AL8807BQMP-13 Diodes Incorporated

NOT RECOMMENDED FOR NEW DESIGN USE AL8860Q OR AL8861Q AL8807BQ AUTOMOTIVE GRADE 30V 1.3A PWM DIMMABLE BUCK LED DRIVER Description Pin Assignments The AL8807BQ is a step-down DC/DC converter designed to drive (Top View) LEDs with a constant current. The device can drive up to 9 LEDs, depending on the forward voltage of the LEDs, in series from a SET V voltage source of 6V to 30V. Series connection of the LEDs provides IN identical LED currents resulting in uniform brightness and eliminating N/C GND the need for ballast resistors. The AL8807BQ switches at frequency GND SW up to 1MHz with controlled rise and fall times to reduce EMI. This allows the use of small size external components, hence minimizing CTRL SW the PCB area needed. MSOP-8EP Maximum output current of AL8807BQ is set via an external resistor connected between the V and SET input pins. Dimming is IN achieved by applying a PWM signal at the CTRL input pin. An input Applications voltage of 0.4V or lower at CTRL switches off the output MOSFET Automotive Lamps simplifying PWM dimming. Features LED driving current up to 1.3A Better than 5% accuracy High efficiency up to 96% Optimally controlled switching speeds Operating input voltage from 6V to 30V PWM input for dimming control Open-Circuit LED protection LED Chain Short Circuited Over-Temperature Protection MSOP-8EP Available in Green Molding Compound (No Br, Sb) with lead Free Finish/ RoHS Compliant Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. Green Device (Note 3) Automotive Grade Qualified to AEC-Q100 Standards for High Reliability PPAP Capable (Note 4) Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See AL8807BQ Pin Descriptions Pin Pin Name Function Number SET 1 Set Nominal Output Current Pin. Configure the output current of the device. GND 2, 3 GND Pins Dimming and On/Off Control Input. Leave floating for normal operation. (V = V = 2.5V giving nominal average output current I = 0.1/R ) CTRL REF OUTnom S CTRL 4 Drive to voltage below 0.4V to turn off output current A PWM signal ( 2.5V) allows the output current to be adjusted below the level set by the resistor connected to SET input pin. SW 5, 6 Switch Pin. Connect inductor/freewheeling diode here, minimizing track length at this pin to reduce EMI. N/C 7 no connection Input Supply Pin. Must be locally decoupled to GND with > 2.2F X7R ceramic capacitor see 8 V IN applications section for more information. Exposed pad/TAB connects to GND and thermal mass for enhanced thermal impedance. Should not be EP EP used as electrical ground conduction path. Functional Block Diagram 2 of 19 March 2021 AL8807BQ Diodes Incorporated www.diodes.com Document number: DS37011 Rev. 2 - 3