AL8807BQ Datasheet, PDF (1/18 Pages) Diodes Incorporated – AUTOMOTIVE GRADE 30V 1.3A PWM DIMMABLE BUCK LED DRIVER

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
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
voltage source of 6V to 30V. Series connection of the LEDs provides
identical LED currents resulting in uniform brightness and eliminating
the need for ballast resistors. The AL8807BQ switches at frequency
up to 1MHz with controlled rise and fall times to reduce EMI. This
allows the use of small size external components, hence minimizing
the PCB area needed.
Maximum output current of AL8807BQ is set via an external resistor
connected between the VIN and SET input pins. Dimming is
achieved by applying 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.
SET
GND
GND
CTRL
Applications
 Automotive Lamps
(Top View)
MSOP-8EP
V_IN
N/C
SW
SW
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 http://www.diodes.com/quality/lead_free.html 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 <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
4. Automotive products are AEC-Q100 qualified and are PPAP capable. Automotive, AEC-Q100 and standard products are electrically and thermally the
same, except where specified. For more information, please refer to http://www.diodes.com/quality/product_compliance_definitions/.
Typical Application Circuit
AL8807BQ
Document number: DS37011 Rev. 1 - 2
1 of 18
www.diodes.com
October 2014
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