NCP5050 pdf,datasheet

NCP5050 pdf,datasheet

4.5 W Flash White LED Boost Driver

The NCP5050 is a high powered fixed frequency PWM boost

converter opTImized for constant current applicaTIons such as driving

high-powered white LEDs. This device has been designed with

high-efficiency for use in portable applicaTIons and is capable of

driving up to 5 high power LEDs in series for camera flash or

flashlight (torch) applicaTIons. To support the need of driving the

LEDs in a high current pulse mode for flash as well as a continuous

mode for focus or torch, a control pin and support circuitry is

incorporated which allows the user to program two LED currents. The

both output current are fully configurable via the use of 2 external

resistors and this average current can be reduced by applying a PWM

signal to the CTRL pin up to 50 kHz.