LED Driver With Adaptive Charge Pump DC/DC Converter

More LED Driver product information
The FAN5609 generates regulated output current from a battery with input voltage varying between 2.7V to 5V. Switch reconfiguration and fractional switching techniques are utilized to achieve high efficiency over the entire input voltage range. A proprietary internal circuitry continuously monitors each LED current loop and automatically adjusts the generated output DC voltage to the lowest minimum value required by the LED having the highest forward voltage. This adaptive nature of the FAN5609 eliminates the need for LED pre-selection (matching) and ensures operation at high efficiency. When the input voltage is sufficiently high to sustain the programmed current level in the LEDs the FAN5609 re-configures itself to operate as a linear Regulator and the DC-DC Converter is turned off. An internal two-bit digital to Analog converter provides programmability of the output currents. Only two 0.1F bucket capacitors and two 4.7F input/output capacitors are needed for proper operation.
Soft-start circuitry prevents excessive current draw during power on. The device has built-in short Circuit Protection
By Fairchild Semiconductor
FAN5609 's PackagesFAN5609 's pdf datasheet

FAN5609 Pinout, Pinouts
FAN5609 pinout,Pin out
This is one package pinout of FAN5609,If you need more pinouts please download FAN5609's pdf datasheet.

FAN5609 Application circuits
FAN5609 circuits
This is one application circuit of FAN5609,If you need more circuits,please download FAN5609's pdf datasheet.

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