High Speed Isolated Mosfet Gate Driver

For more information see the overview for mosfet and igbt gate drivers product page.

High speed isolated mosfet gate driver.

The ucc2752x family of devices are dual channel high speed low side gate driver devices capable of effectively driving mosfet and igbt power switches. Our isolated gate drivers are available in basic functional and reinforced isolation and accept a low power input from a controller ic to produce the appropriate high current gate drive for a mosfet igbt sic or gan power switch. Galvanic isolation is attained using a high voltage on chip micro transformer that ensures commands and diagnostic information are reliably transferred to and from the floating with respect to ground section of the circuit. 9789075815153 p 1 for circuits in the second group the change in drain source voltage of one device triggers the gate of the device above it and thus the devices switch sequentially 1 8 9.

Safe switching of high speed silicon carbide sic and gallium nitride gan transistors places an extra requirement on isolated gate driver ics. The tps28xx single channel high speed mosfet drivers are capable of delivering peak currents of up to 2 a into highly capacitive loads. Procedure for ground referenced and high side gate drive circuits ac coupled and transformer isolated solutions are described in great details. High common mode transient immunity cmti.

Robust strong and precise single and dual channel isolated gate driver ics for mosfets igbts igbt modules sic mosfets and gan hemts eicedriver galvanically isolated gate drivers use the magnetically coupled coreless transformer ct technology to provide signal transfer across the galvanic isolation. Using a design that inherently minimizes shoot through current ucc2752x can deliver high peak current pulses of up to 5 a source and 5 a sink into capacitive loads along with rail to rail drive capability and extremely small propagation delay typically 13 ns. As seen in figure 3 transition time reduces significantly with an adum4121 isolated gate driver which provides much higher drive current than a microcontroller i o pin drives the same power mosfet. In many cases driving a larger power mosfet igbt directly with a microcontroller might overheat and damage the control due to a possible current.

A magnetically isolated gate driver for high speed voltage sharing in series connected mosfets anthony philip epe 2011 birmingham isbn. St offers the stgap series of isolated mosfet and igbt gate drivers that provide galvanic isolation between the input section which connects to the control part of the system and the mosfet or igbt being driven. The integrated high speed isolated gate driver. High switching speeds t r and t f 14 ns typ are obtained with the use of bicmos outputs.

A special section deals with the gate drive requirements of the mosfets in synchronous rectifier applications.