AL8820 Datasheet, PDF (1/15 Pages) Diodes Incorporated – 40V, 2A BOOST/BUCK LED DRIVER

AL8820
40V, 2A BOOST/BUCK LED DRIVER
Description
Pin Assignments
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
these applications.
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
applications.
Features
 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%
 Internal Protections
 Under Voltage Lock Out (UVLO)
 Output Open/Short Protection
 Over Temperature Protection (OTP)
 SO-8EP
 Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
 Halogen and Antimony Free. “Green” Device (Note 3)
(Top View)
SW1 1
CS1 2
EP
FB 3
COMP 4
SO-8EP
Applications
 MR16 Lamps
 AR111
 General Illumination Lamps
8 SW2
7 VCC
6 VIN
5 CS2
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.
Typical Applications Circuit
L1
L2
Vac
D1 D2
D5
RSET2
D3
D4
R1
C1
C2 ^D6
C5
VOUT
R2
RSET1
RHYS
L3
SW1
SW2
CS1
VCC
C3
FB
VIN
COMP CS2
C4
(Exposed Pad)
AL8820
Document number: DS37369 Rev. 1 - 2
1 of 15
www.diodes.com
December 2014
© Diodes Incorporated