L6563 Datasheet, PDF (1/37 Pages) STMicroelectronics – ADVANCED TRANSITION-MODE PFC CONTROLLER

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% (@ T_J = 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
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