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The AP3965/66/71 consists of a primary side regulation controller and
a high voltage transistor, and is specially designed for off-line power
supplies within 12W output power or non-isolated buck applications
within 5W. Typical applications include adapter for ADSL, auxiliary
supplies or open frame types for appliances.
The AP3965/66/71 operates at pulse frequency modulation (PFM),
and provides accurate constant voltage, constant current (CV/CC)
regulation without requiring an opto-coupler and secondary control
circuitry. It has internal cable compensation function for tight constant
voltage regulation.
The AP3965/66/71 solution has fewer component numbers, smaller
size, and lower total cost.
• Primary Side Control for Eliminating Opto-coupler and
• Secondary CV/CC Control Circuitry
• Built-in NPN Transistor with 700VCBO
• Low Start-up Current: 0.2μA (Typ)
• Internal Output Cable Voltage Drop Compensation
• Random Frequency Modulation for Low EMI
• Short Circuit Protection
• Low Total Cost Solution
• Output Power Range
• Totally Lead-free & Fully RoHS Compliant
• Halogen and Antimony Free. “Green” Device
• Adapters
• Set Top Boxes
• Auxiliary Supplies
• Appliances
