]
.600[15.24]
2
3
.060
[1.52]
M3 INSERTS
(3 PLACES)
(SEE NOTES 1&2
.110
[2.79]
SEE NOTE 4
.850[21.59]
NOTES
1) M3 screws used to bolt unit's baseplate to other surfaces such as
heatsinks must not exceed 0.85" depth below the surface
of the baseplate.
2) Applied torque per screw should not exceed 6in-lb (0.7n
3)
Baseplate flatness tolerance is 0.004" (.10mm) TIR for surface
4) Other pin extension lengths available
5) Pins 1-3 are 0.040" (1.02mm) dia. with 0.080" (2.03mm) dia.
standoff shoulders
6) Pins 4 and 5 are 0.062" (1.57mm) dia. with 0.100" (2.54mm) dia.
standoff shoulders
7) All pins: Material: Copper Alloy
Finish: Matte Tin over Nickel plate
8) Undimensioned components are shown for visual reference only
9) Weight: 2.7 oz (78 g) typical
10) All dimensions in inches(mm)
Tolerances: x.xxin +/-0.02 (x.xmm +/-0.5mm)
x.xxxin +/-0.010 (x.xxmm +/-0.25mm)
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 # BQ55090QEx60
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0006052 Rev. C
12/31/13
Page 3
Technical Specification
BQ55090QEx60 Electrical Characteristics
Input:
Output:
Current:
Package:
35-55V
9.6V
60A
Quarter-brick
Ta = 25 °C, airflow rate = 300 LFM, Vin = 52.5V 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
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\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
EFFICIENCY
100% Load
50% Load
Min.
Typ.
Max.
Units Notes & Conditions
-0.5
35
60
55
2000
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
Continuous
Continuous
-40
-55
-2
35
48
33.4
31
2.4
56.9
59.2
100
125
18
55
16.5
8.5
10
35
47
0.47\11
9.6
40\3.8
5.2\500
2\200
6.500
90
25
0
78
7
10
5,000
96
96
60
11.000
150
115
12.0
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
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
Negative current drawn from output
10.5 Vout at 30 A Resistive Load
Product # BQ55090QEx60
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0006052 Rev. C
12/31/13
Page 4
Technical Specification
Input:
Output:
Current:
Package:
35-55V
9.6V
60A
Quarter-brick
BQ55090QEx60 Electrical Characteristics (continued)
Ta = 25 °C, airflow rate = 300 LFM, Vin = 52.5V 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
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
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 Controll (Either Option)
Pull-Up Voltage
Pull-Up Resistance
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
Field Demonstrated MTBF
Min.
Typ.
Max.
Units Notes & Conditions
400
100
15
200
0
2000
30
470
125
125
130
110
-1
2.4
-1
2.4
5
124
140
10
4.8
3.3
150
125
139
0.8
18
0.8
18
22
mV
µs
ms
ms
%
V
MΩ
pF
°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
kΩ
°C
°C
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
Average PCB Temperature
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 # BQ55090QEx60
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0006052 Rev. C
12/31/13
Page 5
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