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L6566B 数据表(PDF) 1 Page - STMicroelectronics

部件名 L6566B
功能描述  Multi-mode controller for SMPS
Download  51 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

L6566B 数据表(HTML) 1 Page - STMicroelectronics

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August 2007
Rev 1
1/51
51
L6566B
Multi-mode controller for SMPS
Features
Selectable multi-mode operation:
fixed frequency or quasi-resonant
On-board 700 V high-voltage start-up
Advanced light load management
Low quiescent current (< 3 mA)
Adaptive UVLO
Line feedforward for constant power capability
vs. mains voltage
Pulse-by-pulse OCP, shutdown on overload
(latched or autorestart)
Transformer saturation detection
Programmable frequency modulation for EMI
reduction
Latched or autorestart OVP
Brownout protection
-600/+800 mA totem pole gate driver with
active pull-down during UVLO
SO16N package
Applications
Hi-end AC-DC adapter/charger
LCD TV/monitor, PDP
digital consumer, IT equipment
single-stage PFC
SO16N
www.st.com
Figure 1.
Block diagram
+
-
+
-
ZERO CURRENT
DETECTOR
50 mV
100 mV
VCC
915
7
ZCD
COMP
VFF
CS
GD
4
11
GND
3
LINE VOLTAGE
FEEDFORWARD
1.5 V
+
-
4.5V
DIS
8
LATCH
LEB
14V
Ref erence
voltages
5
VCC
10
Internal supply
VREF
UVLO
VOLTAGE
REGULATOR
&
ADAPTIVE UVLO
FMOD
6
IC_LATCH
DISABLE
UVLO
Q
12
+
-
+
-
0.450V
0.485V
AC_OK
16
13
AC_FAIL
UVLO_SHF
VCC
5.7V
1
HV
SOFT-START
&
FAULT MNGT
14
SS
OSC
MODE/SC
+-
OSCILLATOR
R
S
Q
MODE SELECTION
&
TURN-ON LOGIC
OVERVOLTAGE
PROTECTION
15 µA
7.7V
OCP
PWM
TIME
OUT
TIME
OUT
+
-
Vth
BURST-MODE
LOW CLAMP
& DISABLE
OFF2
OFF2
Icharge
Hiccup-mode
OCP logic
3 V
400 uA
DRIVER
OCP2
6.4V
VCC
1 mA
OVPL
OVP
OVPL
OVP


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