Product category:
Power Supply ICs and Controllers
News Release from: International Rectifier | Subject: IR3622MPbF and IR3622AMPbF
Edited by the Electronicstalk Editorial
Team on 30 July 2007
Controllers ease POL convertor design
Dual-channel synchronous buck control ICs integrate high performance drivers for medium- to high-current point-of-load buck convertors.
International Rectifier has developed a pair of dual-channel synchronous buck control ICs with integrated high performance drivers for medium- to high-current point-of-load (POL) buck convertors used in networking, computing and communications systems The IR3622MPbF and IR3622AMPbF can be configured to support a single output in current share mode, capable of delivering up to 80A, or to support two independent outputs
This article was originally published on Electronicstalk on 15 Feb 2001 at 8.00am (UK)
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The independent channels run 180 degrees out of phase, and reduce the required input capacitance requirement.
A significant reduction in output ripple voltage is achieved in single output mode.
The IR3622MPbF targets 12V single input applications, whereas the IR3622AMPbF can support 5 and 12V applications.
Key protection features include selectable hiccup or latched current limit, prebias startup, thermal shutdown protection, and under- and overvoltage protection.
The devices feature a programmable switching frequency up to 600kHz to reduce input and output filtering requirements, and minimising the size and number of external filter capacitors and inductors needed.
Available in a 32-lead MLPQ package, the new ICs also feature two independently programmable soft-start functions to allow system level sequencing of output voltages in various configurations critical for system level startup.
The IR3622 family is well suited to multiple-rail applications that require sophisticated power-up and power-down tracking and sequencing of multiple rails by offering a combination of track, sequencing, enable, and "power good" output features that can be used to trigger a sequential rise of output voltages across multiple POL convertors.
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