AP3983E HIGH FREQUENCY PRIMARY SIDE POWER SWITCHER FOR OFF-LINE SMPS Description Pin Assignments The AP3983E is high frequency power switcher for power supplies with better conversion efficiency, better voltage & current accuracy, (Top View) and improved protection functions. Typical applications include adapter for ADSL, home appliance power supply, LED lighting power CPC 1 7 GND supply and PC auxiliary power supplies. The AP3983E with built in MOSFET, regulates the output voltage and current in the primary side FB 2 by piece-wise Pulse Frequency Modulation (p-PFM) in discontinuous conduction mode (DCM). The system operating frequency reduces 6 D 3 VCC 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 D 4 5 CS maximum system output current. PDIP-7 For AP3983E The AP3983E provides operating frequency dithering function to improve EMC performance of power supply. The AP3983E also has built-in fixed cable voltage drop compensation and adjustable line Applications voltage compensation. Adapters The AP3983E solution has fewer component number, smaller size, Set Top Boxes and lower total cost. Auxiliary Supplies Appliances The AP3983E is packaged in PDIP-7. 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 BV DSS 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) AP3983E for 20W Adapter and 25W in Open Frame Design Totally Lead-free & Fully RoHS Compliant (Note 2 & 3) Halogen and Antimony Free. Green Device (Note 4) Note: 1. Typical continuous power in a non-ventilated enclosed adapter measured at +50C ambient. 2. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 3. See AP3983E Typical Applications Circuit F1 L1 C6 R8 C7 C8 R9 Vo+ R4 C5 Np + + D1 to D4 R1 L2 R3 J1 + + D7,D8 C1 AC 90-264V C2 D5 Vo- R7 Ns R2 D6 T1 + C3 Nfb CY1 3 U1 5,6 VCC D R6 1 C4 7 CPC GND 2 FB CS 4 C9 R5 R12 R13 For AP3983E (12V/1.5A) Item Function QTY Item Function QTY C1, C2 15F/400V, electrolytic 2 U1 AP3983E, PDIP-7 1 C3 4.7F/50V, electrolytic 1 R1, R2 2M, 1206 2 C4 10nF, ceramic, 0805 1 R3 1 200, 1206 C5 1nF/250V, ceramic 1 R4 150k, 1206 1 C6 1nF/100V, 0805 1 R5 1 22k, 1%, 0805 C7, C8 1000F/16V, electrolytic 2 R6 47k, 1%, 0805 1 C9 10pF/16V, 0805 1 R7 1 2, 1206 CY1 1 R8 1 1nF/250V , Y1 capacitor 30, 1206 AC D1 to D6 1N4007, rectifier diode 6 R9 5.1k,1206 1 D7, D8 MBR3100, Schottky diode 2 R12 1.2, 1%, 1206 1 F1 2A/250V, fuse 1 R13 1.8, 1%, 1206 1 L1 30mH, Common inductor, EE9.8 1 T1 EE20 core, PC40, transformer 1 L2 250H/2A, Common inductor 1 2 of 10 AP3983E June 2016 Diodes Incorporated www.diodes.com Document number: DS38875 Rev. 3 - 2 ADVANCED INFORMATION NEW PRODUCT