Texas Instruments BQ24351EVM User's Manual
Contents
1. T u lvo y Z T 7 2 pueg Anavo 1703 7940 P za 42 4 A Sor TIN NIDHO uesuo NIOV peu 2 ia oly AGL ASL Az jet Sia 18 vis 29 1v8 NOUWONddy 2854049 LINDYID 332 E SgAoDzclzB 190510 57 1 bal d n al aka Maayo agoz 99 zs s _ 98 9 1 T T 1vB s ani 15 Sdi Ive 61a vy 5 OND l a z no A gar 4 L zu uno 5 NSOZ60208 io NBO ANV e 29A eu zal 10 138 197 SN3SI 30 8192519 SH 1vH B SN3SI ino AL AB 1ndyno 90 2 In ABE AL Figure 6 bq24351 Schematic 11 bq24351EVM for Li lon Charger Front End Protection IC SLUUA455 October 2010 Submit Documentation Feedback Copyright O 2010 Texas Instruments Incorporated Evaluation Board Kit Important Notice Texas Instruments TI provides the enclosed product s under the following conditions This2. 6 4 2 Board Layout 2 7 4 3 5 E EE EE 11 List of Figures 1 Original Test Setup for HPA666 0924351 DSG 4 2 LayOF 7 3 Layer me 8 4 TOP SNK recien DS 9 5 ASSO MDI ERE 10 6 24351 ora wi ida a madii solom 11 List of Tables 1 Mate tal TEE 6 SLUUA455 October 2010 bq24351EVM for Li lon Charger Front End Protection IC 1 Submit Documentation Feedback Copyright O 2010 Texas Instruments Incorporated TEXAS INSTRUMENTS Introduction www ti com 1 Introduction 1 1 General Description The bq24351 evaluation module EVM is a complete charger module for evaluating a charger front end protection and charger solution using the bq24351 and bq2057C devices It is designed to deliver up to 560 mA of charge current to Li ion or Li polymer applications The charger front end protection current is designed to 1 2 A The bq24351 protects the charging system against three types of failures input overvoltage when the ac adapter fails to regulate its voltage load overcurrent when failures su
3. Increase the output voltage of PS 1 to 5 V 0 1 V Enable the output of load 2 Measure V J2 OUT 3 6 V 200 mV Measure 560 mA 70 mA Observe D2 on D3 on D6 off D7 on CFET Input Overvoltage Protection Increase the voltage of PS 1 to 11 V 0 1 V Observe D2 on D3 off D6 off D7 off Decrease the voltage of PS 1 to 5 V 0 1 V Observe D2 on D3 on D6 off D7 on CFET Load Overcurrent Protection Enable the output of load 1 Observe D2 on D3 off D6 off D7 off Disable the output of load 1 Observe D2 on D3 on D6 off D7 on Decrease the voltage of PS 1 to 0 V 0 1 V PCB Layout Guideline It is critical that the exposed thermal pad on the back side of the bq24351 package be soldered to the printed circuit board PCB ground Ensure that sufficient thermal vias are located underneath the IC 1 connecting to the ground plane on the other layers PCB Layout Guideline The high current charge paths into ACIN and from the CHGIN and OUT pins must be sized appropriately for the maximum charge current in order to avoid excessive voltage drops in these traces Decoupling capacitors for ACIN and CHGIN must be placed to make the interconnections to the IC as short as possible Resistors for VBAT pin must be placed close to the corresponding IC pins and make the interconnections to the IC as short as possible SLUU455 October 2010 Submit Documentation Feedba
4. BATEN GND on JP3 bq24351 GATDRV Jumper off JP4 bq2057C BAT pin connection to bq24351 Jumper on JP5 bq2057C VCC pin connection to bq24351 Jumper on JP6 bq2057C CC pin connection to bq24351 Jumper on JP7 If on low side current sensing resistor is disabled Jumper off Short JP1 JP4 JP5 and JP6 and disconnect JP7 to use onboard bq2057C as charger to use external charger to control bq24351 disconnect JP1 JP4 JP5 and JP6 and short JP7 1 5 Hecommended Operating Conditions Symbol Description MIN TYP MAX Unit Supply voltage Vi Input voltage from ac adapter input 4 5 5 26 V Battery voltage Var Voltage applied at VBAT terminal of J4 0 3 4 2 5 V Supply current lac Maximum input current from ac adapter input 0 