L99MH94Q7-TR Quad half-bridge pre-driver

The L99MH94 and L99MH92 integrate respectively a quad and a dual half-bridge pre-driver dedicated to control up to eight and four N-channel MOSFETs.

It is intended for DC motor control applications such as automotive power seat control or other applications.

A 24-bit serial peripheral interface (SPI) is used for configuring and controlling the eight half-bridges or four H‑bridge. SPI status registers provide high-level diagnostic information such as supply voltage monitoring, the charge pump voltage monitoring, temperature warning and overtemperature shutdown.

Each gate driver monitors independently its external MOSFET drain-source voltage for fault conditions.

The L99MH94 / L99MH92 support indirect current measurement on external MOSFETs, allowing cost saving and lower system complexity, avoiding the usage of shunt resistors.

A more efficient gate current control of the external MOSFETs, called “three stages gate current”, decreases and optimizes electromagnetic interference (EMI).

Protection features (drain-source monitoring for short circuit detection, overtemperature warning and shutdown, timeout watchdog for MCU control, detailed off-state diagnostic via SPI) ensure the ASIL-B achievement according to ISO 26262 standard.

The L99MH94 is housed in VFQFN48L and VFQFN32L packages with an exposed pad, the L99MH92 is housed in a VFQFN32L package with exposed pad. These packages have wettable flanks for easy visual inspection of the solder joint.