User's Guide
SLUU439A–August 2010– Revised May 2011
bq24725EVM Evaluation Module
This user's guide describes the features and operation of the bq24725EVM Evaluation Module (EVM).
This EVM assists users in evaluation the bq24725 synchronous battery charger. The manual includes the
bq24725EVM bill of materials, board layout, and schematic.
Contents
1 Introduction .................................................................................................................. 1
2 Test Summary ............................................................................................................... 3
3 PCB Layout Guideline ...................................................................................................... 7
4 Bill of Materials, Board Layouts and Schematics ....................................................................... 8
List of Figures
1 Connections of the EV2300 Kit ........................................................................................... 4
2 Original Test Setup for HPA-542 (bq24725 EVM)...................................................................... 5
3 Main Window of the bq24725 Evaluation Software .................................................................... 5
4 Test Setup for HPA-542.................................................................................................... 7
5 Top Layer................................................................................................................... 10
6 Second Layer .............................................................................................................. 10
7 Third Layer ................................................................................................................. 11
8 Bottom Layer............................................................................................................... 11
9 Top Mask ................................................................................................................... 12
10 Bottom Mask ............................................................................................................... 12
11 Top Silkscreen ............................................................................................................. 13
12 Bottom Silkscreen ......................................................................................................... 13
13 Top Assembly.............................................................................................................. 14
14 Bottom Assembly.......................................................................................................... 14
List of Tables
1 bq24275EVM and EV2300 Connections................................................................................. 4
2 Bill of Materials.............................................................................................................. 8
1 Introduction
1.1 EVM Features
• Evaluation module for bq24725
• High-efficiency NMOS-NMOS synchronous buck charger with 750-kHz frequency
• High-efficiency and low-cost NMOS power path selector and integrated gate driver
• User-selectable 2-cell, 3-cell, or 4-cell Li-ion battery voltage
• Programmable battery voltage, charge current, and ac adapter current via SMBus interface
• Flexible Chargeoption() register control via SMBus interface
• AC adapter operating range 9 V – 24 V
• Test points for key signals available for testing. Easy probe hook-up
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SLUU439A–August 2010–Revised May 2011 bq24725EVM Evaluation Module
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