ARC3C0845 Datasheet | pSemi

Description The ARC3C0845/ARC3C0845W is an ultra-high efficiency DC-DC converter solution with integrated programmable current sinks that drive up to eight strings of LEDs. The ARC3C0845/ARC3C0845W integrates all MOSFETs and their control and driver circuitry. With its proprietary architecture, the ARC3C0845/ARC3C0845W provides the highest efficiency- up to 96%- possible in a pact 3.44 mm x 2.415 mm WLCSP 40-pin package (ARC3C0845W) or 4 mm x 4 mm 32-pin QFN package (ARC3C0845). The high switching frequency enables a small and low-profile solution size aligned to the needs of the latest mobile products. Features - Synchronous DC-DC converter with integrated FETs - 2- and 3-cell Li-ion battery input voltage for LED boost: 4.5V to 15V - Proprietary architecture for ultra-high LED efficiency, above 88% over the operating range - Integrated output disconnect switch - Up to 45V output for maximum flexibility in assignment of LEDs to strings and selection of LED forward voltage - Up to 12-bit dimming resolution with an additional 3-bit dithering - Linear/logarithmic analog and PWM dimming for maximum flexibility and resolution - LED brightness ramp up/down control with programmable ramp rate and linear/logarithmic ramp profiles - Phase-shifted PWM dimming among active strings to minimize audible noise - 1 MHz I2C 6.0-patible serial interface to program the brightness, or an external resistor on ISET pin to set the maximum brightness - Extensive programming capability with nonvolatile memory for storing user register settings - Eight independently enabled current sinks, up to 43 m A per current sink - External PWM input for fine dimming resolution - 0.5% current matching at 30 m A per current sink - Wide range of input and output voltages with 2x charge pump ratio - Selectable boost switching frequency from 320 k Hz to 2.6 MHz - Extensive fault protection, including boost overcurrent protection, output short circuit protection, output over-voltage protection, LED open and...