L6562

L6562 TRANSITION-MODE PFC CONTROLLER 1 ■ ■ Features REALISED IN BCD TECHNOLOGY TRANSITION-MODE CONTROL OF PFC PREREGULATORS PROPRIETARY MULTIPLIER DESIGN FOR MINIMUM THD OF AC INPUT CURRENT VERY PRECISE ADJUSTABLE OUTPUT OVERVOLTAGE PROTECTION ULTRA-LOW (≤70µA) START-UP CURRENT LOW (≤4 mA) QUIESCENT CURRENT EXTENDED IC SUPPLY VOLTAGE RANGE ON-CHIP FILTER ON CURRENT SENSE DISABLE FUNCTION 1% (@ Tj = 25 °C) INTERNAL REFERENCE VOLTAGE -600/+800mA TOTEM POLE GATE DRIVER WITH UVLO PULL-DOWN AND VOLTAGE CLAMP DIP-8/SO-8 PACKAGES ECOPACK® PFC PRE-REGULATORS FOR: – IEC61000-3-2 COMPLIANT SMPS Figure 1. Packages ■ DIP-8 SO-8 ■ Table 1. Order Codes Part Number L6562N L6562D L6562DTR Package DIP-8 SO-8 Tape & Reel ■ ■ ■ ■ ■ ■ ■ DESKTOP PC, MONITOR) UP TO 300W – HI-END AC-DC ADAPTER/CHARGER – ENTRY LEVEL SERVER & WEB SERVER ■ 2 Description 1.1 APPLICATIONS ■ (TV, The L6562 is a current-mode PFC controller operating in Transition Mode (TM). Pin-to-pin compatible with the predecessor L6561, it offers improved performance. Figure 2. Block Diagram COMP 2 1 INV + 2.5V 5pF VCC MULTIPLIER AND THD OPTIMIZER 40K MULT 3 4 CS VOLTAGE REGULATOR OVERVOLTAGE DETECTION - + 8 VCC 25 V R1 + R2 VREF2 ZERO CURRENT DETECTOR + 2.1 V 1.6 V STARTER - INTERNAL SUPPLY 7V R S UVLO Starter stop DRIVER Q 15 V 7 GD DISABLE 6 GND 5 ZCD November 2005 Rev. 8 1/16 L6562 2 Description (continued) The highly linear multiplier includes a special circuit, able to reduce AC input current distortion, that allows wide-range-mains operation with an extremely low THD, even over a large load range. The output voltage is controlled by means of a voltage-mode error amplifier and a precise (1% @Tj = 25°C) internal voltage reference. The device features extremely low consumption (≤70 µA before start-up and