Texas Instruments WCSP-Packaged bq24272 User Manual Download

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User's Guide

SLUU916 – April 2012

WCSP-Packaged bq24272/273 Evaluation Modules

The bq24272/273 evaluation module is a complete charger module for evaluating compact, flexible, high-
efficiency, switch-mode charge management solution for single-cell, Li-ion and Li-polymer batteries used
in a wide range of portable applications.

Contents

Introduction

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1.1

bq2427x IC Features

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1.2

bq24272/273 EVM Features

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1.3

Schematic

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1.4

I/O Description

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1.5

Test Points

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1.6

Control and Key Parameters Setting

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1.7

Recommended Operating Conditions

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Test Summary

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2.1

Definitions

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2.2

Recommended Test Equipment

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2.3

Recommended Test Equipment Setup

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2.4

Recommended Test Procedure

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Printed-Circuit Board Layout Guideline

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Bill of Materials and Board Layout

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4.1

Bill of Materials

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4.2

Board Layout

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List of Figures

bq24272/273EVM (HPA759) Schematic (Sheet 1 of 2)

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bq24272/273EVM (HPA759) Schematic (Sheet 2 of 2)

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BAT_Load (PR1010) Schematic

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Connections of HPA172 Kit

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Original Test Setup for bq24272/273EVM (HPA759)

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Main Window of bq2427xSW Evaluation Software

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Top Assembly Layer

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Top Layer

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First Internal Layer

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Second Internal Layer

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Bottom Layer

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List of Tables

Bill of Materials - HPA759A

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C is a trademark of Philips Electronics N.V.

SLUU916 – April 2012

WCSP-Packaged bq24272/273 Evaluation Modules

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Summary of Contents for WCSP-Packaged bq24272

Page 1: ...ommended Test Equipment Setup 9 2 4 Recommended Test Procedure 12 3 Printed Circuit Board Layout Guideline 13 4 Bill of Materials and Board Layout 14 4 1 Bill of Materials 14 4 2 Board Layout 16 List of Figures 1 bq24272 273EVM HPA759 Schematic Sheet 1 of 2 3 2 bq24272 273EVM HPA759 Schematic Sheet 2 of 2 4 3 BAT_Load PR1010 Schematic 8 4 Connections of HPA172 Kit 9 5 Original Test Setup for bq242...

Page 2: ...9 SLUSB08 1 2 bq24272 273 EVM Features The bq24272 273 evaluation module EVM is a complete charger module for evaluating compact flexible high efficiency switch mode battery charge and power path management solution for single cell Li ion and Li polymer battery powered systems used in a wide range of portable applications Key EVM features include 76 2 mm 76 2 mm 1 2 mm footprint for entire solutio...

Page 3: ...duction 1 3 Schematic Figure 1 bq24272 273EVM HPA759 Schematic Sheet 1 of 2 3 SLUU916 April 2012 WCSP Packaged bq24272 273 Evaluation Modules Submit Documentation Feedback Copyright 2012 Texas Instruments Incorporated ...

Page 4: ...ain the suffix X may have been assembled with incorrectly marked ICs Regardless of the IC s marking the EVM was assembled with the correct part number as specified in the EVM bill of material 4 WCSP Packaged bq24272 273 Evaluation Modules SLUU916 April 2012 Submit Documentation Feedback Copyright 2012 Texas Instruments Incorporated ...

Page 5: ...negative header bq24272 only J9 BAT Battery positive header J10 BAT Battery positive terminal J10 GND Battery negative terminal J11 GND Battery negative header J12 DRV DRV reference voltage positive header J13 DRV DRV reference voltage positive terminal J13 GND DRV reference voltage negative terminal J14 GND DRV reference voltage negative header 1 5 Test Points Test Point Description TP1 Kelvin to...

Page 6: ...Connects the TS pin to an external thermistor The resistor divider formed by R1 and R3 has been sized to accommodate a 10 kΩ thermistor If a different thermistor is used R1 and R3 must be resized 1 7 Recommended Operating Conditions Min Typ Max Unit Supply voltage VIN Input voltage from ac adapter 4 2 10 V System voltage VSYS Voltage output at SYS terminal bq24272 only depends on 3 4 VBATR V VBAT ...

Page 7: ...ge across point XXX and YYY I JXX YYY Current going out from the YYY terminal of header XX Jxx BBB Terminal or pin BBB of header xx JPx ON Internal jumper Jxx terminals are shorted JPx OFF Internal jumper Jxx terminals are open JPx 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 ...

Page 8: ...y when connected to a power supply Figure 3 BAT_Load PR1010 Schematic 2 2 3 Load 2 Between SYS and GND Although not required a resistive load capable of sinking up to 3 A can be used 2 2 4 Meters Four equivalent voltage meters VM and two equivalent current meters CM are required The current meters must be able to measure 4 A current 2 2 5 Computer A computer with at least one USB port and a USB ca...

Page 9: ... status Alternatively the AutoRead function can be activated periodically updating the GUI with the IC s status 2 3 Recommended Test Equipment Setup 1 For all power connections use short twisted pair wires of appropriate gauge wire for the amount of the current 2 Set PS 1 for 6 V 3 A current limit and then turn the supply off 3 If BAT_Load as shown in Figure 1 is used connect PS 2 set to approxima...

Page 10: ...PIO Test Summary www ti com 10 After the preceding steps have been performed the test setup for HPA759 is configured as shown in Figure 5 Figure 5 Original Test Setup for bq24272 273EVM HPA759 10 WCSP Packaged bq24272 273 Evaluation Modules SLUU916 April 2012 Submit Documentation Feedback Copyright 2012 Texas Instruments Incorporated ...

