NOT RECOMMENDED FOR NEW DESIGN USE AL8860Q OR AL8861Q AL8807Q HIGH EFFICIENCY LOW 30V 1.3A AUTOMOTIVE COMPLIANT BUCK LED DRIVER Description Pin Assignments The AL8807Q is a step-down DC/DC converter designed to drive LEDs with a constant current. Depending on the forward voltage of the LEDs, the device can drive up to nine LEDs in series from a voltage source of (Top View) 6V to 30V. Series connection of the LEDs provides identical LED currents resulting in uniform brightness and eliminating the V SET requirement for ballast resistors. The AL8807Q switches at frequency IN up to 1MHz with controlled rise and fall times to reduce EMI. This GND N/C allows the use of small size external components, hence minimizing GND SW the PCB area needed. CTRL SW Maximum output current of AL8807Q is set via an external resistor connected between the V and SET input pins. Dimming is achieved IN MSOP-8EP by applying either a DC voltage or a PWM signal at the CTRL input pin. An input voltage of 0.4V or lower at CTRL switches off the output MOSFET simplifying PWM dimming. The AL8807Q has been qualified to AEC-Q100 Grade 1 and is automotive compliant supporting PPAP documentation. Applications Features LED Driving Current up to 1.3A Automotive Interior LED Lamps Better than 5% Accuracy Automotive Exterior LED Lamps High Efficiency up to 96% Optimally Controlled Switching Speeds Operating Input Voltage from 6V to 30V PWM/DC Input for Dimming Control Built-in Output Open-Circuit Protection Automotive Grade with AEC-Q100 Qualification MSOP-8EP: 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) 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) & 2015/863/EU (RoHS 3) compliant. 2. See AL8807Q Pin Descriptions Pin Name Pin Number Functions SET 1 Set Nominal Output Current Pin. Configure the output current of the device. GND 2, 3 GND Pin 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 Drive with DC voltage (0.5V < V < 2.5V) to adjust output current from 20% to 100% of I CTRL OUTnom A PWM signal (low level 0.4V and high level > 2.6 transition times less than 1s) 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 capacitorsee applications V 8 IN section for more information. Exposed pad/TAB connect to GND and thermal mass for enhanced thermal impedance. Should not be used as EP EP electrical ground conduction path. Functional Block Diagram Absolute Maximum Ratings ( T = +25C, unless otherwise specified.) A Symbol Parameter Ratings Unit ESD HBM Human Body Model ESD Protection 4000 V ESD MM Machine Model ESD Protection 300 V ESD CDM Charged Device Model ESD Protection 1000 V V Continuous V Pin Voltage Relative to GND -0.3 to +40 V IN IN V SW Voltage Relative to GND -0.3 to +40 V SW V CTRL Pin Input Voltage -0.3 to +6 V CTRL I DC or RMS Switch Current 1.6 A SW-RMS I Peak Switch Current (<10%) 2.5 A SW-PK T Junction Temperature +150 C J Lead Temperature Soldering +300 C T LEAD Storage Temperature Range -65 to +150 C T ST Caution: Stresses greater than the Absolute Maximum Ratings specified above, may cause permanent damage to the device. These are stress ratings only functional operation of the device at these or any other conditions exceeding those indicated in this specification is not implied. Device reliability may be affected by exposure to absolute maximum rating conditions for extended periods of time. Semiconductor devices are ESD sensitive and may be damaged by exposure to ESD events. Suitable ESD precautions should be taken when handling and transporting these devices. 2 of 17 March 2021 AL8807Q Diodes Incorporated www.diodes.com Document number: DS36904 Rev. 3 - 3