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
High-Voltage CMOS Process with Excellent ESD Protection
Very Low Startup Current (Typical 5mA)
l 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 Savingj
Non-audible-noise Green Mode Control
500mA Driving Capability
Switching AC/DC Adaptor and Battery Charger
Open Frame Switching Power Supply
384X Replacement
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