Technical
Specification
BQ55120EZB38
Eighth-brick
DC-DC Converter
35-55V
Continuous Input
12.0V
Output
38A
Current
2000V dc
Isolation
The BusQor® BQ55120EZx38 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 “eighth-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% at full rated load current
• Delivers 38A full power with minimal derating - no heatsink required
BQ55120EZB38 Model
• Operating input voltage range: 35-55V
• Fixed frequency switching provides predictable EMI
• No minimum load requirement
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)
Protection Features
• Inherent current share (by droop method) for high current and
parallel applications.
• 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
Page No.
Safety Features
• UL 60950-1:2007/R:2011-12
• EN 60950-1:2006/A2:2013
• CAN/CSA C22.2 No. 60950-1:2007/A1:2011
Electrical Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Standards Compliance & Qualification Testing . . . . . . . . . . . . . . . . . . . 5
Technical Figures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Applications Section. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Ordering Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Product # BQ55120EZB38
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0006259 Rev. C
02/17/16
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