ARC3C0845 Datasheet | Murata

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 & driver circuitry. With the proprietary architecture, the ARC3C0845/ARC3C0845W provides the highest efficiency (>94%) possible in a pact 3.44 mm x 2.415 mm WLCSP40 (ARC3C0845W) or 4 mm x 4 mm 32-pin LGA 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: 4.5V to 15V - Proprietary architecture for ultra-high LED efficiency, above 88% over the entire 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 3bit dithering - Supports linear/logarithmic analog and PWM dimming, or direct 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 non-volatile 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 and 3x charge pump ratio - Select table boost switching frequency from 320 KHz to 2.6 MHz ARC3C0845/ARC3C0845W Document Category: Product Specification High Efficiency LED Backlight Driver - Extensive fault protection...