AP1685 Datasheet, PDF (1/14 Pages) Diodes Incorporated – OFFLINE, HIGH PF, HIGH EFFICIENCY LED DRIVER IC

A Product Line of
Diodes Incorporated
AP1685
Description
OFFLINE, HIGH PF, HIGH EFFICIENCY LED DRIVER IC
Pin Assignments
The AP1685 is a high performance AC/DC power factor corrector for
mains dimmable LED driver applications. The device uses Pulse
Frequency Modulation (PFM) technology to regulate output current
while achieving high power factor and low THD. It operates as a BCM
(Boundary Conduction Mode) which is good for EMI.
(Top View)
S1
7 Drain
The AP1685 internally integrates a 500V high voltage MOSFET which
can realize a lower BOM cost. The AP1685 provides accurate
constant current (CC) regulation while removing the opto-coupler and
secondary control circuitry. It also eliminates the need of loop
compensation circuitry while maintaining stability. It can meet the
requirement of IEC6100-3-2 harmonic standard.
The AP1685 features low start-up current, low operation current. It
adopts valley on switching mode to achieve high efficiency. It also has
rich protection features including over voltage, short circuit, over
temperature protection.
The AP1685 is available in SO-7 package.
Applications
 Non-dimmable LED drivers
CS 2
RI 3
GND 4
6 VCC
5 FB
SO-7
Features
 Boundary Conduction Mode (BCM) Operation to Achieve High-
efficiency
 High PF and Low THD (PF>0.9, THD<30%)
 High Efficiency
 Low Start-up Current
 Tight LED Current
 Tight LED Open Voltage
 Valley-mode Switching to Minimize the Transition Loss
 Internal Integrated 2.5A/500V MOSFET can Cover up to 10W
 Easy EMI
 Internal Protections:
 Under Voltage Lock Out (UVLO)
 Leading-edge Blanking (LEB)
 Output Short Protection
 Output Open Protection
 Over Temperature Protection
 Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
 Halogen and Antimony Free. “Green” Device (Note 3)
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.
AP1685
Document number: DS37311 Rev. 1 - 2
1 of 14
www.diodes.com
September 2014
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