LD7591GS datasheet(1/20 Pages) LEADTREND

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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

Số phần tương tự - LD7591GS

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
Leadtrend Technology	LD7592	764Kb / 15P	Transition-Mode PFC Controller with Fault Condition Protection REV. 00
	LD7592GN	764Kb / 15P	Transition-Mode PFC Controller with Fault Condition Protection REV. 00
	LD7592GS	764Kb / 15P	Transition-Mode PFC Controller with Fault Condition Protection REV. 00
	LD7592S	841Kb / 16P	Transition-Mode PFC Controller with Fault Condition Protection REV. 00
	LD7592SGN	841Kb / 16P	Transition-Mode PFC Controller with Fault Condition Protection REV. 00

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Mô tả tương tự - LD7591GS

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