AP1680 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
AP1680
The AP1680 is a high performance AC/DC power sup- _{· Primary Side Control for Rectangular Constant}
ply controller for LED drivers, battery charger and
Current and Constant Voltage Output
adapter applications. The device uses Pulse Frequency _{· Sub-microampere Start-up Current}
Modulation (PFM) method to build discontinuous con- _{· 30mW No-load Input Power Feasible}
duction mode (DCM) flyback power supplies.
· Tight CC Regulation Performance
The AP1680 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 AP1680 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 AP1680 is available in SOT-23-6 package.
· Short Circuit Protection
· SOT-23-6 Package
Applications
· LED Drivers
· Adapters/Chargers for Cell/Cordless Phones,
PDAs, MP3 and Other Portable Apparatus
· Standby and Auxiliary Power Supplies
Apr. 2011 Rev. 1. 0
SOT-23-6
Figure 1. Package Type of AP1680
BCD Semiconductor Manufacturing Limited
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