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GX64 APPLICATION NOTE

Charging Interface

Reference:

WI_DEV_Gx64_APN_002

Version:

001

Date:

2007/01/30

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Summary of Contents for GX64

Page 1: ...GX64 APPLICATION NOTE Charging Interface Reference WI_DEV_Gx64_APN_002 Version 001 Date 2007 01 30...

Page 2: ...ames mentioned may be filed or registered trademarks of their respective owners Copyright This manual is copyrighted by WAVECOM with all rights reserved No part of this manual may be reproduced in any...

Page 3: ...1 3 NOTATION 6 2 Built in Charge Circuitry 7 2 1 OVERVIEW 7 2 1 1 GR GS64 CHARGING BLOCK DIAGRAM 7 2 1 2 APPLICATION CHARGING BLOCK DIAGRAM 8 2 2 IMPLEMENTATION 8 2 2 1 HARDWARE 8 2 2 2 SOFTWARE IMPLE...

Page 4: ...greement Ce document est la propri t exclusive de WAVECOM Il ne peut tre communiqu ou divulgu des tiers sans son autorisation pr alable Table of Figures Figure 1 GR GS64 Charge Circuitry Block Diagram...

Page 5: ...rging algorithm Application requirements are A charger voltage and current limited to 5 5V and 500mA respectively with a reverse current protection diode CPS A Li Ion battery pack with a built in Ther...

Page 6: ...ul or interesting information Tip Provides advice suggestions guidance or recommendations which augment the formal text Caution Cautionary information must be heeded it draws the readers attention to...

Page 7: ...connected between VCC and GND of the system connector The Li Ion battery must include a thermistor with one side connected to GND and the other connected to ADIN1 of the system connector so that the...

Page 8: ...mplementation and general hardware usage 2 2 1 1 Charging Power Supply CPS To charge a single cell Li Ion battery a voltage and current limited power supply is required between the CHG_IN input of the...

Page 9: ...uld be the same GR64001 2 8V RBIAS RTH nom values should be the same GR64002 1 8V to 2 8V RBIAS RTH nom values should be the same GR64002 2 8V to 5 0V The value of RBIAS should be selected so that the...

Page 10: ...40 C To permanently program these four levels into the Wireless CPU the following sequence should be performed for each temperature Place the whole application or only the battery with the included Th...

Page 11: ...e Wireless CPU You should receive CBC 0 capacity The important parameter is the 0 following CBC Take the temperature above 4 C Ensure that charging resumes by sending AT CBC to the Wireless CPU You sh...

Page 12: ...after a high power hub is detected GPIOx can be set high causing the resistance to ground to be 15 0k 4 42k 3 41k which corresponds to 400mA 2 3 Operation The GR GS64 power supply implementation usin...

Page 13: ...e The state diagram shows how different HW signals affect the Wireless CPU These states can also be changed using AT CFUN fun command If the CPS is connected or enabled while the battery voltage is to...

Page 14: ...power supplies listed below directly to National Semiconductors 3 1 DC DC version The implementation shown in Appendix B is the reference design of a 5V DC DC buck regulator from National Semiconduct...

Page 15: ...la propri t exclusive de WAVECOM Il ne peut tre communiqu ou divulgu des tiers sans son autorisation pr alable 3 2 AC DC version The implementation shown in Appendix A is the reference design of a 5V...

Page 16: ...safely charge and maintain a single Li Ion Polymer battery operating off an AC wall adapter or the USB power VUSB Input power source selection of USB AC is automatic With both power sources present th...

Page 17: ...sans son autorisation pr alable Figure 5 LM3658 Implementation Block Diagram 4 1 2 Charging from AC DC or DC DC Adapter When the LM3658 is accepting charge from the AC DC or DC DC adapter the Iset pin...

Page 18: ...is the sole and exclusive property of WAVECOM Not to be distributed or divulged without prior written agreement Ce document est la propri t exclusive de WAVECOM Il ne peut tre communiqu ou divulgu des...

Page 19: ...is the sole and exclusive property of WAVECOM Not to be distributed or divulged without prior written agreement Ce document est la propri t exclusive de WAVECOM Il ne peut tre communiqu ou divulgu des...

Page 20: ...3 esplanade du Foncet 92442 Issy les Moulineaux Cedex France Tel 33 0 1 46 29 08 00 Fax 33 0 1 46 29 08 08 Wavecom Inc 4810 Eastgate Mall Second Floor San Diego CA 92121 USA Tel 1 858 362 0101 Fax 1...

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