40V automotive MOSFETs for motor control

March 11, 2016 // By Graham Prophet
Rated for operation up to +175°C, the 40V DMTH4004SPSQ and DMTH4005SPSQ automotive-compliant MOSFETs introduced by Diodes Inc. are suited for use in high ambient temperature environments. The DMTH4004SPSQ has been designed to meet the requirements of high-power (>750W) brushless DC motor (BLDC) applications, such as water and fuel pumps, while the DMTH4005SPSQ is suited to lower power BLDC applications, such as auxiliary pumps and heating, ventilation and air-conditioning (HVAC) systems.

Developed for use with three-phase BLDC motor control applications, the DMTH4004SPSQ and DMTH4005SPSQ are 100% avalanche tested, ensuring a robust design that is able to withstand the high pulses of reverse avalanche energy that can occur with inductive loads. At a gate-source voltage of 10V, the DMTH4004SPSQ and DMTH4005SPSQ feature maximum on-resistances of 2.7 mΩ and 4 mΩ respectively, which together with their low gate charge ensures that power losses are kept to a minimum.


In the low thermal resistance POWERDI5060-8 package, that allows for a maximum junction temperature of 175°C the FETs are priced respectively $0.50 and $0.64 (3000).


Diodes; www.diodes.com