AP3706 Datasheet, PDF (1/2 Pages) BCD Semiconductor Manufacturing Limited – PRIMARY SIDE CONTROL IC FOR OFF-LINE BATTERY CHARGERS

Product Brief
PRIMARY SIDE CONTROL IC FOR OFF-LINE BATTERY CHARGERS
AP3706
Description
Parametric Table
The AP3706 is a high performance AC/DC power supply
controller for battery charger and adapter applications.
The device uses Pulse Frequency Modulation (PFM)
method to build discontinuous conduction mode (DCM)
flyback power supplies.
The AP3706 provides constant voltage, constant current
(CV/CC) regulation without requiring an opto-coupler
and secondary control circuitry. It also eliminates the need
of loop compensation circuitry while maintaining stabil-
ity.
The AP3706 achieves excellent regulation and high power
efficiency, the no-load power consumption is less than
200mW at 265VAC input.
Startup Current (µA)(Typ)
UVLO Threshold on/off (V) (Typ)
Operating Current (µA) (Typ)
Standby Power (W)
Package
70
18.5/7.4
680
<0.3
SOIC-8
Applications
· Adapters/Chargers for Cell/Cordless Phones, PDAs,
MP3 and Other Portable Apparatus
· Standby and Auxiliary Power Supplies
Features
· 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
Benefits
· High Power Efficiency for Battery Chargers
· Low Total Cost
Additional Available Materials
· Samples
· Preliminary Datasheet
· ESD Report
· Demo Board
· Application Note
Mar. 2008
BCD Semiconductor Manufacturing Limited