General Description

The LD7530/LD7530A are specifically designed for the low total system cost by integrating many functions, protections, and the EMI-improved solution in a tiny SOT-26 package which usually need a lot of extra components or circuits on the general designs.

Furthermore, the LD7530/ 7530A features green mode operation, leading edge blanking time, internal slope compensation and adjustable over load protection (OLP) delay time to minimize the component counts for switching power supply.

And to satisfy different designs, 2 versions of OVP levels are implemented as ---
• LD7530 --- 28.0V ± 1.2V.
• LD 7530A --- 21.0V ± 1.2V

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
• Internal Slope Compensation
• OVP (Over Voltage Protection) on Vcc Pin
• OLP (Over Load Protection)
• 300mA Driving Capability
• Adjustable OLP Delay Time

Applications

• Switching AC/DC Adaptor and Battery Charger
• Open Frame Switching Power Supply