AP3703 データシートの表示（PDF） - BCD Semiconductor
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AP3703 Datasheet PDF : 11 Pages
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Preliminary Datasheet
LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER
General Description
Features
AP3703
The AP3703 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 · Secondary CV/CC Control Circuitry Eliminating
(PFM) method to build discontinuous conduction
Opto-Coupler
mode (DCM) flyback power supplies.
· No Need for Control Loop Compensation
Circuitry
The AP3703 provides accurate constant voltage, con- · Flyback Topology in DCM Operation
stant current (CV/CC) regulation while removing the
opto-coupler and secondary control circuitry. It also
·
Random Frequency Modulation to Reduce
eliminates the need of loop compensation circuitry
while maintaining stability. The AP3703 achieves
·
System EMI
Built-in Soft Start
excellent regulation and high average efficiency, yet · Open Feedback Protection
meets the requirement for no-load consumption less · Over Voltage Protection
than 100mW.
· Short Circuit Protection
· Small SOT-23-5 package to achieve compact size
The AP3703 is available in SOT-23-5 package.
and less component
Applications
· Adapters/Chargers for Cell/Cordless Phones,
PDAs, MP3 and Other Portable Apparatus
· Standby and Auxiliary Power Supplies
· LED Driver
Feb. 2009 Rev. 1.0
SOT-23-5
Figure 1. Package Type of AP3703
BCD Semiconductor Manufacturing Limited
1
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