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User's Guide

SLUU495A–October 2011–Revised September 2012

bq24140, Fully Integrated, Dual-Input, Switch-Mode, One-

Cell, Li-Ion Charger With Full USB Compliance and USB-

OTG Support EVM

The bq24140 evaluation module is a complete charger module for evaluating compact, flexible, high-

efficiency, USB-friendly, switch-mode charge management and USB-OTG solution for single-cell Li-ion

and Li-polymer batteries used in a wide range of portable applications.

Contents

1 Introduction .................................................................................................................. 2

1.1 EVM Features ...................................................................................................... 2

1.2 General Description ................................................................................................ 2

1.3 I/O Description ...................................................................................................... 2

1.4 Test Point Descriptions ............................................................................................ 2

1.5 Control and Key Parameters Setting ............................................................................ 3

1.6 Recommended Operating Conditions ........................................................................... 3

2 Test Summary ............................................................................................................... 4

2.1 Definitions ........................................................................................................... 4

2.2 Recommended Test Equipment ................................................................................. 4

2.3 Recommended Test Equipment Setup .......................................................................... 5

2.4 Recommended Test Procedure .................................................................................. 7

3 Printed-Circuit Board Layout Guideline .................................................................................. 9

4 Bill of Materials, Board Layout, and Schematics ...................................................................... 11

4.1 Bill of Materials .................................................................................................... 11

4.2 Board Layout ...................................................................................................... 11

4.3 Schematic ......................................................................................................... 15

List of Figures

1 Connections of HPA172 Kit................................................................................................ 5

2 Test Setup for Charging From VIN ....................................................................................... 6

3 Main Window of bq2414x Evaluation Software ......................................................................... 7

4 Test Setup for USB OTG Boost Mode .................................................................................. 9

5 Assembly Top Layer ...................................................................................................... 11

6 Top Silk Layer.............................................................................................................. 12

7 Top Layer................................................................................................................... 12

8 Internal 1.................................................................................................................... 13

9 Layer 3 ...................................................................................................................... 13

10 Bottom Layer............................................................................................................... 14

C is a trademark of Philips Electronics N.V.

SLUU495A–October 2011–Revised September 2012 bq24140, Fully Integrated, Dual-Input, Switch-Mode, One-Cell, Li-Ion Charger

With Full USB Compliance and USB-OTG Support EVM

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Summary of content (20 pages)

