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LD7552

Leadtrend
Part Number LD7552
Manufacturer Leadtrend
Description Green Mode PWM Controller
Published Jun 8, 2006
Detailed Description www.DataSheet4U.com LD7552 2/21/2005 Green-Mode PWM Controller General Description The LD7552 is a low cost, low start...
Datasheet PDF File LD7552 PDF File

LD7552
LD7552

Overview
www.
DataSheet4U.
com LD7552 2/21/2005 Green-Mode PWM Controller 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.
Patent pending z z z z z z z z z Features z High-Voltage CMOS Process with Excellent ESD Protection Very Low Startup Current (Typical 5µA) 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 Non-audible-noise Green Mode Control 500mA Driving Capability Proprietary Green-Mode Control for Power Saving 1 Applications z z z Switching AC/DC Adaptor and Battery Charger Open Frame Switching Power Supply 384X Replacement 1 Note: Please see Application Information Typical Application AC input EMI Filter VCC 40V 16.
0V/ 11.
4V UVLO OUT RT COMP LD7552 OSC Control Logic photocoupler Divider CS GND TL431 www.
DataSheet4U.
com 1 Leadtrend Technology Corporation LD7552-DS-00 February, 2005 www.
DataSheet4U.
com LD7552 Pin Configuration SOP-8 & DIP-8 (TOP VIEW) VCC OUT NC 5 8 7 CS 6 TOP MARK YYWWPP 1 2 3 4 YY: Year code (D: 2004, E: 2005….
.
) WW: week code PP: production code GND VCC Ordering Information Part number LD7552 IS LD7552 BS LD7552 IN LD7552 BN Package SOP-8 SOP-8 (PB Free) DIP-8 DIP-8 (PB Free) TOP MARK LD7552IS LD7552BS LD7552IN LD7552BN Shipping 2500 /tape & reel 250...


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