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User's Guide
SLUU924–April 2012
QFN-Packaged bq24270/271
Evaluation Modules
The bq24270/271 evaluation module is a complete charger module for evaluating compact, flexible, and
high-efficiency charge-management solutions for single-cell, Li-ion, and Li-polymer batteries used in a
wide range of portable applications. These charge-management solutions are also switch-mode and USB-
friendly.
Contents
1 Introduction .................................................................................................................. 2
1.1 bq2427x IC Features .............................................................................................. 2
1.2 bq24270/271EVM 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 ................................................................................ 10
3 Printed-Circuit Board Layout Guideline ................................................................................. 11
4 Bill of Materials and Board Layout ...................................................................................... 13
4.1 Bill of Materials .................................................................................................... 13
4.2 Board Layout ...................................................................................................... 15
List of Figures
1 HPA758A Schematic ....................................................................................................... 3
2 BAT_Load (PR1010) Schematic.......................................................................................... 7
3 Connections of HPA172 Kit................................................................................................ 8
4 Original Test Setup for bq24270/271EVM (HPA758) .................................................................. 9
5 Main Window of bq2427x EVM Evaluation Software................................................................. 10
6 Top Assembly Layer ...................................................................................................... 15
7 Top Layer .................................................................................................................. 16
8 First Internal Layer ........................................................................................................ 17
9 Second Internal Layer .................................................................................................... 18
10 Bottom Layer............................................................................................................... 19
List of Tables
1 Bill of Materials - HPA758................................................................................................ 13
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C is a trademark of Philips Electronics N.V.
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SLUU924–April 2012 QFN-Packaged bq24270/271 Evaluation Modules
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