參數(shù)資料
型號： L6566BTR
廠商： 意法半導(dǎo)體
英文描述： Multi-mode controller for SMPS
中文描述： 多模式開關(guān)電源控制器
文件頁數(shù)： 1/51頁
文件大?。?/td> 401K
代理商： L6566BTR
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
Figure 1.
Applications
■
Hi-end AC-DC adapter/charger
■
LCD TV/monitor, PDP
■
digital consumer, IT equipment
■
single-stage PFC
SO16N
www.st.com
Block diagram
+
-
PWM
+
-
ZERO CURRENT
DETECTOR
50 mV
100 mV
V
CC
9
15
7
ZCD
COMP
VFF
CS
GD
4
11
GND
3
LINE VOLTAGE
FEEDFORWARD
1.5 V
+
-
+
-
4.5V
DIS
8
LATCH
LEB
14V
Reference
voltages
Internal supply
5
V
CC
10
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
V
CC
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
TIME
OUT
TIME
OUT
+
-
Vth
BURST-MODE
LOW CLAMP
& DISABLE
OFF2
OFF2
I
charge
Hiccup-mode
OCP logic
3 V
400 uA
DRIVER
OCP2
+
-
6.4V
V
CC
1 mA
OVPL
OVP
OVPL
OVP
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參數(shù)描述
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