40V, 2A BOOST/BUCK LED DRIVER
The AL8820 is a highly integrated high performance LED driver
optimized for MR16/AR111 and other similar LED lamp applications.
With a proprietary control scheme, the LED driver is compatible with
many commonly used electronic transformers and meets High Power
Factor (PF) and low Total Harmonic Distortion (THD) requirements for
The device integrates two DC/DC converters. The Two stage design
offers superior performance for MR16/AR111 applications. The first
stage is a boost PFC stage which improves PF, reduces EMI, powers
up the Buck stage and the compatibility of Electronic Transformers.
The Buck stage regulates the LED current thru the setting of external
sense resistor. The integrated low RDSON of integrated MOSFETs
reduce the conduction power loss. A compact thermally efficient SO-
8EP package, the AL8820 provides an ideal solution for MR16/AR111
Wide Input Voltage Range: 5V to 36V
Internal 40V NDMOS Switch
2A Output Current
Continuous Conduction Mode (CCM) Operation
Up to 1MHz Switching Frequency
High PF > 0.9 and Low THD < 30% and Low Ripple < 20%
Under Voltage Lock Out (UVLO)
Output Open/Short Protection
Over Temperature Protection (OTP)
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
General Illumination Lamps
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"
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.
Typical Applications Circuit
Vac D1 D2
C1 C2 D6
C4 (Exposed Pad)
Document number: DS37369 Rev. 1 - 2
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