General DescriptionThe AP3765 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.

Features
• Primary Side Control for Rectangular Constant
Current and Constant Voltage Output
• Sub-microampere Start-up Current
• 30mW No-load Input Power Feasible
• Tight CV Regulation Performance
• 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
• Built-in Soft Start
• Open Feedback Protection
• 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

Manufacturer	Diodes Incorporated
Product Category	AC DC Converters, Offline Switchers
Series	-
Packaging	Alternate Packaging
Package-Case	SOT-23-6
Operating-Temperature	-40°C ~ 150°C (TJ)
Mounting-Type	Surface Mount
Supplier-Device-Package	SOT-26
Watt	-
Output-Isolation	Isolated
Internal-Switch-s	No
Voltage-Breakdown	-
Topology	Flyback
Voltage-Start-Up	15.5V
Voltage-Supply-Vcc-Vdd	6.8 V ~ 35 V
Duty-Cycle	-
Frequency-Switching	80kHz
Fault-Protection	Over Temperature, Over Voltage, Short Circuit
Control-Features	-