Datasheet

User's Guide
SLUU917–April 2012
QFN-Packaged bq24278 Evaluation Module
The bq24278 evaluation module is a complete charger module for evaluating a compact, flexible, high-
efficiency, switch-mode charge management solution for single-cell, Li-ion and Li-polymer batteries used
in a wide range of portable applications.
Contents
1 Introduction .................................................................................................................. 2
1.1 bq2427x IC Features .............................................................................................. 2
1.2 bq24278 EVM Features ........................................................................................... 2
1.3 Schematic ........................................................................................................... 3
1.4 I/O Description ...................................................................................................... 4
1.5 Test Points .......................................................................................................... 4
1.6 Control and Key Parameters Setting ............................................................................ 5
1.7 Recommended Operating Conditions ........................................................................... 5
2 Test Summary ............................................................................................................... 6
2.1 Definitions ........................................................................................................... 6
2.2 Recommended Test Equipment ................................................................................. 6
2.3 Recommended Test Equipment Setup .......................................................................... 7
2.4 Recommended Test Procedure .................................................................................. 8
3 Printed-Circuit Board Layout Guideline ................................................................................. 10
4 Bill of Materials and Board Layout ...................................................................................... 11
4.1 Bill of Materials .................................................................................................... 11
4.2 Board Layout ...................................................................................................... 12
List of Figures
1 bq24278EVM (HPA759) Schematic ...................................................................................... 3
2 BAT Load (PR1010) Schematic........................................................................................... 7
3 Original Test Setup for bq24278 EVM (HPA759)....................................................................... 8
4 Top Assembly Layer ...................................................................................................... 12
5 Top Layer .................................................................................................................. 13
6 Bottom Layer............................................................................................................... 13
7 First Internal Layer ........................................................................................................ 14
8 Second Internal Layer .................................................................................................... 14
List of Tables
1 Bill of Materials - HPA759A ............................................................................................. 11
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SLUU917–April 2012 QFN-Packaged bq24278 Evaluation Module
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