L6563A STMicroelectronics

+ + L6563 L6563A Advanced transition-mode PFC controller Features Very precise adjustable output overvoltage protection SO-14 Tracking boost function Protection against feedback loop failure (Latched shutdown) Applications Interface for cascaded converter s PWM PFC pre-regulators for: controller HI-END AC-DC adapter/charger 2 Input voltage feedforward (1/V ) Desktop PC, server, WEB server Inductor saturation detection (L6563 only) IEC61000-3-2 OR JEIDA-MITI compliant Remote ON/OFF control SMPS, in excess of 350W Low ( 90A) start-up current Table 1. Device summary 5mA max. quiescent current Part number Package Packaging 1.5% ( T = 25C) internal reference voltage J L6563 SO-14 Tube -600/+800 mA totem pole gate driver with L6563TR SO-14 Tape & Reel active pull-down during UVLO L6563A SO-14 Tube SO14 package L6563ATR SO-14 Tape & Reel Figure 1. Block diagram INV COMP MULT VFF 123 5 2 1 / V TRACKING Ideal diode BOOST LINE VOLTAGE - FEEDFORWARD 6 1:1 TBO MULTIPLIER CURRENT + 4 MIRROR 2.5V LEADING-EDGE CS BLANKING 1.7V Voltage 1:1 VOLTAGE references BUFFER - + - + from REGULATOR VFF Vbias Q 3V INDUCTOR (INTERNAL SUPPLY BUS) VCC SATURATION DETECTION 14 ( not in L6563A ) SAT VCC 15 V R Q UVLO R1 COMPARATOR S 13 GD 12 + GND Driver UVLO - R2 VREF2 Starter OFF 11 ZERO CURRENT DETECTOR STARTER 1.4V 0.2V ZCD 0.26V 0.7V 10 - PFC OK RUN SAT 7 DISABLE LATCH 0.52V 0.6V Vbias FEEDBACK ON/OFF CONTROL FAILURE 2.5V (BROWNOUT DETECTION) 8 9 PROTECTION PWM STOP PWM LATCH March 2007 Rev 4 1/39 www.st.com 39 + - - + -Contents L6563 - L6563A Contents 1 Description . 3 1.1 Pin connection 4 1.2 Pin description 4 2 Absolute maximum ratings . 6 3 Thermal data . 6 4 Electrical characteristics . 7 5 Typical electrical performance 11 6 Application information . 16 6.1 Overvoltage protection . 16 6.2 Feedback Failure Protection (FFP) . 18 6.3 Voltage Feedforward 18 6.4 THD optimizer circuit 21 6.5 Tracking Boost function 23 6.6 Inductor saturation detection (L6563 only) 27 6.7 Power management/housekeeping functions 28 6.8 Summary of L6563/A idle states . 31 7 Application examples and ideas 32 8 Package mechanical data 37 9 Revision history . 38 2/39