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 STEVAL-ISB006V1 Trickle charge mode at low battery voltage Main adaptor voltage up to 16 V current against the die high power dissipation or Battery overvoltage protection at 4.7 V high ambient temperature. An end of charge output pin indicates the charge termination when Gas gauge with 13 bit AD converter the fast charge current drops below 10% of the Battery voltage monitor with 7-12 bit ADC programmed current value. The STw4102 2 I C interface for device monitoring and control contains an accurate gas gauge based on a 13 bit AD converter. External resistor is used between Charge status output pin battery and ground to sense a charge/discharge Power detection output pin current. With a typical 30 m resistor, current can Programmable watchdog security timer be up to 2.5 A. 4.7 V LDO regulator (external MOSFET) Description The STEVAL-ISB006V1 demonstration board is based on the STw4102, a stand-alone constant- current 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 1/4 For further information contact your local STMicroelectronics sales office. www.st.com 4 Obsolete Product(s) - Obsolete Product(s)Circuit schematic STEVAL-ISB006V1 1 Circuit schematic Figure 1. Schematic AM03287v1 2/4 Obsolete Product(s) - Obsolete Product(s) Drv MAIN 1 C5 IC1 100nF/16V/X7R 1 2 MAIN VOUT 1 VOUT USB 3 S1 1 USBPWR 0R C6 19 SENSE 1 100nF/16V/X7R SENSE Vbat R2 24 Vbat BATT 10K PWRDETECTN PWRDT 20 1 BATT 1 21 BATTSENSE 1 EOCH 22 BSENSE C4 1 EOCHG 7 ISET 8 22uF/6.3V/X5R CVREF 1 R1 ISET STw4102 12K +/-1% C2 1 1uF/6.3V/X5R 10 CV IS M2B GNDBATT STS2DPFS20V 5 LDODRV 6 C1 LDOFB 1uF/6.3V/X5R VIO 1 13 C32 C32kHz 1 C7 R4 100nF/16V/X7R 10K 18 VIO 14 STBY STDBY 1 SCL 17 1 SCL 16 11 CG+ SDA ICG+ 1 SDA 1 15 RESETN 12 R3 ICG- RST R033 +/-1% 0805 1 M2A Epad S2 STS2DPFS20V CG- 1 0R TEST PHONE 1 M1 C3 STT4PF20V 22uF/6.3V/X5R GND10 1 GND6 GND11 1 1 BL1 GND3 GND7 GND12 1 1 1 LOGO PCB GND8 1 9 GND 4 Driver 1 23 1 TEST