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L6563

Advanced transition-mode PFC controller

STMicroelectronics 

L6563

L6563A

Advanced transition-mode PFC controller

General features

■ Transition-mode control of PFC pre-regulators

■ Very precise adjustable output overvoltage

protection

■ Tracking boost function

■ Protection against feedback loop failure

(Latched shutdown)

■ Interface for cascaded converter's PWM

controller

■ Input voltage feedforward (1/V2)

■ Remote ON/OFF control

■ Low (≤90µA) start-up current

■ 5mA max. quiescent current

■ 1.5% (@ TJ = 25°C) internal reference voltage

■ -600/+800 mA totem pole gate driver with

active pull-down during UVLO

■ SO14 package

Block diagram

SO-14

Applications

PFC pre-regulators for:

■ HI-END AC-DC adapter/charger

■ Desktop PC, server, WEB server

■ IEC61000-3-2 OR JEIDA-MITI compliant

SMPS, in excess of 250W

Order code

Part number

L6563

L6563TR

L6563A

L6563ATR

Package

SO-14

SO-14

SO-14

SO-14

Packaging

Tube

Tape & Reel

Tube

Tape & Reel

INV

COMP

MULT

VFF

1

2

3

5

TBO 6

TRACKING

BOOST

1:1

CURRENT

MIRROR

-

+

2.5V

1:1

BUFFER

VOLTAGE

from REGULATOR

1 / V2

Ideal diode

LINE VOLTAGE

MULTIPLIER

FEEDFORWARD

V o lta g e

r e fe r e n c e s

-+

1.7V

-+

4

LEADING-EDGE

CS

BLANKING

3V

VFF

V b ia s

(INTERNAL SUPPLY BUS)

INDUCTOR

SATURATION

Q

V CC

14

V CC

DETECTION

( not in L6563A ) SAT

RQ

15 V

12

GND

UVLO

R1 COMPARATOR

S

+

D riv e r

13

GD

R2

-

VREF2

UVLO

11

ZCD

1.4V

0.7V

ZERO CURRENT

DETECTOR

Starter

OFF

STARTER

0.2V

0.3V

10

-

RUN

0.52V

0.62V

ON/OFF CONTROL

(BROWNOUT DETECTION)

D IS A B L E

9

PWM_STOP

SAT

LATCH

Vbias FEEDBACK

F A IL U R E

8

D E T E C T IO N

PWM_LATCH

PFC_OK

7

2.5V

November 2006

Rev 3

1/37

www.st.com

37

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