General Description
The LD7578 integrates several functions of protections in a SOP-8 package. It minimizes the component counts and the circuit space.
The device provides functions of low startup current, green-mode power-saving operation, leading-edge blanking of the current sensing and internal slope compensation. Also, the LD7578 features more protections like OLP (Over Load Protection), OVP (Over Voltage Protection), and external OTP (Over Temperature Protection) to prevent the circuit from being damaged under abnormal conditions.
Features
• High-Voltage (500V) Startup Circuit
• 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
• OLP (Over Load Protection)
• OTP through a NTC/Latch-Off Mode
• 500mA Driving Capability
Applications
• Switching AC/DC Adaptor and Battery Charger
• Open Frame Switching Power Supply
• LCD Monitor/TV Power
Typical Application
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