Description

The SC4809A/B/C is a 10 pin BICMOS primary side current mode 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.

Features

◆ Operation to 1MHz

◆ Accurate programmable maximum duty cycle

◆ Line voltage monitoring

◆ External frequency synchronization

◆ Bi-phase mode of operation for low ripple

◆ Under 100µA start-up current

◆ Accessible reference voltage

◆ VDD undervoltage lockout

◆ -40°C to 105°C operating temperature

◆ 10 lead MSOP package. Lead free package available. Fully WEEE and RoHS compliant

Applications

◆ Telecom equipment and power supplies

◆ Networking power supplies

◆ Power over LAN applications

◆ Industrial power supplies

◆ Isolated power supplies