[Leadtrend Technology Corporation]

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. 

FEATUREs
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
Proprietary Green-Mode Control for Power Saving
Non-audible-noise Green Mode Control
500mA Driving Capability