Leadtrend LD7552
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.| Part No. | LD7552 |
|---|---|
| Datasheet | LD7552 Download |
| Manufacturer |  Leadtrend |
| Description | Green Mode PWM Controller |
| Buy | Stock & Price |
GENERAL DESCRIPTION
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 zFEATURES
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 1APPLICATIONS
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...
