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ADP8861 Folha de dados(PDF) 11 Page - Analog Devices |
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ADP8861 Folha de dados(HTML) 11 Page - Analog Devices |
11 / 40 page ADP8861 Rev. 0 | Page 11 of 40 THEORY OF OPERATION The ADP8861 provides a powerful charge pump driver with programmable LED control. Up to seven LEDs can be indepen- dently driven up to 30 mA (typical) each. 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 suite 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. I2C LOGIC C1 1µF C2 1µF GND2 nINT COUT VOUT CIN VIN VIN VREFS IREFS STNDBY EN 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 D1 ID1 ID2 ID3 ID4 ID5 ID6 ID7 VIN GND1 CLK UVLO SOFT START ISS CHARGE PUMP LOGIC GAIN SELECT LOGIC CHARGE PUMP (1×, 1.5×, 2×) Figure 24. Detailed Block Diagram |
Nº de peça semelhante - ADP8861 |
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Descrição semelhante - ADP8861 |
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