ADP8866ACPZ-R7 Integrated Circuits (ICs)

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1. DESCRIPTION

The ADP8866ACPZ-R7 combines a programmable backlight LED charge pump driver with automatic blinking functions. Nine LED drivers can be independently programmed at currents up to 25 mA. The current level, fade time, and blinking rate can be programmed once and executed autonomously on a loop. Separate fade-in and fade-out times can be set for the backlight LEDs. Driving all of this is a two-capacitor charge pump with gains of 1×, 1.5×, and 2×. This setup is capable of driving a maximum IOUT of 240 mA from a supply of 2.5 V to 5.5 V. A full suite of safety features including short-circuit, overvoltage, and overtemperature protection allows easy implementation of a safe and robust design. Additionally, input inrush currents are limited via an integrated soft start combined with controlled input to output isolation.

2. FEATURES

    1. Charge pump with automatic gain selection of 1×, 1.5×, and 2× for maximum efficiency

    2. 92% peak efficiency

    3. 9 independent and programmable LED drivers

    4. Each driver is capable of 25 mA (full scale)

    5. Each driver has 7 bits (128 levels) of nonlinear current settings

    6. Standby mode for <1 µA current consumption

    7. 16 programmable fade-in and fade-out times (0.0 sec to 1.75 sec) with choice of square or cubic rates

    8. Automated and customizable LED blinking

    9. Unique heartbeat mode for programmable double pulse lighting effects on 4 channels (D6 to D9)

  10. PWM input for implementing content adjustable brightness control (cABC)

  11. I2C compatible interface for all programming

  12. Dedicated reset pin and built-in power on reset (POR)

  13. Short circuit, overvoltage, and overtemperature protection

  14. Internal soft start to limit inrush currents

  15. Input to output isolation during faults or shutdown

  16. Operates down to VIN = 2.5 V, with undervoltage lockout (UVLO) at 1.9 V

  17. Small lead frame chip scale package (LFCSP)

3. APPLICATIONS

    1. Mobile display backlighting

    2. Mobile phone keypad backlighting

    3. LED indication and status lights

    4. Automated LED blinking