AP3983BMTR-G1

AP3983B/C/D HIGH FREQUENCY PRIMARY SIDE POWER SWITCHER FOR OFF-LINE SMPS Description Pin Assignments The AP3983B/C/D are series of high frequency power switcher for power supplies with better conversion efficiency, better voltage & current accuracy, and improved protection functions. Typical applications include charger, adapter for ADSL, home appliance power supply, LED lighting power supply and PC auxiliary power supplies. The AP3983B/C/D 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. (Top View) CPC 1 7 FB 2 VCC 3 6 D CS 4 5 D GND SO-7 For AP3983B/C The AP3983B/C/D has good transient characteristics. Typically, minimal voltage of 4.3V at PCB side can be achieved for dynamic test of 5V application system. (Top View) The AP3983B/C/D provides operating frequency dithering function to improve EMC performance of power supply. The AP3983B/C/D also has built-in fixed cable voltage drop compensation and adjustable line voltage compensation. CPC 1 FB 2 The AP3983B/C/D solution has fewer component number, smaller size, and lower total cost. VCC CS The AP3983B/C is packaged in SO-7. The AP3983C/D is packaged in PDIP-7. 7 GND 3 6 D 4 5 D PDIP-7 For AP3983C/D Features    Primary Side Control for Eliminating Opto-coupler Better Transient Characteristics Built-in N Channel MOSFET with 650 BVDSS        Low Start-up Current: 0.2A (Typ.) Internal Output Cable Voltage Drop Compensation Hiccup Function to Improve Short Circuit Protection Better Over Voltage Protection Better Over Temperature Protection Low Total Cost Solution Output Power Range (Note 1):   AP3983B for 6W Adapter AP3983C (SO-7) for 7.5W AP3983C (PDIP-7) for 10W Adapter AP3983D for 18W Adapter Totally Lead-Free & Fully RoHS Compliant (Notes 2 & 3) Halogen and Antimony Free. “Green” Device (Note 4) Notes: Applications      Adapters Set Top Boxes Auxiliary Supplies Appliances LED Driver 1. Typical continuous power in a non-ventilated enclosed adapter measured at +50°C ambient. 2. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 3. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free. 4. Halogen- and Antimony-free "Green” products are defined as those which contain