AP1688 Datasheet, PDF (1/10 Pages) Diodes Incorporated – AC/DC, HIGH PF, HIGH EFFICIENCY, UNIVERSAL MAINS LED DRIVER CONTROLLER

A Product Line of
Diodes Incorporated
AP1688
AC/DC, HIGH PF, HIGH EFFICIENCY, UNIVERSAL MAINS LED DRIVER CONTROLLER
Description
The AP1688 is a high performance AC/DC PFC and constant current
controller for universal mains LED driver applications. The device is a
buck controller which operates as a boundary conduction mode
(BCM) to achieve high efficiency and easy EMI.
An open loop algorithm is adopted in the AP1688, which will make the
system achieve excellent line and load regulations with high PF for
universal mains input.
The AP1688 features fast start-up, low start-up current, low operation
current and high efficiency. It also has rich protection features
including over voltage, short and open circuit, over current, over
temperature protection.
The AP1688 is available in SO-8 package.
Pin Assignments
(Top View)
Features
 Optimized for Buck Topology
 Boundary Conduction Mode (BCM) Operation to Achieve High
Efficiency
 High Power Factor > 0.9
 High Efficiency > 90%
 System Current Accuracy: ±5%
 Good Line Regulation and Load Regulation
 Low Start-up Current
 Tight CC Regulation Performance for Universal Input Mains
Voltage Range
 Eliminates Control Loop Compensation Circuitry
 Easy EMI
 Open-load and Reload Detection
 Over Temperature Protection
 Over Current Protection
 Over Voltage and Short and Open Circuit Protection
 Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
 Halogen and Antimony Free. “Green” Device (Note 3)
NC 1
VS 2
VA 3
CS 4
8 VCC
7 OUT
6 GND
5 FB
Applications
 Universal Mains LED lighting
(SO-8/ M Package)
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
C1
VAC
BD1
TVS
L2
C2
R1
D2
R2
C3
R5
R7
C5
R6
8 _VCC
FB ⁵
2
VS
3 _VA
C6
OUT ⁷
GND
6
CS ⁴
+
D1
VOUT
C4
T1
-
R3
R4
Q1
RCS
AP1688
Document number: DS36603 Rev. 2 - 2
1 of 10
www.diodes.com
February 2015
© Diodes Incorporated