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RT9503 Datasheet(PDF) 3 Page - Richtek Technology Corporation |
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RT9503 Datasheet(HTML) 3 Page - Richtek Technology Corporation |
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3 / 15 page  RT9503 3 DS9503-03 April 2011 www.richtek.com Function Block Diagram Charge Input Selection ACIN/USB ACIN USB ISETA BATT ACIN P-MOSFET SENSE MOSFET USB P-MOSFET SENSE MOSFET Thermal Sense VREF 2.5V 0.25V 0.5V GND Precharge Loop Controller + - 0.25V Logic Temperature Sense Temperature Fault + - Charge Disable 0.9V 1uA TS Termination Comparator VCC/USB EN ISETU 1uA 7.5k 1.5k VREF Thermal Sense VFB DRV OVP + - 2.5V OVP Comparator - + BATT SYS VOS VH Hys Logic OVP AC_ON BAT_ON CHG_S PGOOD 125 C Timer TIMER Pre-Charge Phase Fast Charge Phase Constant Voltage Phase & Standby Phase Re-Charge Phase Programmed Charge Current 4.1V Recharge Threshold 2.8V Precharge Threshold 1/10 Programmed Charge Current Charge Complete Battery Voltage Charging Current Charging I-V Curve |
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