AP3971

A Product Line of Diodes Incorporated AP3965/66/71 PRIMARY SIDE POWER SWITCHER FOR FLYBACK/NON-ISOLATED BUCK SMPS Description 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. The AP3965 is packaged in SO7. The AP3966/71 is available in PDIP-7. Features 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 (Note 1): ƒ AP3965 for 5W Adapter and 3W Buck ƒ AP3966 for 10W Adapter and 4.5W Buck ƒ AP3971 for 12W Adapter and 5W Buck Totally Lead-free & Fully RoHS Compliant (Note 2 & 3) Halogen and Antimony Free. “Green” Device (Note 4) Pin Assignments M Package (SO7...