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RT9503A Datasheet(PDF) 3 Page - Richtek Technology Corporation |
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RT9503A Datasheet(HTML) 3 Page - Richtek Technology Corporation |
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3 / 15 page  RT9503A 3 DS9503A-01 April 2011 www.richtek.com Function Block Diagram 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 Charge Input Selection ACIN/USB ACIN USB ISETA BATT ACIN P-MOSFET SENSE MOSFET USB P-MOSFET SENSE MOSFET GND Precharge Controller Logic Temperature Sense 1µA TS VCC/USB EN ISETU 1µA 7.5k 1.5k VFB DRV OVP + - 2.5V OVP Comparator - + BATT SYS VOS VH Hys Logic OVP AC_ON BAT_ON CHG_S Timer TIMER AC_PGOOD |
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