AP3971 Overview
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...
AP3971 Key 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 pensation
- Random Frequency Modulation for Low EMI
- Short Circuit Protection
- Low Total Cost Solution
- Output Power Range (Note 1)
- AP3965 for 5W Adapter and 3W Buck
- AP3966 for 10W Adapter and 4.5W Buck