LM3519 - High Frequency Boost White LED Driver

National Semiconductor

Datasheet Details

Part number	LM3519
Manufacturer	National Semiconductor
File Size	1.35 MB
Description	High Frequency Boost White LED Driver
Datasheet	LM3519_NationalSemiconductor.pdf

The LM3519 drives up to 4 white LEDs with constant current to provide LCD backlighting in handheld devices.

a proprietary PFM regulation architecture with switching frequencies between 2MHz to 8MHz, minimizing inductor size. Over-voltage protection circuitry and high frequency operation permit the use of low-cost small output capacitors. During shutdown, the output is disconnected from the input in order to avoid leakage current path through the LEDs to ground. The LM3519 is available in a tiny 6-pin SOT23 package. Features n n n n n n n n n Drives 2 to 4 LEDs at 20mA Up to 30kHz PWM Dimming Control.

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Published: Sep 29, 2005 |