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A8430

Allegro MicroSystems
Part Number A8430
Manufacturer Allegro MicroSystems
Description White LED Driver Constant Current Step-up Converter
Published Mar 14, 2007
Detailed Description www.DataSheet4U.com A8430 White LED Driver Constant Current Step-up Converter The A8430 is a noninverting boost convert...
Datasheet PDF File A8430 PDF File

A8430
A8430

Overview
www.
DataSheet4U.
com A8430 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.
The A8430 is provided in a 5-pin 3 mm x 3 mm MLP package (part number suffix EK), that has a nominal ...


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