Product # BQ55090QEx60

Phone 1-888-567-9596

www.synqor.com

Doc.# 005-0006052 Rev. D

05/07/15

Page 1

Technical

Specification

BQ55090QEx60

Contents

®

Operational Features

• High efficiency, 96.6% at full rated load current

• Delivers 60 A full power with minimal derating - no heatsink required

• Operating input voltage range: 35-55 V

• 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

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)

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 48

V to 12 or 9.6 V 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.

Safety Features

• UL 60950-1/R2011-12

• EN60950-1/A2:2013

• CAN/CSA-C22.2 No. 60950-1/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.

52.5 V

9.6 V

60 A

546 W

2000 V dc

Quarter-brick

Input

Output

Current

Power

Isolation

DC-DC Converter

Page No.

Open Frame Mechanical Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Baseplated Mechanical Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Electrical Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Compliance & Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Technical Figures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Applications Section. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14