Product category:
Power Supply ICs and Controllers
News Release from: International Rectifier | Subject: IR3651
Edited by the Electronicstalk Editorial
Team on 21 February 2007
PWM controller includes 150V half-bridge
driver
Synchronous PWM control IC is designed for high performance synchronous DC/DC buck applications with an input voltage range up to 75V.
New from International Rectifier, the IR3651 is a synchronous PWM control IC designed for high performance synchronous DC/DC buck applications with an input voltage range up to 75V With programmable switching frequency up to 400kHz, the IR3651 is ideal for a wide range of applications including telecomms and basestation power supplies, networking servers, automotive and industrial control
This article was originally published on Electronicstalk on 15 Feb 2001 at 8.00am (UK)
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The IR3651, with a pair of IR's DirectFET MOSFETs, can achieve greater than 88% system efficiency at 48V input and 3.3V output at 6A without a heatsink or airflow.
compared with similar devices on the market, this new control IC offers a higher maximum input voltage rating, which enables a more robust and reliable design.
The IR3651 is designed to drive a pair of external N-channel MOSFETs up to 25A.
Protection features such as programmable soft-start, hiccup current limit and under-voltage lockout are provided for required system-level reliability in the event of a fault condition.
The device also offers synchronisation which allows simplified system-level EMI filter design.
The new controller includes a 150V half-bridge driver that allows for considerable design flexibility.
For instance, the device may be used in low power (less than 60W) nonisolated DC/DC convertors for network equipment as well as high power (greater than 200W) preregulator stages in regulated isolated convertors.
As a result, the IR3651 can be applied to designs for 36V inkjet printers, 28V aerospace applications, 24V electric bicycles, 72V battery systems, 18V wall bricks, 12V secondary-side post regulators and general purpose high-voltage, nonisolated DC/DC convertors.
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