1
Introduction
1.1
EVM Features
User's Guide
SLUU284A – June 2007 – Revised October 2008
bq24740/1EVM (HPA206) For Multicell Synchronous
Notebook Charger
Contents
1
2
Test Summary
3
PCB Layout Guideline
4
Bill of Materials, Board Layout, and Schematics
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List of Figures
1
Original Test Setup for HPA206 (bq24740EVM)
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2
Test Setup for HPA206 (bq24740EVM)
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3
Top and Silk Layer
4
Second Layer
5
Third Layer
6
Bottom Layer
7
Bottom Assembly
8
Top Assembly
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Evaluation module for bq24740/1
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High-efficiency NMOS-NMOS synchronous buck charger with 300-kHz frequency
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Battery/adapter to system power selector function
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User-selectable 2-cell, 3-cell, or 4-cell Li-ion battery voltage
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User-programmable battery regulation voltage with external voltage source (4.2/cell by default)
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User-programmable charge current with external voltage source (3 A by default)
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User-programmable input current limit with external voltage source (4.5 A for bq24740, 4 A for
bq24741 by default)
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Pin-programmable interface for control and status communications with host
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AC adapter operating range 18 V to 22 V
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LED indication for control and status signals
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Test points for key signals available for testing purpose. Easy probe hook-up
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Jumpers available. Easy to change connections
SLUU284A – June 2007 – Revised October 2008
bq24740/1EVM (HPA206) For Multicell Synchronous Notebook Charger
1
