ld7522 Leadtrend Technology, ld7522 Datasheet

ld7522

Manufacturer Part Number

ld7522

Description

Smart Green-mode Pwm Controller With Multiple Protections

Manufacturer

Leadtrend Technology

Datasheet

1.LD7522.pdf (17 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

H&T Electronics

Part Number:

ld7522HPS

Quantity:

90 000

Company:

Meier Automation Equipment Co., Limited

Part Number:

ld7522PS

Manufacturer:

Quantity:

20 000

Current page: 1 of 17
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REV:03

General Description

The LD7522 is a low startup current, current mode PWM

controller with green-mode power-saving operation. The

SOP-8/DIP-8 package integrated functions such as the

leading- edge blanking of the current sensing, internal slope

compensation, line compensation, and several protection

features. The protection functions include cycle-by-cycle

current limit, OVP, OTP, OLP, and brownout protection. It

provides the users a high efficiency, low external component

counts solution for AC/DC power applications.

Furthermore, to satisfy various protection requirements,

both latch-mode protection and auto-recoverable protection

can be easily achieved by configuring LD7522 on different

operation modes.

The special green-mode control is not only to achieve the

low power consumption but also to offer a non-audible-noise

operation when the LD7522 is operating under light load or

no load condition.

-Patent Pending

Typical Application

Leadtrend Technology Corporation

LD7522-DS-03 January 2008

Smart Green-Mode PWM Controller with Multiple Protections

input

Filter

EMI

www.leadtrend.com.tw

(-)LATCH

BNO

OVP

LD7522

VCC

GND COMP

Features

Applications

High-Voltage CMOS Process with Excellent ESD

protection

Very Low Startup Current (< 35μA)

Current Mode Control

Non-audible-noise Green Mode Control

UVLO (Under Voltage Lockout)

LEB (Leading-Edge Blanking) on CS Pin

Internal Slope Compensation

Programmable Line Compensation

OVP (Over Voltage Protection)

OLP (Over Load Protection)

OTP (Over Temperature Protection) through a NTC

Brownout Protection

Flexibility on Latch/Auto-Recoverable Protection Mode

500mA Driving Capability

Switching AC/DC Adaptor and Battery Charger

Open Frame Switching Power Supply

LCD Monitor/TV Power

OUT

photocoupler

TL431

LD7522

1/16/2008

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