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AP3766

Description
LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER
File Size312KB,9 Pages
ManufacturerBCD Semi(Diodes)
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AP3766 Overview

LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER

Preliminary Datasheet
LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER
AP3766
General Description
The AP3766 is a high performance AC/DC power sup-
ply controller for battery charger and adapter applica-
tions. The device uses Pulse Frequency Modulation
(PFM) method to build discontinuous conduction
mode (DCM) flyback power supplies.
The AP3766 provides accurate constant voltage, con-
stant 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 SOT-23-6 package.
Features
·
·
·
·
·
·
·
·
·
·
·
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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
SOT-23-6 Package
Applications
·
·
·
Adapters/Chargers for Cell/Cordless Phones,
PDAs, MP3 and Other Portable Apparatus
LED Drivers
Standby and Auxiliary Power Supplies
SOT-23-6
Figure 1. Package Type of AP3766
Feb. 2010 Rev. 1. 0
1
BCD Semiconductor Manufacturing Limited

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