1 5 A Charge current long Battery charge current 0 05 0 56 1 A Operating junction temperature range T 0 125 C 2 Test Summary 2 1 Definitions This procedure details how to configure the evaluation board On the test procedure the following naming conventions are followed See the schematic for details VXXX External voltage supply name VIN VBAT VOUT LOADW External load name LOADR LOADI V TPyyy Voltage at internal test point TPyyy For example V TP1 means the voltage at TP1 V Jxx Voltage at jack terminal Jxx V TP XXXXX Voltage at test point XXXXX For example V ACDET means the voltage at the test point which is marked as ACDET V XXX Y
5. evaluation board kit is intended for use for ENGINEERING DEVELOPMENT DEMONSTRATION OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end product fit for general consumer use Persons handling the product s must have electronics training and observe good engineering practice standards As such the goods being provided are not intended to be complete in terms of required design marketing and or manufacturing related protective considerations including product safety and environmental measures typically found in end products that incorporate such semiconductor components or circuit boards This evaluation board kit does not fall within the scope of the European Union directives regarding electromagnetic compatibility restricted substances RoHS recycling WEEE FCC CE or UL and therefore may not meet the technical requirements of these directives or other related directives Should this evaluation board kit not meet the specifications indicated in the User s Guide the board kit may be returned within 30 days from the date of delivery for a full refund THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES EXPRESSED IMPLIED OR STATUTORY INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE The user assumes all responsibility and liability for proper and safe handling of the goods Further the user indemnifies TI from all claims arising
6. frequency energy and has not been tested for compliance with the limits of computing devices pursuant to part 15 of FCC rules which are designed to provide reasonable protection against radio frequency interference Operation of this equipment in other environments may cause interference with radio communications in which case the user at his own expense will be required to take whatever measures may be required to correct this interference EVM Warnings and Restrictions It is important to operate this EVM within the input voltage range of 4 5 V to 26 V and the output voltage range of 0 V to 4 2 V Exceeding the specified input range may cause unexpected operation and or irreversible damage to the EVM If there are questions concerning the input range please contact a TI field representative prior to connecting the input power Applying loads outside of the specified output range may result in unintended operation and or possible permanent damage to the EVM Please consult the EVM User s Guide prior to connecting any load to the EVM output If there is uncertainty as to the load specification please contact a TI field representative During normal operation some circuit components may have case temperatures greater than 70 The EVM is designed to operate properly with certain components above 125 as long as the input and output ranges are maintained These components include but are not limited to linear regulators switching transistors
