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