AL8843QSP-13

AL8843Q AUTOMOTIVE COMPLIANT 40V 3A STEP-DOWN LED DRIVER Description Pin Assignments (Top View) 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. 8 SW 7 SW 3 6 VIN 4 5 CTRL GND 1 GND 2 SET NC EP SO-8EP 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. 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 NDMOS Switch Typical 4% Output Current Accuracy Single Pin for On/Off and Brightness Control by DC Voltage or PWM Signal Recommended Analog Dimming Range: 10% to 100% Soft-Start High Efficiency (Up to 97%) LED Short Protection Inherent Open-Circuit LED Protection Over Temperature Protection (OTP) Up to 1MHz Switching Frequency SO-8EP Package Available in Green Molding Compound (No Br, Sb) Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3) The AL8843Q suitable for automotive applications requiring specific change control; this part is AEC-Q100 qualified, PPAP capable, and manufactured in IATF 16949 certified facilities. https://www.diodes.com/quality/product-definitions/ Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant. 2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free. 3. Halogen- and Antimony-free "Green” products are defined as those which contain