Diodes Incorporated – AL3050: Programmable Dimming LED Driver with Integrated 30V MOSFET and Schottky

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The AL3050 is a current mode boost-type LED driver with programmable brightness dimming control for portable devices. With a 30V rated integrated MOSFET and power diode, the AL3050 can support up to 8 LEDs in series. The boost converter runs at 750kHz fixed switching frequency to reduce output ripple, improves conversion efficiency, and allows for the use of small external components. The default LED current is adjustable by an external resistor at FB pin and the feedback voltage is regulated to 200mV typically. The AL3050 provides PWM dimming mode and single wire digital dimming mode for accurate LED current control from CTRL pin.

FEATURES
• 2.7V to 5.5V input voltage range
• Integrated 0.7A/30V internal MOSFET and power diode
• 750kHz switching frequency
• 1-wire control interface
• Up to 100:1 PWM dimming ratio
• Built-in soft start, OTP and OCP
• 28V open LED protection (up to 8 LEDs)
• 200mV reference with ±3% accuracy
• Flexible digital and PWM brightness control PWM dimming control interface
• Integrated loop compensation
• U-DFN2020-6 package

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