Brand:力林(Power Forest )

Model:NE1109 NE1109 datasheet Rev 00.rar

The NE1109 is a green mode PWM controller, it is built-in with several features to enhance the performance of off-line power supply in SO-8 package. The NE1109 is automatically to optima the efficiency during light load and quarter of output loading. Under no load condition, the controller enters skip mode and limits the peak current to avoid audible noise. The NE1109 is designed for high performance SMPS and integrates a jittering function that helps reduce EMI emission of a power supply with minimum EMI filters. The OPP and Brown in/out are integrated and flexible to be adjustable.

 Features:

• Adjustable Over Power Protection Function
• Brown in and Brown out Function
• Minimum Frequency Limit to avoid Audible Noise
• Latched Primary OTP & OVP
• Operation Frequency Down to 26KHz in Light Load and Skipped Cycle in No Load Condition
• Auto Recovery System Open Loop Protection
• Auto Recovery System Output Short Circuit Protection
• Internal 4mS Soft Start Time Period
• Internal 300nS Leading Edge Blanking+300mA/-500mA Gate Drive Capability
• Frequency Jittering for EMI Reduction
• Current Mode Control with Internal Slope Compensation
• Cycle-by-Cycle Maximum Current Limit Protection