7. from the handling or use of the goods Due to the open construction of the product it is the user s responsibility to take any and all appropriate precautions with regard to electrostatic discharge EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES TI currently deals with a variety of customers for products and therefore our arrangement with the user is not exclusive TI assumes no liability for applications assistance customer product design software performance or infringement of patents or services described herein Please read the User s Guide and specifically the Warnings and Restrictions notice in the User s Guide prior to handling the product This notice contains important safety information about temperatures and voltages For additional information on TI s environmental and or safety programs please contact the TI application engineer or visit www ti com esh No license is granted under any patent right or other intellectual property right of TI covering or relating to any machine process or combination in which such TI products or services might be or are used FCC Warning This evaluation board kit is intended for use for ENGINEERING DEVELOPMENT DEMONSTRATION OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end product fit for general consumer use It generates uses and can radiate radio
8. F User s Guide TEXAS SLUUA55 October 2010 INSTRUMENTS bq24351EVM for Li lon Charger Front End Protection IC This user s guide describes the features setup and operation of the bq24351EVM evaluation module Included are the bill of materials board layout and schematic Contents 1 2 1 1 General Desctiplion ssusce see 2 1 2 ES 2 1 3 2 1 4 Controls and Key Parameters Setting 3 1 5 Recommended Operating Conditions TREO E UNA URNA a 3 2 Test Summa 3 2 1 emer CR 3 2 2 Equipment x 2 3 evenisset 4 24 5 3 Layout Guideline E 4 Bill of Materials Board Layout and Schematic nenne 6 4 1 Bill of Materials en ex
9. YY Voltage across points XXX and YYY Current going out from the YYY terminal of jack Jxx BBB Terminal or pin BBB of jack xx ON Internal jumper Jxx terminals are shorted Jxx OFF Internal jumper Jxx terminals are open YY ON Internal jumper Jxx adjacent terminals marked as YY are shorted Measure A B Check specified parameters A B If measured values are not within specified limits the unit under test has failed Observe A B Observe if A B occur If they do not occur the unit under test has failed Assembly drawings show locations for jumpers test points and individual components 2 2 Equipment 2 2 1 Power Supplies Power supply 1 PS 1 a power supply capable of supplying 15 V at 2 A is required SLUU455 October 2010 bq24351EVM for Li lon Charger Front End Protection IC 3 Submit Documentation Feedback Copyright O 2010 Texas Instruments Incorporated TEXAS INSTRUMENTS Test Summary www ti com 2 2 2 Load 1 A 10 V or above 2 A or above electronic load that can operate in constant current mode 2 2 3 Load 2 A 10 V or above 2 A or above electronic load that can operate in constant voltage mode 2 2 4 Meters Four Fluke 75 multimeters equivalent or better Or Three equivalent voltage meters and one equivalent current meter The current meter must be capable of measuring 2 A current 2 2 5 Wire Gauge All wires connected to the EVM input power supply and output load must b
10. ch as a short circuit occur in the charging system and battery overcharge For details see the bq24351 data sheet SLUSA62 1 2 EVM Features Evaluation module for bq24351 DSG Evaluation module for bq2057C charger integrated circuit IC Input operating range for bq24351 4 5 V 26 V Input overvoltage protection Input overcurrent protection Battery overvoltage protection LED indication for status signals Test points for key signals available for testing purposes Easy probe hook up Jumpers available Easy to change connections 1 3 I O Description Jack Description J1 DC AC adapter positive output J1 DC AC adapter negative output ground J2 FAULT Reserved for other ICs J2 VBAT bq24351 VBAT pin J2 GATDRV bq24351 GATDRV pin J2 CHGIN bq24351 CHGIN pin J3 BATEN Reserved for ohter ICs J3 OUT bq24351 OUT pin Battery positive output J3 GND Ground J4 BAT Connect to battery positive output 4 Connect to battery negative output ground 2 bq24351EVM for Li lon Charger Front End Protection IC SLUUA455 October 2010 Copyright O 2010 Texas Instruments Incorporated Submit Documentation Feedback 1 TEXAS INSTRUMENTS www ti com Test Summary 1 4 Controls and Key Parameters Setting Jack Description Factory Setting JP1 If on high side sensing resistor is disabled Jumper on JP2 Reserved for other ICs Jumper
