L9945 datasheet(2/151 Pages) STMICROELECTRONICS

Nome de Peças	L9945

Descrição Electrónicos	Automotive fully configurable 8-channel High/Low side MOSFET pre-driver suitable for 12 V and 24 V systems

PDF	151 Pages

Scroll/Zoom	100%

Fabricante Electrônico	STMICROELECTRONICS [STMicroelectronics]

Página de início	http://www.st.com

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2 / 151 page

Description

The L9945 is an 8-channel MOSFET pre-driver configurable for low-side, high-side,

peak and hold and H-Bridge load control. It is designed to comply with the

requirements of 12 V (passenger vehicle) and 24 V (commercial vehicle) battery

systems.

All outputs can be PWM controlled. Six outputs are capable of driving safety relevant

loads. One output can be dedicated to the actuation of safety relevant loads requiring

a dedicated enable pin (EN6).

The device offers the possibility of controlling two independent H-Bridges.

The device can also drive up to two loads requiring "peak & hold" control strategy.

The driver outputs are protected against short circuit condition.

The device protects the external MOS in case of an overcurrent event.

Each output provides full diagnostic information such as short to battery, short to

ground and open-load. Each output status can be constantly monitored through

dedicated SPI registers.

The voltage slew rate of the external transistors 1-8 is controlled during turn ON and

turn OFF in order to improve EMI behavior.

A double, redundant, external disable source is available through DIS and NDIS pins

in order to improve safety.

The device is configurable via SPI through a 32-bit protocol.

L9945

DS12275 - Rev 8

page 2/151

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