Datasheet

User's Guide
SLUU378–September 2009
0.8-A, Single-Input, Single-Cell Li-Ion Battery Charger
This user’s guide describes the bq24050/2/5 evaluation module (EVM), how to perform a stand-alone
evaluation or interface with a host or system. The charger is designed to deliver up to 800mA of
continuous current to the battery output when programmed with a resistor on the ISET pin and is
programmed for ~540mA at the factory. The USB current limit modes are selected by the ISET2 pin and
limits current to a maximum of 500mA (logic high) or 100mA (float or high impedance). A low on the
ISET2 pin programs the charge current using the ISET resistor.
Contents
1 Introduction .................................................................................................................. 2
2 Considerations With Evaluating the bq24050/2/5 ...................................................................... 2
3 Performance Specification Summary ..................................................................................... 2
4 Test Summary ............................................................................................................... 2
4.1 Equipment ........................................................................................................... 3
4.2 Equipment and EVM Setup ....................................................................................... 3
4.3 Test Procedure Using a Single Cell Li-Ion Battery ............................................................ 3
4.4 Alternate Test Methods ........................................................................................... 4
5 Schematics, Physical Layouts, and Bill of Materials ................................................................... 5
5.1 Schematics – HPA388A ........................................................................................... 5
5.2 Physical Layouts – HPA388A .................................................................................... 6
5.3 Bill of Materials – HPA388A ...................................................................................... 7
5.4 Schematics – HPA379A ........................................................................................... 9
5.5 Physical Layouts – HPA379A ................................................................................... 10
5.6 Bill of Materials – HPA379A ..................................................................................... 11
List of Figures
1 bq24050/2/5 Setup Schematic ............................................................................................ 3
2 bq24050/2 EVM Schematic................................................................................................ 6
3 Top Assembly ............................................................................................................... 6
4 Top View ..................................................................................................................... 7
5 Bottom View ................................................................................................................. 7
6 bq24055 EVM Schematic.................................................................................................. 9
7 Top Assembly.............................................................................................................. 10
8 Top View.................................................................................................................... 11
9 Bottom View................................................................................................................ 11
List of Tables
1 HPA388A BOM – bq24050/2.............................................................................................. 7
2 HPA379A BOM – bq24055............................................................................................... 11
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SLUU378–September 2009 0.8-A, Single-Input, Single-Cell Li-Ion Battery Charger
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