The MAX1576 charge pump drives up to 8 white LEDs with regulated constant current for uniform intensity. The main group of LEDs (LED1-LED4) can be driven up to 30mA per LED for backlighting. The flash group of LEDs (LED5-LED8) are independently controlled and can be driven up to 100mA per LED (or 400mA total). By utilizing adaptive 1x/1.5x/2x charge-pump modes and very-low-dropout current regulators, the MAX1576 achieves high efficiency over the full 1-cell lithium-battery voltage range. The 1MHz fixed-frequency switching allows for tiny external components, and the regulation scheme is optimized to ensure low EMI and low input ripple. The MAX1576 uses two external resistors to set the main and flash full-scale (100%) LED currents. Four control pins are used for LED dimming by either serial control or 2-bit logic per group. ENM1 and ENM2 set the main LEDs to 10%, 30%, or 100% of full scale. ENF1 and ENF2 set the flash LEDs to 20%, 40%, or 100% of full scale. In addition, connect either pair of control pins together for single-wire, serial pulse dimming control. The MAX1576 is available in a 24-pin thin QFN, 4mm x 4mm package (0.8mm max height). Applications * Camera Phones * Cell Phones/Smartphones * LCD Backlights * LED Camera Flashes * PDAs, Digital Cameras, and Camcorders https://elecena.pl/product/22316614/480ma-white-led-1x-1-5x-2x-charge-pump-for-backlighting-and-camera-flash 2022-12-27 https://elecena.pl/product/22316614/480ma-white-led-1x-1-5x-2x-charge-pump-for-backlighting-and-camera-flash 2025-01-22