General Description
The LD7578H integrated several functions of protections, and EMI-improved solution in a SOP-8/or DIP-8 package. It minimizes the component counts and the circuit space, and is perfect for the low-cost applications.
It provides functions of low startup current, green-mode power-saving operation, leading-edge blanking of the current sensing and internal slope compensation. Also, the LD7578H features more protections like OLP (Over Load Protection), OVP (Over Voltage Protection), and OTP (Over Temperature Protection) to prevent the circuit being damaged from the abnormal conditions.
Furthermore, the LD7578H features frequency trembling to suppress the noise, providing an excellent solution for EMI filter design.
Features
• High-Voltage (500V) Startup Circuit
• Current Mode Control
• Non-Audible-Noise Green Mode Control
• UVLO (Under Voltage Lockout)
• Leading-Edge Blanking
• Internal Trembling (±4KHz)
• Internal Slope Compensation
• Internal Over Current Protection
• OVP on Vcc/Latch Mode
• OLP /Latch Mode
• External OTP through a NTC
• 500mA Driving Capability
Applications
• Switching AC/DC Adaptor and Battery Charger
• Open Frame Switching Power Supply
Typical Application
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