Product category:
Power Supply ICs and Controllers
News Release from: International Rectifier | Subject: IR1166
Edited by the Electronicstalk Editorial
Team on 31 October 2006
Rectifier enables smaller cooler
supplies
Smart rectifier IC uses a new technique for precise, direct sensing of voltage thresholds across the SR MOSFETs, allowing fast, accurate control to minimise power losses.
The IR1166 SmartRectifier from International Rectifier is an eight-pin IC that simplifies the design of mid-power secondary synchronous rectification (SR) circuits of resonant half-bridge convertors and flyback convertors designed for 50-150W discontinuous conduction mode (DCM), critical conduction mode (CrCM), and continuous conduction mode (CCM) Enabling smaller and cooler supplies the IR1166 is used for AC/DC power convertors in laptops, mini-PCs, LCD and PDP televisions, game systems, home theatre audio, motor drive, and other digital computing and home entertainment systems
This article was originally published on Electronicstalk on 15 Feb 2001 at 8.00am (UK)
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International Rectifier has introduced the world's first 1000V radiation-hardened power MOSFET.
MOSFETs improve 12V-input converter efficiency
Two new 20V HEXFET power MOSFET families from International Rectifier are designed to increase efficiency by up to 4% in 12V-input DC/DC convertors.
IR's new SmartRectifier IC uses a new technique for precise, direct sensing of voltage thresholds across the SR MOSFETs, allowing fast, accurate control to minimise power losses in mid-power flyback circuits.
In contrast, traditional complex and bulky current transformer control circuits waste energy because of the large reversing currents required to sense polarity shifts through the SR MOSFETs.
compared with discrete solutions, IR1166S increases overall system efficiency by 1% while using 75% fewer components, and allowing a 25% reduction in SR system cost.
Further reading
MOSFETs improve power density on both sides
New from International Rectifier are two TO-220-packaged HEXFET power MOSFETs that maximise power density and performance in primary- and secondary-side DC/DC convertor circuits.
Rad-hard MOSFETs protect and survive
With high radiation hardness and unparalleled single event effect (SEE) immunity, International Rectifier's new R5 MOSFETs are well suited for systems that must survive penetrating gamma rays.
The IR1166 SmartRectifier IC works independently from the primary control and enables synchronous rectification so it can be used in a variety of transformer switching modes and applications with capacitive output filters.
Furthermore, when "burst mode" occurs on the primary side, the secondary side remains unaffected, complying with California Energy Commission (CEC) 80Plus and 1W Standby.
This new device, based on IR's proprietary high voltage IC (HVIC) technology, is compatible with all MOSFET gate types, and offers a direct connection to a wide range of 40 to 200V SR MOSFETs.
When used with IR's standard and logic-level HEXFET power MOSFETs, the new IC reduces losses dissipated in the SR MOSFET by 50%, reducing the number of MOSFETs needed in the circuit or enabling the use of smaller packages, such as surface mount SO-8 parts.
These optimised MOSFETs work with the IR1166 to create a "total chipset solution" to further maximise efficiency and power density in SR circuits.
In addition to the SmartRectifier IC, there will be an IRAC1166-100W flyback convertor reference design available that operates in CrCM.
This reference design demonstrates the SmartRectifier features by resolving the output rectification function using a combination of one IR1166SPbF IC and two IRF7853 (SR) MOSFETs in parallel.
The entire solution uses only three SO-8 packages for low-side output rectification and requires no heatsink.
The new IC is available immediately in an SO-8 package and soon in DIP-8 package, which are both lead-free (PbF) and compliant with the Restriction of Hazardous Substances Directive (RoHS).
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