Apraksts

• General Description
• The LD7752 brings high performance, highly integrated
• functions, protections and EMI-improve solution. It’s an
• ideal solution for those cost-sensitive system, reducing
• component count and overall system cost.
• The LD7752 features high voltage startup circuit,
• minimum loss and green-mode power-saving operation,
• leading-edge blanking of the current sensing and internal
• slope compensation. They also consist of more
• protections of OLP (Over Load Protection) and OVP (Over
• Voltage Protection) to prevent the circuit from damage
• under abnormal conditions.
• Furthermore, the proprietary frequency swapping function
• can reduce the noise and help the power circuit designers
• to enhance EMI performance with fewer components and
• less developing time.
• Features
•  High-Voltage Startup Circuit
•  UVLO (Under Voltage Lockout)
•  LEB (Leading-Edge Blanking) on CS Pin
•  Internal Frequency swapping
•  Internal Slope Compensation
•  Internal OCP Compensation
•  OVP (Over Voltage Protection) on Vcc Pin
•  OLP (Over Load Protection)
•  +250mA/-500mA Driving Capability
•  Soft-Driving
•  Soft Start Time and Grouping Frequency Adjustment
• Applications
•  LCD Monitor/TV Power
•  Switching AC/DC Adaptor and Battery Charger
•  Open Frame Switching Power Supply

Parametri

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