LD5761B中文资料AC-DC控制器 : 隔离式高压启动控制/驱动器数据手册Leadtrend规格书

描述 Description

The LD5761B is a Green Mode PWM IC which is built-in with brown-in/out functions in a SOP-7/SOP-8 package. The device could minimize the component counts, circuit space, and reduces the overall material cost of power applications. 

The two-level frequency of operation enables excellent performance and high efficiency at nominal line. While in low line, just operate in high-level frequency to reduce BMAX.  Without changing transformer design, the energy loss is perfectly minimized. 

With complete protections in it, like OLP (Over Load Protection), OVP (Over Voltage Protection), fast OSCP (Output short circuit protection) and brown-in/out protection, the LD5761B protects the circuit from being damaged in abnormal conditions. 

Furthermore, the LD5761B features frequency swapping and soft driving function to minimize the noise and enhance EMI.

 

特性 Features

• High-Voltage (650V) Start-up Circuit
• No-Load Power Consumption<30mW@230Vac with X-cap discharge
• Two-Level Frequency Operation at H/L Line
• Built- in Brown-in/out Function on HV pin
• Built- in X-Cap Discharge on HV pin
• Frequency Swapping for EMI Enhancement
• Non-Audible-Noise Green Mode Control
• LEB (Leading-Edge Blanking) on CS Pin 
• Internal Slope Compensation
• OVP (Over Voltage Protection) on VCC
•  OLP (Over Load Protection)
• OTP (Over Temperature Protection)
• OSCP(Output Short Circuit Protection) 
• Soft Driving
• +300mA/-800mA Driving Capability

应用 Application

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