STEVAL-ISB006V1

STEVAL-ISB006V1 Dual USB/wall adapter Li-Ion battery charger with gas gauge demonstration board based on the STw4102 Data Brief Features ■ Constant current constant voltage (CCCV) charger ■ Dual charging source (main adaptor or USB cable) ■ Fast charge current control up to 1A for main adaptor and up to 500 mA for USB ■ Internal power device and sense resistor, option for external components for current higher than 1A ■ Programmable charge voltage (4.1 V, 4.2 V, 4.3 V, 4.35 V) with 1% accuracy ■ Thermal regulation ■ Trickle charge mode at low battery voltage ■ Main adaptor voltage up to 16 V ■ Battery overvoltage protection at 4.7 V ■ Gas gauge with 13 bit AD converter ■ Battery voltage monitor with 7-12 bit ADC ■ I2C interface for device monitoring and control ■ Charge status output pin ■ Power detection output pin ■ Programmable watchdog security timer ■ 4.7 V LDO regulator (external MOSFET) ) s ( ct u d o r P e t e l o s b O )- STEVAL-ISB006V1 current against the die high power dissipation or high ambient temperature. An end of charge output pin indicates the charge termination when the fast charge current drops below 10% of the programmed current value. The STw4102 contains an accurate gas gauge based on a 13 bit AD converter. External resistor is used between battery and ground to sense a charge/discharge current. With a typical 30 mΩ resistor, current can be up to 2.5 A. s ( t c u d o r P e t e l o s b O Description The STEVAL-ISB006V1 demonstration board is based on the STw4102, a stand-alone constantcurrent constant-voltage (CCCV) linear charger dedicated for Li-Ion battery. This device allows dual charging capability using the main input adaptor up to 1A (wall adaptor, car adaptor) or USB cable up to 500 mA without external component. Upper 1 A charging is possible by adding just one external transistor. This demonstration board offers programmable fast charge current up to 1A with external resistor. A thermal regulation circuitry limits the charge November 2008 Rev 1 For further information contact your local STMicroelectronics sales office. 1/4 www.st.com 4 C3 22uF/6.3V/X5R 1 M1 STT4PF20V 1 1 1 1 LOGO_PCB BL1 RST SDA SCL VIO EOCH 1 1 C6 100nF/16V/X7R 1 PWRDT USB C5 100nF/16V/X7R 10K R2 GND3 C7 100nF/16V/X7R C2 1uF/6.3V/X5R Vbat 1 3 1 R4 10K EOCHG GND8 GND7 1 1 1 Epad RESETN SDA SCL VIO LDOFB LDODRV CVREF GND6 15 16 17 18 6 5 8 22 24 PWRDETECTN USBPWR MAIN IC1 CV IS C32kHz STw4102 ISET BATTSENSE BATT SENSE VOUT GND12 1 GND11 1 GND10 1 STDBY 11 14 13 10 7 21 20 19 2 TEST 0R S2 ICG- ICG+ 12 R1 12K +/-1% S1 0R C1 1uF/6.3V/X5R t e l o PHONE M2A STS2DPFS20V M2B STS2DPFS20V 1 9 MAIN 4 2/4 Driver s b O t e l o GND P e TEST d o r t c u ) (s s b O 23 CG+ STBY C32 ISET BSENSE SENSE VOUT 1 CG- R3 R033 +/-1% 0805 1 1 1 1 1 Vbat 1 1 GNDBATT 1 22uF/6.3V/X5R C4 1 BATT Figure 1. 1 1 1 Drv Circuit schematic STEVAL-ISB006V1 Circuit schematic Schematic ) s ( ct r P e u d o AM03287v1 STEVAL-ISB006V1 2 Revision history Revision history Table 1. Document revision history Date Revision 27-Nov-2008 1 Changes Initial release. ) s ( ct u d o r P e t e l o ) (s s b O t c u d o r P e t e l o s b O 3/4 STEVAL-ISB006V1 ) s ( ct Please Read Carefully: u d o Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. r P e All ST products are sold pursuant to ST’s terms and conditions of sale. Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. t e l o No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. 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