ARC3C0845 Overview
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. The high switching frequency enables a small and low-profile solution size aligned to the needs of the latest mobile products.
ARC3C0845 Key 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
