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Low Power-Loss MOSFETs for Servers and Telecom

Onsemi has announced its new 600 V SUPERFET V family of MOSFETs. The high-performance devices enable power supplies to meet demanding efficiency regulations such as 80 PLUS Titanium, especially at the highly challenging 10% load condition, says the company. As part of the 600 V SUPERFET family, three product groups—FAST, Easy Drive and FRET—are optimized to deliver class-leading performance in a variety of applications and topologies.

The 600 V SUPERFET V family offers excellent switching characteristics and lower gate noise resulting in enhanced electromagnetic interference (EMI) performance – a significant benefit for server and telecom systems. Additionally, system reliability is enhanced by a robust body diode and elevated VGSS (DC plus−minus 30V).

The FAST versions offer the ultimate efficiency in hard switching topologies (such as high-end PFC) and are optimized to deliver reduced gate charge (Qg) and EOSS losses to enable fast switching. The initial devices include the NTNL041N60S5H (41milliohm RDS(on)) and NTHL185N60S5H (185 milliohm RDS(on)), which are both in a TO-247 package. The NTP185N60S5H is in a TO-220 package and the NTMT185N60S5H is in an 8.0mm x 8.0mm x 1.0mm Power88 package that guarantees MSL 1 and has a Kelvin source configuration to improve gate noise and switching power loss.

The Easy Drive versions are suited to both hard and soft switching topologies and contain an internal gate resistor (Rg) as well as optimized internal capacitance. They are fit to general purpose use in many applications including PFC and LLC. In these devices, the built-in Zener diode between gate and source electrode for over 120 milliohm RDS(on) gives less stress on the gate oxide and higher ESD ruggedness leading to better assembly yield and reduced field failures. Two devices are currently available with 99 milliohm and 120 milliohm RDS(on)—the NTHL099N60S5 and NTHL120N60S5Z are both supplied in a TO-247 package.

The fast recovery (FRFET) versions are suited to soft switching topologies such as phase-shifted full bridge (PSFB) and LLC. They benefit from a fast body diode and offer reduced Qrr and Trr. The robust diode ruggedness ensures enhanced system reliability. The NTP125N60S5FZ with built-in Zener diode offers 125 milliohm RDS(on) in a TO-220 package while the NTMT061N60S5F offers 61milliohm in a Power88 package. The lowest loss device is the NTHL019N60S5F which has the RDS(on) of just 19 milliohm in a TO-247 package.

Onsemi | www.onsemi.com

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Low Power-Loss MOSFETs for Servers and Telecom

by Circuit Cellar Staff time to read: 2 min