SP7683 Overview
The SP7683 is high efficiency Charge Pump which regulates up to four white LEDs with matching current. Based on the supply headroom available for the four precision current sinks, SP7683 automatically switches between 1X and 1.5X modes. The part powers up in 1X mode, with low quiescent current of 70uA (typ) and remains in 1X mode as long as the LED current has not decreased by more than 0.5%.
SP7683 Key Features
- 2.7V to 5.5V Input Voltage Range
- Up to 4 LEDS with matching currents
- LEDs can be Driven from the Charge Pump Output
- 1X and 1.5X Mode Charge Pump
- High Efficiency Operation
- 1.2 MHz Switching Frequency
- Programable LED Drive Capabliity
- PWM Dimming Control
- Low 0.5µA Shutdown Current
- Soft-Start Limits Inrush Current