Texas Instruments bq28400EVM-001, User Manual

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User's Guide
SLUU494 – February 2011
bq28400EVM-001 SBS 1.1 Compliant Tablet PC and
Netbook 2-Series Cell Li-Ion Battery Gas Gauge and
Protection
The bq28400EVM-001 is a complete evaluation system for the bq28400/bq29200 battery management
system. The evaluation module (EVM) includes one bq28400/bq29200 circuit module. Windows™-based
PC software can be downloaded from the bq28400EVM product web page. The circuit module includes
one bq28400 integrated circuit (IC), one bq29200 IC, and all other onboard components necessary to
monitor and predict capacity, perform cell balancing, monitor critical parameters, and protect the cells from
overcharge, over-discharge, short-circuit, and overcurrent in 2-series cell Li-ion or Li-Polymer battery
packs. The circuit module connects directly across the cells in a battery. With the EV2x00 interface board
and software, the user can read the bq28400 data registers, program the chipset for different pack
configurations, log cycling data for further evaluation, and evaluate the overall functionality of the
bq28400/bq29200 solution under different charge and discharge conditions.
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Contents
1 Features
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2
2 bq28400-Based Circuit Module
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2
3 bq28400 Circuit Module Schematic
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3
4 Circuit Module Physical Layouts and Bill of Materials
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4
5 EVM Hardware and Software Setup
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11
6 Troubleshooting Unexpected Dialog Boxes
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11
7 Hardware Connection
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11
8 Operation
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13
9 Calibration Screen
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10 Pro (Advanced) Screen
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11 Pack Assembly and the bq28400
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List of Figures
1 bq28400EVM-001 Layout (Silk Screen)
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4
2 Top Assembly
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4
3 Top Layer
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4 Internal Layer 1
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5 Internal Layer 2
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6 Bottom Layer
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7 Bottom Assembly
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8 Schematic
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9 bq28400 Circuit Module Connection to Cells and System Load/Charger
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12
10 SBS Data Screen
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14
11 Data Flash Screen, 1st Level Safety Class
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15
12 Calibration Screen
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17
13 Pro (Advanced) Screen
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19
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1 SLUU494 – February 2011 bq28400EVM-001 SBS 1.1 Compliant Tablet PC and Netbook 2-Series Cell
Li-Ion Battery Gas Gauge and Protection
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