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LD7591GS データシート(PDF) 1 Page - Leadtrend Technology

部品番号 LD7591GS
部品情報  Transition-Mode PFC Controller with Fault Condition Protection
PDF  20 Pages
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メーカー  LEADTREND [Leadtrend Technology]
ホームページ  https://www.leadtrend.com.tw/
Logo LEADTREND - Leadtrend Technology

LD7591GS データシート(HTML) 1 Page - Leadtrend Technology

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LD7591
3/4/2010
1
Leadtrend Technology Corporation
www.leadtrend.com.tw
LD7591-DS-00 March 2010
Transition-Mode PFC Controller with Fault Condition Protection
REV. 00
General Description
The LD7591 is a voltage mode PFC controller operating on
transition mode, with several integrated functions of
protection, such as OVP, OCP, and Brown-in protection. It
reduces the components counts and is available in a
SOP-8 or DIP-8 package. Those make it an ideal design
for low cost applications.
It provides functions of low startup current, over voltage
protection, open feedback protection, disable function,
over current protection, under voltage lockout and
integrated LEB of current sensing. Unlike the traditional
current mode PFC controller, LD7591 is free from extra
rectified AC line voltage information to minimize the power
loss.
The LD7591 will be disabled if INV pin voltage falls below
0.45V and the operating current rises over 65μA
Typical Application for Boost PFC
Features
Transition mode of PFC pre-regulator
Voltage mode control
Programmable max. on-time
Low Startup Current (<30
μA)
UVLO (Under Voltage Lockout)
LEB (Leading-Edge Blanking) on CS Pin
Open-Feedback Protection and Disable Function
OVP (Over Voltage Protection)
OCP (Cycle by cycle current limiting)
800/-1200mA Driving Capability
Internal OTP function
Applications
Adaptor of Output above 65W.
Open Frame Switching Power Supply
LCD TV Power Supply
LED Power Supply
AC
Input
LD7591
8
5
3
7
4
6
GATE
CS
GND
ZCD
VCC
RAMP
EMI
Filter
1
INV
2
COMP


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