MAX8645X
Overview
The MAX8645X/MAX8645Y charge pumps drive up to eight white LEDs with regulated constant current for uniform intensity. The main group of LEDs (M1-M6) can be driven up to 30mA per LED for backlighting.
- Power Up to Eight LEDs Up to 30mA/LED Drive for Backlight Up to 400mA Total Drive for Flash
- Two Internal Low-Noise 200mA LDOs
- 94% Max/85% Avg Efficiency (PLED/PBATT) over Li+ Battery Discharge
- 0.2% Typical LED Current Matching
- Adaptive 1x/1.5x/2x Mode Switchover
- Flexible Brightness Control Single-Wire, Serial-Pulse Interface (32 Steps) 2-Bit Logic (Three Levels)
- Thermal TA Derating Function
- Low Input Ripple and EMI
- 2.7V to 5.5V Supply Voltage Range
- Soft-Start, Overvoltage, and Thermal-Shutdown Protection
