L99H92 datasheet(2/77 Pages) STMICROELECTRONICS

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Electric park brake system

Description

The L99H92 is designed to drive 4 external N-channel MOSFET transistors in single H-bridge or dual

independent half bridge configuration for DC-motor control in automotive applications. Two free configurable

current sense amplifiers are integrated.

The device has a low power mode (standby mode) where the current consumption is less than 5 µA.

Programmable gate driving current allows minimizing EMI. Each gate driver monitors independently its external

MOSFET drain-source voltage for fault conditions.

Programmable cross current protection time avoids concurrency of high side and low side activation for each half

bridge.

Two off-state diagnostic comparators detect potential short to ground, short to battery or open load conditions.

The integrated standard serial peripheral interface (SPI) controls the device and provides diagnostic information.

An additional DIAGN output pin alerts the microcontrollers of a fault occurred into the device faster than the SPI

communication.

The L99H92 device implements diagnostic and protection features such as supply voltage monitoring, charge

pump voltage monitoring, overcurrent protection, temperature warning and overtemperature shutdown.

The devices are hosted in a TQFP32 and a QFN32 package both with exposed pad. QFN32 has wettable flanks

for easy visual inspection of the solder joint.

L99H92

DS14069 - Rev 4

page 2/77

L99H92 Scheda tecnica(PDF) 2 Page - STMicroelectronics