Page 11: ...click IN DEVICE when prompted at start up The main window of the software is shown in Figure 6 Figure 6 Main Window of bq2427xSW Evaluation Software 11 SLUU916 April 2012 WCSP Packaged bq24272 273 Evaluation Modules Submit Documentation Feedback Copyright 2012 Texas Instruments Incorporated ...

Page 12: ... the Section 2 3 steps are followed 2 Connect the output of PS 1 in series with current meter multimeter 1 CM 1 to J1 and J3 or J2 IN GND 3 Connect voltage meter 1 VM 1 across J1 or TP1 and J3 IN GND 4 Move JP2 to HI 5 Turn on PS 1 and PS 2 if used 6 Return JP2 to LO 7 Software setup Press the READ button to obtain the current settings Set Write On Change to ON if not already set Set Reset Watchdo...

Page 13: ...apacitors close to their respective IC pins and as close as possible to PGND do not place components such that routing interrupts power stage currents All small control signals must be routed away from the high current paths 5 The PCB must have a ground plane return connected directly to the return of all components through vias two vias per capacitor for power stage capacitors one via per capacit...

Page 14: ... J13 ED555 2DS Terminal block 2 pin 6 A 3 5 mm 0 27 0 25 ED555 2DS OST 2 0 J4 J8 PEC02SAAN Header 2 pin 100 mil spacing 0 100 2 PEC02SAAN Sullins 1 1 J5 N2510 6002 RB Connector male straight 2 5 pin 100 mil spacing 4 wall 0 338 0 788 in N2510 6002 RB 3M 1 0 J6 ED555 2DS Terminal block 2 pin 6 A 3 5 mm 0 27 0 25 ED555 2DS OST 1 0 JP1 PEC03SAAN Header male 3 pin 100 mil spacing 0 100 in 3 PEC03SAAN ...

Page 15: ...P10 5002 Test point white thru hole color keyed 0 100 0 100 in 5002 Keystone 4 4 TP11 TP12 5002 Test point white thru hole color keyed 0 100 0 100 in 5002 Keystone TP13 TP14 1 0 U1 BQ24272RGE IC 2 5 A single input single cell switchmode Li Ion battery charger QFN 24 BQ24272RGE TI with power path management 0 1 U1 BQ24273RGE IC 2 5 A single input single cell switchmode Li Ion battery charger QFN 24...

Page 16: ...rd Layout www ti com 4 2 Board Layout Figure 7 Top Assembly Layer Figure 8 Top Layer 16 WCSP Packaged bq24272 273 Evaluation Modules SLUU916 April 2012 Submit Documentation Feedback Copyright 2012 Texas Instruments Incorporated ...

Page 17: ...ials and Board Layout Figure 9 First Internal Layer Figure 10 Second Internal Layer 17 SLUU916 April 2012 WCSP Packaged bq24272 273 Evaluation Modules Submit Documentation Feedback Copyright 2012 Texas Instruments Incorporated ...

Page 18: ...of Materials and Board Layout www ti com Figure 11 Bottom Layer 18 WCSP Packaged bq24272 273 Evaluation Modules SLUU916 April 2012 Submit Documentation Feedback Copyright 2012 Texas Instruments Incorporated ...

Page 19: ...ency energy and has not been tested for compliance with the limits of computing devices pursuant to part 15 of FCC or ICES 003 rules which are designed to provide reasonable protection against radio frequency interference Operation of the equipment 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 t...

Page 20: ... its gain should be so chosen that the equivalent isotropically radiated power e i r p is not more than that necessary for successful communication This radio transmitter has been approved by Industry Canada to operate with the antenna types listed in the user guide with the maximum permissible gain and required antenna impedance for each antenna type indicated Antenna types not included in this l...

Page 21: ...er you obtained the Technical Regulations Conformity Certification as provided in Radio Law of Japan with respect to this product Also please do not transfer this product unless you give the same notice above to the transferee Please note that if you could not follow the instructions above you will be subject to penalties of Radio Law of Japan Texas Instruments Japan Limited address 24 1 Nishi Shi...

Page 22: ... property damage personal injury or death If there are questions concerning these ratings please contact a TI field representative prior to connecting interface electronics including input power and intended loads Any loads applied outside of the specified output range may result in unintended and or inaccurate operation and or possible permanent damage to the EVM and or interface electronics Plea...

Page 23: ...ency energy and has not been tested for compliance with the limits of computing devices pursuant to part 15 of FCC or ICES 003 rules which are designed to provide reasonable protection against radio frequency interference Operation of the equipment 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 t...

Page 24: ... its gain should be so chosen that the equivalent isotropically radiated power e i r p is not more than that necessary for successful communication This radio transmitter has been approved by Industry Canada to operate with the antenna types listed in the user guide with the maximum permissible gain and required antenna impedance for each antenna type indicated Antenna types not included in this l...

Page 25: ...er you obtained the Technical Regulations Conformity Certification as provided in Radio Law of Japan with respect to this product Also please do not transfer this product unless you give the same notice above to the transferee Please note that if you could not follow the instructions above you will be subject to penalties of Radio Law of Japan Texas Instruments Japan Limited address 24 1 Nishi Shi...

Page 26: ... property damage personal injury or death If there are questions concerning these ratings please contact a TI field representative prior to connecting interface electronics including input power and intended loads Any loads applied outside of the specified output range may result in unintended and or inaccurate operation and or possible permanent damage to the EVM and or interface electronics Plea...

Page 27: ...regulatory and safety related requirements concerning its products and any use of TI components in its applications notwithstanding any applications related information or support that may be provided by TI Buyer represents and agrees that it has all the necessary expertise to create and implement safeguards which anticipate dangerous consequences of failures monitor failures and their consequence...

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