LD7791A数据手册Leadtrend中文资料规格书

描述 Description

The LD7791 features transition mode Power Factor correction (PFC) controller and Quasi-Resonant (QR) current mode controller for cost effective and fewer external components design of high power application.The intelligent PFC switching ON/OFF, zero current detection (ZCD) and frequency limitation mechanism enable a better efficiency under any load conditions.The device is also integrated several functions of protection, such as X-CAP discharge, Brown-in/out protection, Over Load protection (OLP), Over Temperature Protection (OTP), Over Voltage Protection (OVP) and Over Current Protection (OCP) with High / Low Line Compensation. Therefore it can protect the system from damage due to occasional failure.The LD7791 is available in a SOP-16 package.

特性 Features

• Integrated PFC and QR Flyback Controller
• Transition Mode PFC Controller
• Quasi-Resonant Operation for Flyback
• Built-in X-CAP Discharging
• Brown IN/OUT Protection
• Internal Soft-Start Function
• Adjustment OLP De-bounce time
• External Latch Protection
• PFC Light Load Turn-off Control
• OVP (Over Voltage Protection)
• OCP (Cycle by cycle current limiting)
• 500mA/-1200mA Driving Capability
• Internal OTP function

应用 Application

• AC-DC High Power Adapter
• Open Frame SMP