AP3765 Datasheet, PDF (1/9 Pages) BCD Semiconductor Manufacturing Limited – LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER

Preliminary Datasheet
LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER
General Description
Features
AP3765
The AP3765 is a high performance AC/DC power sup- _{· Primary Side Control for Rectangular Constant}
ply controller for battery charger and adapter applica-
Current and Constant Voltage Output
tions. The device uses Pulse Frequency Modulation _{· Sub-microampere Start-up Current}
(PFM) method to build discontinuous conduction _{· 30mW No-load Input Power Feasible}
mode (DCM) flyback power supplies.
· Tight CV Regulation Performance
The AP3765 provides accurate constant voltage, con- ^{· Eliminates Opto-coupler and Secondary CV/CC}
stant current (CV/CC) regulation while removing the
opto-coupler and secondary control circuitry. It also
·
Control Circuitry
Eliminates Control Loop Compensation Circuitry
eliminates the need of loop compensation circuitry ^{· Flyback Topology in DCM Operation}
while maintaining stability. The AP3765 achieves ^{· Random Frequency Modulation to Reduce}
excellent regulation and high average efficiency, yet
System EMI
meets the requirement for no-load consumption less · Built-in Soft Start
than 30mW.
· Open Feedback Protection
The AP3765 is available in SOT-23-6 package.
· 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
Feb. 2010 Rev. 1. 0
SOT-23-6
Figure 1. Package Type of AP3765
BCD Semiconductor Manufacturing Limited
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