Manual Adjustable LED Driver

In many electronics-level adjustments such as LED drivers for LCD panel backlight controls, we can use AD5228. A manually adjustable LED driver is shown on figure below. The voltage across the white LED D1 is set by the AD5228 for the brightness control. A typical white LED with Vf of 3.5 V requires a resistor, R1, to limit U2 current […]

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TPS65552A Xenon Tube Flash Driver

The size of the photoflash charger circuit is greatly simplified and reduced by Texas Instrument (TI) TPS65552A. A photoflash capacitor charger based on this device is shown on the circuit diagram below. All the necessary¬† function such as charging controls, output feedback, charge completion status, insulated gate bipolar transistor (IGBT) driver, and circuit protections needed to implement a small, efficient […]

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TPS61059 White LED Driver for Photoflash or Movie Light

Manufacturers are starting to turn to new high power to provide a photoflash function for these low-light conditions called white-light LEDs. These LEDs output is a wide light spectrum and it’s compact and easy to control. Unlike Xenon gas-discharges tubes which require hundreds of volts to flash, white-light LEDs can be operated in very low voltages. Additionally, to provide lighting […]

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High-Power Long-Life Compact Fluorescent Lamp / Tube lamp Controller

We can use UBA2021 for 600 V lamp controller and half-bridge driver IC for high-power. The UBA2021 is a long-life CFL/TL applications. It’s equipped with over-power protection to delivers constant light output and improves safety. A driver circuit for an external half-bridge, an oscillator, and a control circuit for starting, preheating, ignition, lamp burning, and protection are included. A demo […]

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