11. ck bq24351EVM for Li lon Charger Front End Protection IC 5 Copyright 2010 Texas Instruments Incorporated TEXAS INSTRUMENTS Bill of Materials Board Layout and Schematic www ti com 4 Bill of Materials Board Layout and Schematic 41 Bill of Materials Table 1 Bill of Materials bq24351 RefDes Value Description Size Part Number MFR 1 C1 1 UF Capacitor ceramic 35 V X5R 10 603 Std Std 3 C2 C3 C5 1 UF Capacitor ceramic 10 V X7R 10 603 Std Std 1 C4 0 1 uF Capacitor ceramic 16 V X7R 10 805 Std Std 1 C6 0 1 UF Capacitor ceramic 10 V X7R 1096 603 Std Std 1 C7 220 uF Capacitor electrolytic 25 V 2096 0 327 inch x 0 327 UUD1E221MNL1GS Nichicon inch 8 8 mm x 8 3 mm 1 D1 BZT52C6V8S Diode zener 200 mW 6 8 V SOD 323 BZT52C6V8S General 3 06 Diode LED green 2 1 V 20 mA 6 mcd 603 LTST C190GKT LITE ON 2 D4 D7 Red Diode LED red 2 1 V 20 mA 6 mcd 603 LTST C190CKT Lite On 1 D5 BAT54C Diode dual Schottky 200 mA 30 V SOT23 BAT54C Vishay LITE ON 2 J1 J4 ED1514 2DS Terminal block 2 pin 6 A 3 5 mm 0 27 inch x 0 25 ED1514 2DS OST inch 6 86 mm x 6 35 mm 2 J2 J3 ED1516 4DS Terminal block 4 pin 6 A 3 5 mm 0 55 inch x 0 25 ED1516 4DS OST inch 14 mm x 6 35 mm 5 JP1 JP4 JP5 PECO2SAAN Header 2 pin 100 mil 2 54 mm spacing 0 100 inch 2 54 PECO2SAAN Sull
12. e at least AWG 22 The maximum current is up to 1 A 23 Equipment Setup 4 1 Set PS 1 for 0 V 100 mVdc 2 0 1 current limit and then disable the output Connect the output of PS 1 to J1 DC Connect a voltage meter across J1 DC DC Connect the output of load 1 in series with a current meter multimeter to J2 CHGIN and J3 GND Turn on the power of load 1 Set the load current to 1 5 A 50 mA but disable the output Connect the output of load 2 in series with a current meter multimeter to J4 BAT Connect a voltage meter across J4 BAT Set the voltage of load 2 to 3 6 V 0 1 V and disable output of load 2 JP1 ON JP2 BATEN GND ON JP3 OFF JP4 ON JP5 ON JP6 ON JP7 OFF gt After the preceding steps have been taken the test setup for HPA666 bq24351 DSG EVM appears as is shown in Figure 1 HPA666 bq24351EVM JP7 JP1 J4 ce E i APPLICATION CIRCUIT JPe JP5 JP4 Figure 1 Original Test Setup for HPA666 bq24351 DSG EVM bq24351EVM for Li lon Charger Front End Protection IC SLUUA455 October 2010 Submit Documentation Feedback Copyright O 2010 Texas Instruments Incorporated 1 INSTRUMENTS www ti com 2 4 Procedure 2 4 1 2 4 2 2 4 3 PON gt Charger Current and Voltage Regulation Ensure that steps in Section 2 3 are followed Enable output of PS 1
13. ins JP6 JP7 mm x 2 2 JP2 JP3 PTCO3SAAN Header male 3 pin 100 mil 2 54 mm spacing 0 100 inch 2 54 PTCO3SAAN Sullins 36 pin strip mm x 3 5 929950 00 Shorting jumpers 2 pin 100 mil 2 54 mm 929950 00 3M ESD spacing 2 R1 R2 0 Resistor chip 1 16 W 196 402 Std Std 0 R3 R4 0 Resistor chip 1 16 W 196 402 Std Std 2 R5 R6 200 kQ Resistor chip 1 16 W 596 402 Std Std 2 R7 R8 200 kQ Resistor chip 1 16 W 596 603 Std Std 2 R9 R10 0 20 Resistor metal film 1 4 W 1 1206 Std Std 1 R11 20 kQ Resistor chip 1 16 W 5 603 Std Std 1 R12 100 Resistor chip 1 16 W 5 603 Std Std 1 R13 100 Q Resistor chip 1 16 W 596 603 Std Std 1 R14 6 2 KQ Resistor chip 1 16 W 596 603 Std Std 4 R15 R16 R17 1 5 kO Resistor chip 1 16 W 596 603 Std Std R18 R19 510 Resistor chip 1 16 W 596 603 Std Std 6 32 NYL nuts NY HN 632 H620 ND Building Fasteners 4 ST1 ST2 ST3 4816 Standoff M F hex 6 32 NYL 0 500 inch 12 7 sf_thvt_325_rnd 4816 Keystone ST4 mm 8 TP1 TP2 TP3 White Test point white thru hole color keyed 0 100 x 0 100 inch 5002 Keystone TP4 TP5 TP6 2 54 mm x 2 54 TP7 TP8 mm 1 TP9 White Test point white thru hole color keyed 0 100 x 0 100 inch 5001 Keystone 2 54 mm x 2 54 mm 1 U1 bq24351DSG IC overvoltage and overcurrent charger front end SON 8 bq24351DSG TI 1 U2 bq2057CSN IC charge management one or two cell Li lon SOIC SN bq2057CSN TI or Li Pol charger 1 HPA666 PCB 2 8 inch x 2 8 i
