LD7539E数据手册Leadtrend中文资料规格书

描述 Description

Green-Mode PWM Controller Integrated with Brown Out and OTP Protections The LD7539E is built-in with several functions, protection and EMI-improved solution in a tiny package. It takes less components counts or circuit space, especially ideal for those total solutions of low cost. 

The implemented functions include low startup current, green-mode power-saving operation, leading-edge blanking of the current sensing and internal slope compensation.  It also features more protections like BNO (Brownout), OTP (Over Temperature Protection), OLP (Over Load Protection) and OVP (Over Voltage Protection) to prevent circuit damage occurred under abnormal conditions. 

Furthermore, the Frequency Swapping function is to reduce the noise level and thus helps the power circuit designers to easily deal with the EMI filter design by spending minimum amount of component cost and developing time.

特性 Features

• High-Voltage CMOS Process with Excellent ESD protection
• Very Low Startup Current (<14μA)
• Green Mode Control
• UVLO (Under Voltage Lockout) 
• LEB (Leading-Edge Blanking) on CS Pin 
• Internal Frequency Swapping 
• Internal Slope Compensation
• AC Input BNO (Brownout) Protection
• OVP (Over Voltage Protection) on VCC Pin
• Adjustable OVP (Over Voltage Protection) on CS Pin
• Adjustable OCP (Over Current Protection) on CS Pin
• OTP (Over Temperature Protection) through a NTC
• OLP (Over Load Protection)
• 250mA/-600mA Driving Capability

应用 Application

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