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LD7550IL, LD7552, LD7552BGS

Table of contents:
Info of LD7550IL
Info of LD7552
Info of LD7552BGS

LD7550IL, LD7552, LD7552BGS Selling Leads, Datasheet

MFG:LEADTREND Package Cooled:SOT-23-6 D/C:08+

LD7550IL, LD7552, LD7552BGS Datasheet download

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Part Number: LD7550IL

MFG: LEADTREND

Package Cooled: SOT-23-6

D/C: 08+

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LD7552 General Description

The LD7552 is a low cost, low startup current, current mode PWM controller with green-mode power-saving operation. The integrated functions such as the leading-edge blanking of the current sensing, internal slope compensation and the small package provide the users a high efficiency, minimum external component counts, and low cost solution for AC/DC power applications.

The special green-mode control does not only achieve low power consumption but also offer a non-audible-noise operation when the LD7552 operates under light load or no load condition.

The LD7552 is designed for the switching adaptor with 30W~60W output. The LD7552 is offered in both SOP-8 and DIP-8 package.

LD7552 Maximum Ratings

Supply Voltage V_CC ........................36V
COMP, RT, CS ....................... -0.3 ~7V
Operating Junction Temperature ................ 150
Storage Temperature Range............. -65 to 150
Package thermal resistance (DIP-8) ............. 100 /W
Package thermal resistance (SOP-8) .............160 /W
Lead temperature (LD7552IS & LD7552IN, Soldering, 10sec).. 230
Lead temperature (LD7552BS & LD7552BN, Soldering, 10sec) . 260

LD7552 Features

·High-Voltage CMOS Process with Excellent ESD Protection
·Very Low Startup Current (Typical 5 A)
·Under Voltage Lockout (UVLO)
·Current Mode Control with Cycle-by-Cycle Peak Current Limiting
·Leading-Edge Blanking on CS Pin
·Programmable Switching Frequency
·Internal Slope Compensation
·Proprietary Green-Mode Control for Power Saving
·Non-audible-noise Green Mode Control
·500mA Driving Capability

LD7552 Typical Application

·Switching AC/DC Adaptor and Battery Charger
·Open Frame Switching Power Supply
·384X Replacement

LD7552 Connection Diagram

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