STEVAL-ISB032V1

S T E VA L - I S B 0 3 2 V 1 Li-Ion battery charger evaluation board based on STNS01 Data brief Description The STEVAL-ISB032V1 is a product evaluation board based on the STNS01, which is a linear charger for single-cell Li-Ion batteries integrating an LDO regulator and several battery protection functions. The device uses a CC/CV algorithm to charge the battery. The fast-charge current can be programmed using an external resistor. Pre- charge current and termination current are scaled accordingly. The floating voltage value is 4.2 V. The input supply voltage is normally used to charge the battery and provide power to the LDO regulator. When a valid input voltage is not present and the battery is not empty, the device automatically switches to battery power. The STNS01 integrates over-charge, over- discharge and overcurrent protection circuitry to prevent the battery from being damaged under fault conditions. It also features a charger enable Features input to stop the charging process when battery Charges single-cell Li-Ion batteries with CC- overtemperature is detected by external circuitry. CV algorithm and charge termination When shutdown mode is activated, the battery Charge current programmable up to 400 mA power consumption is reduced to less than 500 1% accuracy on floating voltage (4.2 V) nA to maximize battery life during shelf time. Integrated 3.1 V LDO regulator Automatic power path management Battery over-charge protection Battery over-discharge protection Battery overcurrent protection Charging timeout Very low battery leakage in over- discharge/shutdown mode Low quiescent current Charge/fault status output Charger enable input RoHS compliant January 2016 DocID027068 Rev 3 1/4 www.st.com For further information contact your local STMicroelectronics sales office Schematic diagram STEVAL-ISB032V1 1 Schematic diagram Figure 1: STEVAL-ISB032V1 circuit schematic LDO JP2 1 LDO 2 C2 GND 2.2uF JP1 R1 LDO VIN 600 2 VIN 1 GND U1 JP4 D1 USB IN STNS01 1 CHG 1 3 IN LDO 2 GND LED C1 CHG 2.2uF 5 CHG 6 LDO JP5 CEN JP3 4 SD 1 2 LDO 2 SYS 2 SYS CEN 1 3 R3 GND C3 GND 10 BATMS 2.2uF SYSTEM CEN 11 BATSNS 9 12 LDO JP6 ISET BAT 8 NTC 1 C4 R4 LDO 2 4.7uF SD R2 3 GND 10K SD CN1 JP7 VIN 5 1 VIN ADC IN NTC1 4 2 GND ADC EN 10K 3 3 GND 2 GND BATMS 1 R5 USB Micro-B JP8 0 1 BATSNS 2 BAT 3 NTC 4 GND BATTERY GSPG12092014DI1205 2/4 DocID027068 Rev 3 7 GND