Product category:
Power Supply ICs and Controllers
News Release from: International Rectifier | Subject: IRS254x series
Edited by the Electronicstalk Editorial
Team on 12 October 2006
Buck controller is made for lighting
High-voltage high-frequency buck controller targets applications requiring multiple LED circuits or requiring DC/DC colour-mixing capabilities.
A high-voltage, high-frequency buck regulator control IC for AC/DC offline, nonisolated applications requiring multiple light-emitting diode (LED) circuits or requiring DC/DC colour-mixing capabilities has been introduced by International Rectifier Applications include indoor and outdoor signage as well as architectural, entertainment, design and decorative lighting
This article was originally published on Electronicstalk on 15 Feb 2001 at 8.00am (UK)
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Rated at 200 or 600V, the IRS254x series incorporates a continuous mode, time-delayed hysteretic buck regulator to control the average load current within a tolerance of 5%, using an accurate on-chip band gap voltage reference.
An external high-side bootstrap circuit drives the buck switching element at high frequencies up to 500kHz.
A low-side driver is also provided for synchronous rectifier designs.
The new ICs deliver a micropower startup of less than 500uA for extremely low losses at turn-on and a deadtime of 140ns for continuous current regulation.
Other features include auto restart, nonlatched shutdown and PWM dimmable capability, incorporated into a compact 8-pin DIP or 8-pin SOIC package, also available in tape and reel.
These ICs use IR's advanced high-voltage IC process which incorporates latest-generation high-voltage level-shifting and termination technology to deliver superior electrical over-stress protection and higher field reliability, in addition to other new features and enhancements.
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