LD7552 – Green Mode PWM Controller

LD7552 Datasheet PDF learn more.

Part number : LD7552

Functions : This is a kind of semiconductor, Green Mode PWM Controller.

Pin arrangement :

Package information :

Manufacturer : Leadtrend

Image :

LD7552 Datasheet PDF

The texts in the PDF file :

LD7552 2/21/2005 Green-Mode PWM Controller General


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


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 1 Leadtrend Technology Corporation LD7552-DS-00 February, 2005 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 [ … ]

LD7552 PDF File

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