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NCP5050 pdf,datasheet

消耗积分:5 | 格式:rar | 大小:161 | 2010-04-22

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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.

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