PWM controllers aim for distributed bricks

Edited by the Electronicstalk editorial team Dec 17, 2003

The Endura ISL6740 and ISL6741 are double-ended PWM controllers designed to improve performance while reducing system costs for telecomms and datacomms power supplies.

The Endura ISL6740 and ISL6741 are double-ended PWM controllers designed to improve performance while reducing system costs for telecomms and datacomms power supplies.

These advanced ICs are the most highly integrated push-pull and bridge PWM controllers available.

Along with greatly reduced bill of materials (BOM) costs, the high-speed operation and advanced feature set of these ICs make them the next step and preferred choice for power supply manufacturers as system builders demand higher power density and smaller power modules.

"The ISL6740 and ISL6741, with their high-speed operation and advanced feature set, are designed to control Intersil's HIP2101 half-bridge mosfet driver to complete an efficient and robust power solution", said Jeff Strang, Intersil's Isolated Power Marketing Manager.

"This chipset combination establishes a new performance standard for telecomms and datacomms power management".

Telecomms and datacomms systems, such as Internet routers, switches, and central office DSL systems, require efficient conversion of 48V buses to low voltages to power digital ICs such as network processors, ASICs, CPUs, and FPGAs.

The ISL6740 and ISL6741 are designed for medium- to high-power (above 50W) telecomms DC/DC conversion applications such as the popular "eighth brick" and "quarter brick" power modules that are used throughout communications infrastructure equipment.

The ISL6740 is a voltage-mode PWM controller for use in isolated half-bridge and open loop "bus convertor" applications.

The ISL6741 is pin-compatible with the ISL6740 and supports peak-current-mode control for isolated push-pull and hard-switched full-bridge power supplies.