AL8843Q

AL8843Q AUTOMOTIVE COMPLIANT 40V 3A STEP-DOWN LED DRIVER Description The AL8843Q is a hysteresis mode DC-DC step-down converter, designed for driving single or multiple series connected LEDs efficiently from a voltage source higher than the LED voltage. The device can operate from an input supply between 4.5V and 40V and provide an externally adjustable output current up to 3A. Depending upon supply voltage and external components, this converter can provide up to 60W of output power. The AL8843Q integrates the power switch and a high-side output current sensing circuit, which uses an external resistor to set the nominal average output current. Dimming can be realized by applying an external control signal to the CTRL pin. The CTRL pin will accept either a DC voltage signal or a PWM signal. The soft-start time can be adjusted by an external capacitor from the CTRL pin to Ground. Applying a voltage of 0.3V or lower to the CTRL pin will shut down the power switch. The AL8843Q is available in the thermally enhanced SO-8EP package and automotive compliant, qualified to AEC-Q100 Grade 1, supports PPAP documentations. Pin Assignments (Top View) GND 1 GND 2 SET 3 NC 4 EP SO-8EP 8 SW 7 SW 6 VIN 5 CTRL Applications Automotive Daytime Running Lights Automotive Front and Rear Fog Lights Automotive Turn/Stop Lights Automotive Dimmable Interior Lights Features Qualified to AEC-Q100 Grade 1 Wide Input Voltage Range: 4.5V to 40V Output Current up to 3A Internal 40V ND...