AP3766 Datasheet, PDF (1/8 Pages) BCD Semiconductor Manufacturing Limited – LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER

A Product Line of
Diodes Incorporated
AP3766
LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER
Description
The AP3766 is a high performance AC/DC power supply controller for
LED drivers, battery charger and adapter applications. The device
uses Pulse Frequency Modulation (PFM) method to build
discontinuous conduction mode (DCM) flyback power supplies.
The AP3766 provides accurate constant voltage, constant current
(CV/CC) regulation while removing the opto-coupler and secondary
control circuitry. It also eliminates the need of loop compensation
circuitry while maintaining stability. The AP3766 achieves excellent
regulation and high average efficiency, yet meets the requirement for
no-load consumption less than 30mW.
The AP3766 is available in SOT26 package.
Pin Assignments
(Top View)
Pin 1 Mark
OUT 1
GND 2
VCC 3
6 FB
5 GND
4 CS
Features
 Primary Side Control for Rectangular Constant Current and
Constant Voltage Output
 Sub-microampere Start-up Current
 30mW No-load Input Power Feasible
 Tight CC Regulation Performance
 Eliminates Opto-coupler and Secondary CV/CC Control Circuitry
 Eliminates Control Loop Compensation Circuitry
 Flyback Topology in DCM Operation
 Random Frequency Modulation to Reduce System EMI
 Built-in Soft Start
 Open Feedback Protection
 Short Circuit Protection
 SOT26 Package
 Totally Lead-free & Fully RoHS Compliant (Notes 1 & 2)
 Halogen and Antimony Free. “Green” Device (Note 3)
SOT26
Applications
 LED Drivers
 Adapters/Chargers for Cell/Cordless Phones, PDAs, MP3 and
Other Portable Apparatus
 Standby and Auxiliary Power Supplies
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
+
C1
R1
R2
+
C2
D1
T1
D2
VO+
R5 C3
NP
C4 ⁺
Ns
D3
VO-
VCC
R3
OUT
AP3766
CS
FB
R4
GND
NFB
Q1 _R6
R7
Rs
AP3766
Document number: DS37658 Rev.2 - 2
5V/700mA Output for Battery Charger of Mobile Phone
1 of 8
www.diodes.com
December 2014
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