General Description
The LD7552D are specifically designed for the low total system cost by integrating many functions, protections, and the EMI-improved solution in a SOP-8 package which usually need a lot of extra components or circuits on the general designs.
The implemented functions include low startup current, green-mode power-saving operation, leading-edge blanking of the current sensing and internal slope compensation. And the LD7552D features more protections like OLP (Over Load Protection) and OVP (Over Voltage Protection) to prevent the circuit damage from the abnormal conditions.
Features
• High-Voltage CMOS Process with Excellent ESD protection
• Very Low Startup Current (< 20uA)
• Current Mode Control
• Non-audible-noise Green Mode Control
• UVLO (Under Voltage Lockout)
• LEB (Leading-Edge Blanking) on CS Pin
• Adjustable OLP Delay Time.
• Internal Slope Compensation
• OVP (Over Voltage Protection) on Vcc Pin
• OLP (Over Load Protection)
• 500mA Driving Capability
Applications
• Switching AC/DC Adaptor and Battery Charger
• Open Frame Switching Power Supply
Typical Application
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