Product # BQ55090EZB48

Phone 1-888-567-9596

www.synqor.com

Doc.# 005-0006251 Rev. C

02/17/16

Page 1

Technical

Specification

BQ55090EZB48

Contents

®

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: 35-55V

• Fixed frequency switching provides predictable EMI

• No minimum load requirement

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

BQ55090EZB48 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)

The BusQor® BQ55090EZx48 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.

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

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.

35-55V

9.6V

48A

2000V dc

Eighth-brick

Continuous Input

Output

Current

Isolation

DC-DC Converter

Page No.

Electrical Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Standards Compliance & Qualification Testing . . . . . . . . . . . . . . . . . . . 5

Technical Figures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Applications Section. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13