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5.0V/4.5V 0.1A out 2mA 1MHz → Charge pump SOT-23-6 TSOT-23-6 WDFN2x2-6 RT9277C 2.5V-5.5V
https://www.richtek.com/~/media/AN PDF/SG012_03_EN.pdf
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Chip Enable 0.1uF to 10uF Pre-Charge Phase Fast Charge Phase Constant Voltage Phase & Standby Phase Re-Charge Phase Programmed Charge Current
https://www.richtek.com/assets/product_file/RT9505/DS9505-02.pdf
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7A Single Cell Smart Cap Divider and Direct Charge Charger with 8-Channel ADC, USB BC 1.2
https://www.richtek.com/assets/product_file/RT9756/DS9756-01.pdf
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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
https://www.richtek.com/assets/product_file/RT9503A/DS9503A-01.pdf
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ΔV PRECH 50 100 200 mV Pre-Charge Current I PCHG V BATT = 2V 8 10 12 % Recharge Threshold BATT Re-Charge Falling Threshold Hysteresis ΔV RE CH _L V
https://www.richtek.com/assets/product_file/RT9513/DS9513-01.pdf
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5 IEOC End-of-Charge Current Setting
https://www.richtek.com/assets/product_file/RT9524/DS9524-01.pdf
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task will remain in constant voltage mode to hold the battery in a full charge condition
https://www.richtek.com/assets/product_file/RT9526A/DS9526A-03.pdf
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8A Single Cell Smart Cap Divider and Direct Charge Charger with 8-Channel ADC, USB BC 1.2
https://www.richtek.com/assets/product_file/RT9756A/DS9756A-01.pdf
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the battery will run out quickly and users have to charge the battery frequently
设计支持 ▶ 技术文件 ▶ Power Management for Video Doorbell
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by using a control algorithm including pre-charge mode, fast charge mode and constant voltage mode
https://www.richtek.com/assets/product_file/RT9536H/DS9536H-01.pdf
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