Cypress AN2309, CY8C29x66, CY8C24794 specifications Document History, Ecn

Page 21

AN2309

Document History

Document Title: Power Management - Low-Cost, Two-Cell Li-Ion/Li-Pol Battery Charger with Cell-Balancing Support

Document Number: 001-17394

Rev.

ECN

Orig. of

Submission

Description of change

Change

Date

 

 

 

 

 

 

 

Obtain spec. # for note to be added to spec. system. Update

**

1352043

HMT

08/29/2007

copyright. Add source disclaimer, revision disclaimer, Samples

Request Form link, PSoC App. Note Index link. Same title in DMS,

 

 

 

 

 

 

 

 

.doc, and web.

 

 

 

 

Old app. Note: made further changes to already updated app

 

 

 

 

notes. Changed title to make text more searchable on the web.

*A

1736124

VICK

11/29/2007

Corrected copyright and revision disclaimer. The attached .pdf file

 

 

 

 

has been stamped. **this note had no technical updates. There is

 

 

 

 

an associated project but it was not updated.**

*B

2612415

AESA

11/25/2008

Project updated and retested on PD5.0 SP1. Document history

table added. Updated text about the author.

 

 

 

 

PSoC is a registered trademark of Cypress Semiconductor Corp. "Programmable System-on-Chip," PSoC Designer, and PSoC Express are trademarks of Cypress Semiconductor Corp. All other trademarks or registered trademarks referenced herein are the property of their respective owners.

In March of 2007, Cypress recataloged all of its Application Notes using a new documentation number and revision code. This new documentation number and revision code (001-xxxxx, beginning with rev. **), located in the footer of the document, will be used in all subsequent revisions.

Cypress Semiconductor 198 Champion Court San Jose, CA 95134-1709Phone: 408-943-2600Fax: 408-943-4730

http://wwwHT.cypress.comTH

© Cypress Semiconductor Corporation, 2006-2008. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in a Cypress product. Nor does it convey or imply any license under patent or other rights. Cypress products are not warranted nor intended to be used for medical, life support, life saving, critical control or safety applications, unless pursuant to an express written agreement with Cypress. Furthermore, Cypress does not authorize its products for use as critical components in life-support systems where a malfunctionn or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress against all charges.

This Source Code (software and/or firmware) is owned by Cypress Semiconductor Corporation (Cypress) and is protected by and subject to worldwide patent protection (United States and foreign), United States copyright laws and international treaty provisions. Cypress hereby grants to licensee a personal, non-exclusive, non-transferable license to copy, use, modify, create derivative works of, and compile the Cypress Source Code and derivative works for the sole purpose of creating custom software and or firmware in support of licensee product to be used only in conjunction with a Cypress integrated circuit as specified in the applicable agreement. Any reproduction, modification, translation, compilation, or representation of this Source Code except as specified above is prohibited without the express written permission of Cypress.

Disclaimer: CYPRESS MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARD TO THIS MATERIAL, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Cypress reserves the right to make changes without further notice to the materials described herein. Cypress does not assume any liability arising out of the application or use of any product or circuit described herein. Cypress does not authorize its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress’ product in a life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress against all charges.

Use may be limited by and subject to the applicable Cypress software license agreement.

November 25, 2007

Document No. 001-17394 Rev. *B

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Contents Introduction Application Note AbstractQcell 1 Qcell Cell-Balancing FoundationCcell 1 Vcell 1 Ccell 2 Vcell Cell Ccell 1 VcellIchargeN Icharge IbalN IbalN VcellNRdischargeN RloadTwo-Cell Battery Charger Hardware Two-Cell Battery Charger with Cell-Balancing Support Device Schematic BAT2 + C9 PSoC Device InternalsR15 Battery MeasurementVref Gina V Vbat Max NmaxNnew nold N4.2 V new N4.2 V oldTwo-Cell Battery Charger Algorithm Two-Cell Battery Charger FirmwareTwo-Cell Battery Charger State Diagram Two-Cell Battery Charger Firmware Flowchart Part Cell-Balancing Algorithm Cell-Balancing Algorithm Parameter Unit Description Charging Parameters Two-Cell Battery Charger ParametersConclusion Cell-Balancing ParametersCharge/Discharge and Cell-Balancing Profile Examples AppendixCell-Balancing Activity Profile Cell-Balancing Parameter Profile Screen About the AuthorECN Document History