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LD7535A

Green-Mode PWM Controller

Unspecified 

LD7535/LD7535A

12/11/2007

Green-Mode PWM Controller with Integrated Protections

Rev. 01c

General Description

The LD7535/LD7535A are low cost, low startup current,

current mode PWM controllers with green-mode power-

saving operation. The integrated functions include the

leading-edge blanking of the current sensing, internal slope

compensation and the tiny package of SOT-26. They

provide the users a superior AC/DC power application of

higher efficiency, low external component counts, and lower

cost solution.

Furthermore, LD7535/LD7535A features more protections

like OLP (Over Load Protection) and OVP (Over Voltage

Protection) to eliminate the external protection circuits. And

to satisfy different designs, 2 versions of OVP levels are

implemented as ---

z LD7535 --- 28.0V ± 1.5V.

z LD7535A --- 21.0V ± 1.5V.

Features

z High-Voltage CMOS Process with Excellent ESD

protection

z Very Low Startup Current (<20μA)

z Current Mode Control

z Non-audible-noise Green Mode Control

z UVLO (Under Voltage Lockout)

z LEB (Leading-Edge Blanking) on CS Pin

z Programmable Switching Frequency

z Internal Slope Compensation

z OVP (Over Voltage Protection) on Vcc Pin

z OLP (Over Load Protection)

z 300mA Driving Capability

Applications

z Switching AC/DC Adaptor and Battery Charger

z Open Frame Switching Power Supply

z 384X Replacement

Typical Application

1

Lweawdtwren.Dd aTetcahSnhoeloegty4UCo.rnpeotration www.leadtrend.com.tw

LD7535&LD7535A-DS-01c December 2007

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