AP3983E Datasheet | Diodes Incorporated

Description The AP3983E is high frequency power switcher for power supplies with better conversion efficiency, better voltage & current accuracy, and improved protection functions. Typical applications include adapter for ADSL, home appliance power supply, LED lighting power supply and PC auxiliary power supplies. The AP3983E with built in MOSFET, regulates the output voltage and current in the primary side by piece-wise Pulse Frequency Modulation (p-PFM) in discontinuous conduction mode (DCM). The system operating frequency reduces linearly from heavy load to light load in each interval of the p-PFM, and enters constant current mode when the load current equals to the maximum system output current. The AP3983E provides operating frequency dithering function to improve EMC performance of power supply. The AP3983E also has built-in fixed cable voltage drop pensation and adjustable line voltage pensation. The AP3983E solution has fewer ponent number, smaller size, and lower total cost. The AP3983E is packaged in PDIP-7. Pin Assignments (Top View) CPC 1 FB 2 VCC 3 CS 4 7 GND 6D 5D PDIP-7 For AP3983E Applications - Adapters - Set Top Boxes - Auxiliary Supplies - Appliances - LED Driver Features - Primary Side Control for Eliminating Opto-coupler - Valley Switching Turn on for Higher Efficiency and Better EMI Performance - Better Transient Characteristics - Built-in N Channel MOSFET with 700 BVDSS - Low Start-up Current: 0.2A (Typ.) - Internal Output Cable Voltage Drop pensation - Hiccup Function to Improve Short Circuit Protection - Better Over Voltage Protection - Better Over Temperature Protection - Low Total Cost Solution - Output Power Range (Note 1) - AP3983E for 20W Adapter and 25W in Open Frame Design - Totally Lead-free & Fully Ro HS pliant (Note 2 & 3) - Halogen and Antimony Free. “Green” Device (Note 4) Note: 1. Typical continuous power in a non-ventilated enclosed adapter measured at +50°C ambient. 2. No purposely added lead. Fully EU Directive...