PAGE 1
User's Guide SLUU495A – October 2011 – Revised September 2012 bq24140, Fully Integrated, Dual-Input, Switch-Mode, OneCell, Li-Ion Charger With Full USB Compliance and USBOTG Support EVM The bq24140 evaluation module is a complete charger module for evaluating compact, flexible, highefficiency, USB-friendly, switch-mode charge management and USB-OTG solution for single-cell Li-ion and Li-polymer batteries used in a wide range of portable applications. 1 2 3 4 Contents Introduction .....................
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Introduction 1 Introduction 1.1 EVM Features • • • • • • • • 1.2 www.ti.com High-efficiency, fully integrated, NMOS-NMOS, synchronous buck charger with 3-MHz frequency Integrated power FETs for up to 1.
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Introduction www.ti.com 1.5 1.
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Test Summary 2 www.ti.com Test Summary This procedure details how to configure the HPA697 evaluation board for bench evaluation. An electronic load is used to simulate a battery. 2.1 Definitions This procedure details how to configure the PWR003 evaluation board. The following naming conventions apply. See the PWR003 schematic for details.
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Test Summary www.ti.com 2.2.6 HPA172 Communication Kit (USB TO GPIO) A HPA172 USB-to-I2C communication kit. 2.2.7 Software Download BQ2414xSW.zip from the charger's product folder, unzip the file, and double-click on the SETUP.EXE file. Follow the installation steps. 2.3 Recommended Test Equipment Setup 1. 2. 3. 4. Set Power Supply #1 for 5 V ± 100 mVdc, 2-A ± 0.1-A current limit, and then turn off supply.
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Test Summary www.ti.com Figure 2. Test Setup for Charging From VIN 10. Turn on the computer, and open the bq2414x evaluation software. The main window of the software is shown in Figure 3.
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Test Summary www.ti.com Figure 3. Main Window of bq2414x Evaluation Software 2.4 Recommended Test Procedure The following test procedure may be useful for evaluating the charger IC outside of a real system, especially when no battery is available to connect to the output (i.e., Load #2). 2.4.
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Test Summary www.ti.com 1. Ensure that Section 2.3 steps are followed. 2. Turn on PS#1. Turn on Load#2 but set its constant voltage to below 2.05V and move the SLRST jumper shunt to LO. 3. With the software running, disable the Immediate Updates, Periodic Resets, and Periodic Reads features. 4. Increase Load#2 constant voltage to 2.5V and move the SLRST jumper shunt to HI. 5.
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Printed-Circuit Board Layout Guideline www.ti.com Figure 4. Test Setup for USB OTG Boost Mode 4. Turn on PS #1 output. 5. Software setup: Change Operation Mode to Boost mode. Measure on VM #2→ V(J6/TP2, J9/TP13(VBUS, GND)) = 5 V ± 0.2 V 6. Enable Load #1. Measure on VM #2 → V(J6/TP2, J9/TP13(VBUS, GND)) = 5 V ± 0.2 V Measure on CM #1→ Iin = 330 mA ± 40 mA Measure on CM #2→ Io = 200 mA ± 20 mA 7. Turn off PS #1, turn off Load #1, and disconnect. 3 Printed-Circuit Board Layout Guideline 1.
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Printed-Circuit Board Layout Guideline www.ti.com block currents isolated (high-power/low-power small-signal) which reduces noise-coupling and groundbounce issues. A single ground plane for this design gives good results. No ground-bounce issue occurs with this small layout and a single ground plane. Having the components segregated minimizes coupling between signals. 6.
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Bill of Materials, Board Layout, and Schematics www.ti.com 4 Bill of Materials, Board Layout, and Schematics 4.1 Bill of Materials Count 4.2 RefDes Value Description Size Part Number MFR 1 C2 1.0uF Capacitor, Ceramic, 25V, X5R, 10% 0603 STD STD 1 C8 1.0uF Capacitor, Ceramic, 6.3V, X5R, 10% 0402 STD STD 4 C1, C4, C9, C10 0.1uF Capacitor, Ceramic, 25V, X5R, 10% 0402 STD STD 3 C3, C5, C6 4.
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Bill of Materials, Board Layout, and Schematics www.ti.com Figure 6. Top Silk Layer Figure 7.
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Bill of Materials, Board Layout, and Schematics www.ti.com Figure 8. Internal 1 Figure 9.
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Bill of Materials, Board Layout, and Schematics www.ti.com Figure 10.
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www.ti.com 4.
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EVALUATION BOARD/KIT/MODULE (EVM) ADDITIONAL TERMS Texas Instruments (TI) provides the enclosed Evaluation Board/Kit/Module (EVM) under the following conditions: The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user indemnifies TI from all claims arising from the handling or use of the goods.
PAGE 17
FCC Interference Statement for Class B EVM devices This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
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【Important Notice for Users of this Product in Japan】】 This development kit is NOT certified as Confirming to Technical Regulations of Radio Law of Japan If you use this product in Japan, you are required by Radio Law of Japan to follow the instructions below with respect to this product: 1. 2. 3. Use this product in a shielded room or any other test facility as defined in the notification #173 issued by Ministry of Internal Affairs and Communications on March 28, 2006, based on Sub-section 1.
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EVALUATION BOARD/KIT/MODULE (EVM) WARNINGS, RESTRICTIONS AND DISCLAIMERS For Feasibility Evaluation Only, in Laboratory/Development Environments. Unless otherwise indicated, this EVM is not a finished electrical equipment and not intended for consumer use.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.