Product category: Discrete Power Devices
News Release from: International Rectifier | Subject: IRL3713 series
Edited by the Electronicstalk Editorial Team on 17 September 2002
Low on-resistance MOSFET
aids convertor efficiency
International Rectifier has introduced the 30V IRL3713 series of HEXFET power MOSFETs available in D2Pak, TO-262 and TO-220 packages
International Rectifier has introduced the 30V IRL3713 series of HEXFET power mosfets available in D2Pak, TO-262 and TO-220 packages. The IRL3713S in a D2Pak, with a maximum on-resistance of 3mohm, has half the on-resistance of the previous generation device in the same footprint and can offer up to 1.5% higher efficiency in an isolated DC/DC convertor.
This article was originally published on Electronicstalk on 17 September 2002 at 8.00am (UK)
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The IRL3713 series devices are optimised for secondary-side synchronous rectification in 48V input isolated DC/DC convertors.
They also improve performance in active ORing circuits in 12V output DC/DC convertors.
Additionally, they can be used as synchronous FETs in synchronous buck convertors.
Typical applications include powering application specific ICs and microprocessors in networking and communication equipment, desktops and servers.
The new devices have low on-resistance for low conduction loss as well as low gate charge to minimise switching loss.
Low gate charge also simplifies drive circuitry.
These improvements in silicon performance are available in the same package footprint enabling an increase in convertor power density.
When tested in the secondary side of a 48V input, 3.3V output isolated DC/DC convertor operating at 200kHz, the IRL3713 offers up to 1.5% efficiency improvement over the previous generation IR device at 60A full load.
In active ORing power supply redundancy circuits, mosfets replace Schottky diodes to achieve higher efficiency.
The IRL3713 series devices are for ideal active ORing applications, as the low on-resistance ensures minimal forward voltage drop in the on state, for maximum efficiency.
When a Schottky diode is used in the ORing circuit, the typical 40A device has a forward voltage drop of about 0.4 to 0.5V at 100C, whereas the IRL3713 has a forward voltage drop of 0.18V at 100C and 40A.
This is an improvement of over 50%, which contributes to increased efficiency.
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