Texas Instruments BQ24392EVM, User Manual, Page: 1 / 22

User's Guide
SLVUA61 – April 2014
BQ24392EVM User's Guide
This document is the EVM user guide for the BQ24392. The BQ24392 is a charger detection IC with an
integrated USB 2.0 high-speed isolation switch for use with a micro- or mini-USB port. The device is
compatible with all BC1.2 chargers and detects both Apple
®
and TomTom™ chargers.
NOTE: This board is not designed to support high-current charging.
Contents
1 About this Manual
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2
1.1 Information about Cautions and Warnings
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2
2 Introduction
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2
2.1 List of Hardware Items for Operation
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3
3 BQ24392 Implementation Guidelines
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4
3.1 Detection Overview
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4
3.2 Slow Plug-in Event
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5
3.3 DBP Timer
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5
3.4 Using the BQ24932 GPIOS
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5
3.5 EVM Overview
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6
3.6 BQ24392 Quick Start Evaluation
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8
4 Board Documentation
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12
4.1 Bill of Materials
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12
4.2 Schematic
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13
4.3 Board Layout
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14
5 Board Stackup and Layout Guidelines
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17
6 Related Documentation
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17
List of Figures
1 EVM Block Diagram
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3
2 Data Connections Recessed from Power Connections
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5
3 Schematic for 3.3-V Output LDO
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6
4 Schematic for GOOD_BAT Selection Header
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7
5 GOOD_BAT Selection Header on EVM
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7
6 Test Point Locations
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7
7 LED Output Schematic
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8
8 Device and USB Connections
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8
9 EVM After High-Current Charger Attached
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9
10 SDP with GOOD_BAT Low or Nonstandard Charger
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10
11 SDP with GOOD_BAT = High
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10
12 USB Communication with Thumb Drive Through BQ24392
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11
13 BQ24392EVM Schematic
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13
14 Top Overlay
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14
15 Top Layer
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14
16 Ground Layer
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15
17 Power Layer
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15
1 SLVUA61 – April 2014 BQ24392EVM User's Guide
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