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Texas Instruments BQ24392EVM Скачать руководство пользователя страница 8

BQ24392 Implementation Guidelines

These test points also feature LED indicators that turn on when the output is active. That is, for CHG_DET
the LED turns on when the output is high. For CHG_AL_N and SW_OPEN, the LED turns on when the
output is low.

is the schematic section for the LED output indicators.

Figure 7. LED Output Schematic

3.5.4

USB Connections

The micro-USB connector (J2) is the common side of the BQ24392 and the standard-A USB connector
(J1) is the host side of the BQ24392.

There is also a through path on the board that can be used for testing. The connectors for the through
path are J4 and J5.

Figure 8. Device and USB Connections

3.6

BQ24392 Quick Start Evaluation

3.6.1

High-Current Chargers

High-current chargers include the following:

•

BC1.2-compliant DCPs

•

BC1.2-compliant CDPs

•

Apple Chargers

•

TomTom Chargers

8

BQ24392EVM User's Guide

SLVUA61 – April 2014

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Copyright © 2014, Texas Instruments Incorporated

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Содержание BQ24392EVM

Страница 1: ...6 3 6 BQ24392 Quick Start Evaluation 8 4 Board Documentation 12 4 1 Bill of Materials 12 4 2 Schematic 13 4 3 Board Layout 14 5 Board Stackup and Layout Guidelines 17 6 Related Documentation 17 List...

Страница 2: ...provided for your protection Please read each caution and warning carefully 2 Introduction The BQ24932EVM is an evaluation module for TI s BC1 2 compatible charger detection IC with an integrated USB...

Страница 3: ...om Introduction Figure 1 EVM Block Diagram 2 1 List of Hardware Items for Operation The following items are required for EVM evaluation BQ24392 EVM BC1 2 compliant charger PC with USB port USB cable U...

Страница 4: ...tion on how to use the GPIOs is available in Section 5 Table 1 Detection Table GOOD_BAT CHG_AL_N CHG_DET SW_OPEN Switch Device Type VBUS DP_CON D DM_CON D Input Output Output Output Status HIGH LOW LO...

Страница 5: ...eceptacle the detection algorithm of the BQ24392 will timeout and instead of the charger being detected as a DCP it is now detected as a nonstandard charger D and D floating 3 3 DBP Timer The BQ24392...

Страница 6: ...st controller to indicate the status of the battery to the BQ24392 This pin affects the switch status for a SDP or CDP and it also affects the DBP timer as discussed in the DBP timer section 3 5 EVM O...

Страница 7: ...trate the schematic and the EVM board labeling Figure 4 Schematic for GOOD_BAT Selection Header Figure 5 GOOD_BAT Selection Header on EVM 3 5 3 Test Points The EVM also contains test point for the 3 o...

Страница 8: ...ro USB connector J2 is the common side of the BQ24392 and the standard A USB connector J1 is the host side of the BQ24392 There is also a through path on the board that can be used for testing The con...

Страница 9: ...nt chargers include the following SDP Nonstandard chargers with VBUS 5 V and D D floating Table 4 shows the output status for different low current charger attachments notice that the GOOD_BAT input a...

Страница 10: ...dard Charger Figure 11 shows how with an SDP changing the GOOD_BAT input to high closes the switches and turns on the SW_OPEN Output Figure 11 SDP with GOOD_BAT High 10 BQ24392EVM User s Guide SLVUA61...

Страница 11: ...aching an SDP to the common side with GOOD_BAT High we can communicate to a USB thumb drive inserted into the standard A receptacle see Figure 12 for an example Figure 12 USB Communication with Thumb...

Страница 12: ...Micro USB B Right Angle SMD Micro USB receptacle 105017 0001 J3 1 Header TH 100mil 3x1 Gold plated 230 mil 3x1 Header TSW 103 07 G S above insulator R1 R7 2 1 1k RES 1 1k ohm 5 0 1W 0603 0603 CRCW0603...

Страница 13: ...J5 VBUS 1 D 2 D 3 GND 4 5 6 J1 VBUS is Power input to Board 1 TP1_VBUS GND 1 1k R7 GND VBUS 2 80k R8 0 R3 Green D2 Through_N Through_P IN 1 GND 2 EN 3 NC 4 OUT 5 U2 TLV71333PDBV GND VBUS VBUS 3V3 GND...

Страница 14: ...d Layout Figure 14 through Figure 19 illustrate the PCB layout for this EVM Figure 14 Top Overlay Figure 15 Top Layer 14 BQ24392EVM User s Guide SLVUA61 April 2014 Submit Documentation Feedback Copyri...

Страница 15: ...www ti com Board Documentation Figure 16 Ground Layer Figure 17 Power Layer 15 SLVUA61 April 2014 BQ24392EVM User s Guide Submit Documentation Feedback Copyright 2014 Texas Instruments Incorporated...

Страница 16: ...Board Documentation www ti com Figure 18 Bottom Layer Figure 19 Bottom Overlay 16 BQ24392EVM User s Guide SLVUA61 April 2014 Submit Documentation Feedback Copyright 2014 Texas Instruments Incorporated...

Страница 17: ...and plane layers are 1 4 mil thick Core FR 4 Prepreg FR 4 Figure 20 Board Stackup 6 Related Documentation BQ24392 Charger Detection Device with High Speed USB Switch Battery Charger Specification v1...

Страница 18: ...dling and use of EVMs and if applicable compliance in all respects with such laws and regulations 10 User has sole responsibility to ensure the safety of any activities to be conducted by it and its e...

Страница 19: ...his equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications Opera...

Страница 20: ...age et ayant un gain admissible maximal et l imp dance requise pour chaque type d antenne Les types d antenne non inclus dans cette liste ou dont le gain est sup rieur au gain maximal indiqu sont stri...

Страница 21: ...sponsible for compliance with all legal regulatory and safety related requirements concerning its products and any use of TI components in its applications notwithstanding any applications related inf...

Страница 22: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Texas Instruments BQ24392EVM...

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