Description

The SC4810B/E is a 16 pin BICMOS primary side PWM controller for use in Isolated DC-DC and off-line switching power supplies. It is a highly integrated solution, requiring few external components. It features a high frequency of operation, accurately programmable maximum duty cycle, current mode control, line voltage monitoring, supply UVLO, low start-up current, and programmable soft start with user accessible reference. It operates in a fixed frequency, highly desirable for Telecom applications.

Features

◆ Operation to 1MHz

◆ Accurate programmable maximum duty cycle

◆ Line voltage monitoring

◆ External frequency synchronization

◆ Bi-phase mode of operation for low ripple

◆ Independent programmable delays

◆ Hiccup mode current limit

◆ Under 250µA start-up current

◆ Programmable maximum volt-second clamp

◆ Accessible reference voltage

◆ VDD undervoltage lockout

◆ -40°C to 105°C operating temperature

◆ 16 lead TSSOP or MLPQ lead free packages. Both fully WEEE and RoHS compliant

Applications

◆ Telecom equipment and power supplies

◆ Networking power supplies

◆ Power over LAN applications

◆ Industrial power supplies

◆ Isolated power supplies

◆ VoIP phones