AL3158
HIGH EFFICIENCY 1x/2x CHARGE PUMP FOR WHITE LED APPLICATIONS
NEW PRODUCT
Description
Pin Assignments
The AL3158 is a low noise, constant frequency charge pump DC/DC converter that uses a Dual mode load switch (1x), and (2x) conversion for white LED applications.
The AL3158 is capable of driving three groups of three LED channels at 20mA from a 2.
7V to 5.
5V input.
The current sinks may be operated using three simple PWM dimming inputs individually or in parallel for driving highercurrent LEDs.
Low external part counts (one 1µF flying capacitor and two 2.
2µF
capacitors at VIN and VOUT) make this part ideally suited for small, battery-powered applications.
AL3158 PWM dimming inputs ...