PWM Control ICs work with synchronous buck DC/DC converters.
July 27, 2007 -
Used in networking, computing, and communications systems, IR3622MPbF and IR3622AMPbF are dual-channel synchronous buck control ICs intended for use as integrated drivers for medium- to high-current point-of-load buck converters. Products can be configured to single output in current share mode, capable of delivering up to 80 A or 2 independent outputs that run 180° out of phase. While IR3622MPbF targets 12 V single-input applications, IR3622AMPbF supports 5 and 12 V applications.
(Archive News Story - Products mentioned in this Archive News Story may or may not be available from the manufacturer.)
IR Introduces Two Configurable Dual Phase PWM Control ICs for High Performance Synchronous Buck DC-DC Converters
EL SEGUNDO, Calif. - International Rectifier, IR® (NYSE: IRF), a world leader in power management technology, today introduced two dual channel synchronous buck control ICs with integrated high performance drivers for medium- to high-current point-of-load (POL) buck converters 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 80 amperes, or to support two independent outputs. 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.
"These flexible and feature-rich ICs provide greater protection and configurability to meet the design demands of today's high performance systems," said Rami Hamze, senior marketing manager for IR's DC-DC Standard Products.
The IR3622MPbF targets 12V single input applications while the IR3622AMPbF can support 5V and 12V applications. Key protection features include selectable hiccup or latched current limit, pre-bias start-up, thermal shutdown protection, and under- and over-voltage protection.
The devices feature a programmable switching frequency up to 600 kHz to reduce input and output filtering requirements, and minimizing 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 start-up.
The IR3622 family is well suited to multi-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 converters.
Data sheets for the devices are available on the website at http://www.irf.com/whats-new/nr070712.html. Also, two reference designs are available: the IRDC3622S for single output (dual phase) and the IRDC3622D for dual output.
Availability and Pricing
The IR3622MPbF, IR3622MTRPbF, IR3622AMPbF and IR3622AMTRPbF devices are available in 10,000-unit quantities at $1.90 USD each. Production orders are available immediately. Prices are subject to change.
About International Rectifier
International Rectifier (NYSE:IRF) is a world leader in power management technology. IR's analog and mixed signal ICs, advanced circuit devices, integrated power systems and components enable high performance computing and reduce energy waste from motors, the world's single largest consumer of electricity. Leading manufacturers of computers, energy efficient appliances, lighting, automobiles, satellites, aircraft and defense systems rely on IR's power management benchmarks to power their next generation products. For more information, go to www.irf.com.
Trademark Notice
IR® is a registered trademark of International Rectifier Corporation. All other product names noted herein may be trademarks of their respective holders. Company Information: Name: International Rectifier Corp. Address: 233 Kansas St. City: El Segundo State: CA ZIP: 90245 Country: USA Phone: 800-981-8699 FAX: 310-322-3332 http://www.irf.com
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