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RT9525 Datasheet(PDF) 2 Page - Richtek Technology Corporation |
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RT9525 Datasheet(HTML) 2 Page - Richtek Technology Corporation |
2 / 15 page RT9525 2 DS9525-01 May 2011 www.richtek.com Functional Pin Description Pin No. Pin Name Pin Function 1 TS Thermistor Monitor Input. The TS pin connects to a battery’s thermistor to determine if the battery is too hot or too cold to charge. If the battery’s temperature is out of range, charging is paused until it re-enters the valid range. TS also detect whether the battery (with NTC) is present or not 2, 3 BAT Battery Connect Pin. 4 EN Charge Enable, Active-low input. 200k Ω pull low. 5 EN2 6 EN1 Input Current Limit Configuration Setting. 7 PGOOD Power Good Status Output. Active-low, open-drain output. 8, 17 (Exposed Pad) GND Ground. The exposed pad must be soldered to a large PCB and connected to GND for maximum power dissipation. 9 CHG Charger Status Output. Active-low, open-drain output. 10, 11 SYS System Connect Pin. Connect this pin to system load with a minimum 10uF MLCC to GND. 12 NC No Internal Connection. 13 VIN Supply Voltage Input. 14 TIMER Safe Charge Timer Setting. 15 SYSOFF System Disconnect Pin. Pull SYSOFF high to disconnect SYS from battery, connect to GND for normal operation. Internally pulled up by 1 μA current source to BAT. 16 ISETA Charge Current Set Input. Connect a resistor (RISETA) between ISET and GND. Typical Application Circuit VIN GND RT9525 SYS 16 8, 17 (Exposed Pad) 2, 3 13 10, 11 BAT ISETA CBAT + CIN Adapter or USB 4 SYSOFF 15 RISETA 2.2µF 1µF 1 TS CSYS 10µF EN Chip Enable Disconnect Connect EN1 EN2 6 5 7 9 CHG TIMER 14 CTIMER 1µF PGOOD |
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