AP8800A
AP8800A is COST EFFECTIVE 28V BUCK 1-W LED DRIVER manufactured by Diodes Incorporated.
COST EFFECTIVE 28V BUCK 1-W LED DRIVER
Description
The AP8800A is a step-down DC/DC converter designed to drive LEDs with a constant current. The device can drive up to 7 LEDs, depending on the forward voltage of the LEDs, in series from a voltage source of 8V to 28V. Series connection of the LEDs provides identical LED currents resulting in uniform brightness and eliminating the need for ballast resistors. The AP8800A switches at frequency up to 600k Hz. This allows the use of small size external ponents, hence minimizing the PCB area needed.
Maximum output current of AP8800A is set via an external resistor connected between the VIN and SET input pins. Dimming is achieved by applying either a DC voltage or a PWM signal at the CTRL input pin. An input voltage of 0.2V or lower at CTRL switches off the output MOSFET simplifying PWM dimming.
Pin Assignments
(Top View)
SW 1 GND 2 CTRL 3
5 VIN 4 SET
Features
- LED driving current up to 370m A
- Better than 5% accuracy
- High efficiency up to 95%
- Operating input voltage from 8V to 28V
- Simple, versatile solution requiring only 4 ponents
- PWM/DC input for dimming control
- Built-in output open-circuit protection
- TSOT25: Available in “Green” Molding pound (No Br, Sb) with lead Free Finish/ Ro HS pliant
- Totally Lead-Free & Fully Ro HS pliant (Notes 1 & 2)
- Halogen and Antimony Free. “Green” Device (Note 3)
Applications
- MR16 Lamps
- General Illumination Lamps
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (Ro HS) & 2011/65/EU (Ro HS 2) pliant. 2. See http://.diodes. 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 pounds.
Typical Applications Circuit
Document number: DS35100 Rev. 3
- 2
1 of 13 .diodes.
August 2012
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