White LED Driver Constant Current Step-up Converter

The A8430 is a noninverting boost converter that steps-up the input voltage, to provide a programmable constant current output at up to 36 V for driving white LEDs in series. Driving LEDs in series ensures identical currents and uniform brightness. Up to four white LEDs CAN be driven at 20 mA from a single cell Li-ion or a multicell NiMH power source. Up to seven white LEDs CAN be driven by increasing the supply voltage up to 10 V.
The A8430 incorporates a power Switch and feedback sense Amplifier to provide a solution with minimum external components. The output current CAN be set by adjusting a single external sense resistor and CAN be varied with a voltage or filtered PWM signal when dimming control is required. The high switching frequency of 1.2 MHz allows the use of small inductor and capacitor values.
By Allegro MicroSystems, Inc.
A8430 's PackagesA8430 's pdf datasheet

A8430 Pinout, Pinouts
A8430 pinout,Pin out
This is one package pinout of A8430,If you need more pinouts please download A8430's pdf datasheet.

A8430 Application circuits
A8430 circuits
This is one application circuit of A8430,If you need more circuits,please download A8430's pdf datasheet.

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