High Frequency Boost White LED Driver With High-Speed PWM Brightness Control

The LM3519 drives up to 4 white LEDs with constant current to provide LCD backlighting in handheld devices. The LED current is internally set to 20mA. The series connection allows the LED current to be identical for uniform brightness and minimizes the number of traces to the LEDs Brightness control is achieved by applying a PWM signal on enable with frequencies up to 30kHz.
The LM3519 features 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.
By National Semiconductor Corporation
Part Manufacturer Description Datasheet Samples
LM3519MK-20/NOPB Texas Instruments High Frequency Boost White LED Driver with High-Speed PWM Brightness Control 6-SOT-23-THIN -40 to 85
LM3519MKEV Texas Instruments High Frequency Boost White LED Driver with High-Speed PWM Brightness Control
LM3519 's PackagesLM3519 's pdf datasheet
LM3519MKEV
LM3519MK-20 TSOT
LM3519MKX-20 TSOT




LM3519 Pinout, Pinouts
LM3519 pinout,Pin out
This is one package pinout of LM3519,If you need more pinouts please download LM3519's pdf datasheet.

LM3519 Application circuits
LM3519 circuits
This is one application circuit of LM3519,If you need more circuits,please download LM3519's pdf datasheet.


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