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ADP8863 数据表(PDF) 11 Page - Analog Devices |
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ADP8863 数据表(HTML) 11 Page - Analog Devices |
11 / 48 page ADP8863 Rev. 0 | Page 11 of 48 THEORY OF OPERATION The ADP8863 combines a powerful LED charge pump driver with independent control of up to seven LEDs. These LED drivers can sink up to 30 mA (typical) on six channels. The seventh LED can also be driven to 60 mA (typical). All LEDs can be individually programmed or combined into a group to operate backlight LEDs. A full set of safety features, including short-circuit, overvoltage, and overtemperature protection with input-to-output isolation, allows for a robust and safe design. The integrated soft start limits inrush currents at startup, restart attempts, and gain transitions. GND2 nINT VOUT CIN VIN STNDBY EN VIN VIN VBAT C1+ SDA SCL VDDIO STANDBY SWITCH CONTROL CURRENT SINK CONTROL C1– C2+ C2– nRST NOISE FILTER 50µs RESET D2 D3 D4 D5 D6 D7 CMP_IN D1 ID1 ID2 ID3 ID4 ID5 ID6 ID7 SOFT START OPTIONAL PHOTOSENSOR GND1 CLK UVLO VREFS IREFS COUT ISS VIN GAIN SELECT LOGIC CHARGE PUMP LOGIC LIGHT SENSOR LOGIC PHOTOSENSOR CONVERSION CHARGE PUMP (1×, 1.5×, 2×) C1 1µF C2 1µF I2C LOGIC VALS Figure 25. Detailed Block Diagram |
类似零件编号 - ADP8863 |
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类似说明 - ADP8863 |
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