STMicroelectronics’ octal automotive gate driver
Summary
The L99MH98 can also drive resistive loads such as heaters, and the internal circuitry contains a charge pump whose output can control a reverse-battery protection MOSFET. Designed to provide each MOSFET’s drain-source voltage (VDS) to an analog-digital converter (ADC), the L99MH98 leverages indirect current measurement to replace sensing resistors. This ST-patented technique calculates the drain current in each MOSFET by combining the measured VDS with RDS(on) predicted using sensed temperature. The system is calibrated at manufacture to find the nominal RDS(on) values, enabling predictions to be made using the MOSFETs’ resistance-versus-temperature curves. Available now in a VFQFN48L package with wettable flanks and exposed underside cooling pad, the L99MH98 is priced from $2.44 for orders of 1000 pieces.
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