Functional safety gate driver spans 24 to 60V for motors in vehicles

“The gate driver IC offers functional safety according to ISO 26262 ASIL B,” according to Infineon. “It has a range of protection functions such as timeout-watchdog, drain-source monitoring, over-voltage, under-voltage, cross-current and over-temperature protection, as well as off-state diagnostics.”

Called TLE9140, it can operate with supplies across 8V to 60V, or up to 75V with reduced performance for load dumps (90V abs max). External reverse polarity protection components are required.

Gates up to around 230nC per mosfet up to 20kHz can be driven, said Infineon, with “adaptive control that can compensate for fluctuations in the mosfet parameters in the system. It automatically adjusts gate current to achieve the desired switching behavior. This allows the system to be optimised in terms of electromagnetic emissions by slower slew rates, while minimising power dissipation through shorter dead times and shorter rise/fall times”.

The company suggests pairing the driver with one of its TLE987x microcontrollers – an evaluation board board (TLE9140EQW EVAL) that includes a Cortex-M3 based TLE9879, and has links on board to allow other MCUs to be connected. You will have to give your contact information away to get detailed information on this board.

Packaging is 6 x 9mm TS-DSO-32 with a thermal pad to dump heat into the PCB.

Applications are foreseen with pumps, fans and windscreen wipers in vehicles, as well as in e-scooters and e-bikes.

and a configuration wizard for generating control frames for the external bridge driver via SPI.

Find the TLE9140 product web page here