AP3706_08 Datasheet, PDF (1/13 Pages) BCD Semiconductor Manufacturing Limited – PRIMARY SIDE CONTROL IC FOR OFF-LINE BATTERY CHARGERS

Data Sheet
PRIMARY SIDE CONTROL IC FOR OFF-LINE BATTERY CHARGERS AP3706
General Description
Features
The AP3706 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 AP3706 provides constant voltage, constant cur-
rent (CV/CC) regulation without requiring an opto-
coupler and secondary control circuitry. It also elimi-
nates the need of loop compensation circuitry while
maintaining stability.
The AP3706 achieves excellent regulation and high
power efficiency, the no-load power consumption is
less than 200mW at 265VAC input.
The AP3706 is available in SOIC-8 and DIP-8 pack-
ages.
· Primary Side Control for Rectangular Constant
Current and Constant Voltage Output
· 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
· Valley Turn on of External Power NPN Transistor
· Built-in Soft Start
· Open Circuit Protection
· Over Voltage Protection
· Short Circuit Protection
Applications
· Adapters/Chargers for Cell/Cordless Phones,
PDAs, MP3 and Other Portable Apparatus
· Standby and Auxiliary Power Supplies
Jul. 2008 Rev. 1.3
SOIC-8
DIP-8
Figure 1. Package Types of AP3706
BCD Semiconductor Manufacturing Limited
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