14. isuas 5 Lg N3 OON cn 2 iva 1 uonporddo 1961049 003 Figure 4 Top Silk Screen SLUU455 October 2010 bq24351EVM for Li lon Charger Front End Protection IC Submit Documentation Feedback Copyright 2010 Texas Instruments Incorporated TEXAS INSTRUMENTS Bill of Materials Board Layout and Schematic www ti com C004 Figure 5 Top Assembly 10 bq24351EVM for Li lon Charger Front End Protection IC SLUUA455 October 2010 Submit Documentation Feedback Copyright O 2010 Texas Instruments Incorporated X TEXAS INSTRUMENTS Bill of Materials Board Layout and Schematic www ti com 43 Schematic 1vB T1vB VA lJeuoneJedo si 2 09 Jo sseoxe ul o oo o oo 49 9d Sof tof oo 8 ueBapuo umo Duis 61 15 4854049 Be 5 Ld 9d Sd rdf Bunes dnp 403203 1340 SNLWLS 1330
15. nch x 0 062 inch 7 11 cm x PCB Any 7 11 cm x 1 58 mm Notes 1 Number 0 in left side columns means do not use this component 2 Std in part number column means standard manufacturer s part number 6 bq24351EVM for Li lon Charger Front End Protection IC SLUUA455 October 2010 Copyright O 2010 Texas Instruments Incorporated Submit Documentation Feedback 1 TEXAS INSTRUMENTS www ti com Bill of Materials Board Layout and Schematic 42 Board Layout C001 Figure 2 Top Layer SLUUA455 October 2010 bq24351EVM for Li lon Charger Front End Protection IC 7 Copyright 2010 Texas Instruments Incorporated 1 TEXAS INSTRUMENTS Bill of Materials Board Layout and Schematic www ti com 002 Figure 3 Bottom Layer 8 bq24351EVM for Li lon Charger Front End Protection IC SLUUA455 October 2010 Copyright 2010 Texas Instruments Incorporated 1 TEXAS INSTRUMENTS www ti com Bill of Materials Board Layout and Schematic D2 R14 ACIN D3 R15 TP2 C GIN D4 R18 P3 u uonpoipul 5704045 1340 P4 GATDRV P5 U apis MO Bues 1340 U P6 P7 4 2 SOyoul BATEN D7 R17 Ipu 1961049 109 P9 Charging D6 R16 uonoojddo 3459 N d WAG 9 epis ubiH Charge Done N3 V 999VdH sjueuungisu R12 R13 C6 R1 4 29 Bu
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18. orated
19. pass transistors and current sense resistors These types of devices can be identified using the EVM schematic located in the EVM User s Guide When placing measurement probes near these devices during operation please be aware that these devices may be very warm to the touch Mailing Address Texas Instruments Post Office Box 655308 Dallas Texas 75265 Copyright O 2010 Texas Instruments Incorporated IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries Tl reserve the right to make corrections modifications enhancements improvements and other changes to its products and services at any time and to discontinue any product or service without notice Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete All products are sold subject to Tl s terms and conditions of sale supplied at the time of order acknowledgment TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with Tl s standard warranty Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty Except where mandated by government requirements testing of all parameters of each product is not necessarily performed TI assumes no liability for applications assistance or customer product design Customers are responsible for their products and applications using Tl compo
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