Product category: Power Supply ICs and Controllers
News Release from: Intersil | Subject: ISL6721
Edited by the Electronicstalk Editorial Team on 22 October 2003
PWM controller aids PSU customisation
The ISL6721 is a single-ended current-mode PWM controller designed to regulate power in telecomms, datacomms and power over Ethernet systems
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The ISL6721 is a single-ended current-mode PWM controller designed to regulate power in telecomms, datacomms and power over Ethernet (802.3af) systems. It also has numerous applications in industrial power supplies. The ISL6271 is ideal for both 48V datacomms and 36-72V telecomms applications.
It is designed for a wide range of DC/DC power conversion topologies including flyback, forward and boost configurations.
Peak current-mode control effectively handles power transients and provides inherent overcurrent protection.
Other features include a low-power mode wherein the supply current drops to less than 200uA during overvoltage and overcurrent shutdown faults.
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The advanced BiCMOS design features low operating current, adjustable operating frequency up to 1MHz, adjustable soft-start and a bidirectional sync signal that allows the oscillator to be locked to an external clock or other controller ICs for noise-sensitive applications.
Compared with other PWM controllers, the ISL6721 offers higher performance, higher integration and lower overall power solution cost.
"The feature-packed ISL6721 makes it easy for power supply manufacturers to offer both compact and highly customisable power solutions to accommodate the special needs of their end customers", said Randy Roberts, Director of Intersil's Broadband Power Product Line.
"The ISL6721 provides advanced fault protection features that allow OEM system builders to confidently integrate an ISL6721-based power supply directly into a system board knowing that abnormal operating conditions will not cause the power supply to fail".
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