Preliminary Data

This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to

change without notice.

August 2006

Rev 3

1/33

1

L9733

Octal self configuring Low/High side driver

Features

drivers

configuration

configuration

diagnosis data communication

Open load, Short to GND, short to Vb,

Overcurrent diagnostics in latched or unlatched

mode for each channel

capacitor

Description

The L9733 IC is a highly flexible monolithic,

medium current, output driver that incorporates 8

outputs that can be used as either internal low or

high side drives in any combination.

Outputs 1-8 are self-configuring as high or low

side drives. Self-configuration allows a user to

connect a high or low side load to any of these

outputs and the L9733 will drive them correctly as

well as provide proper fault mode operation with

no other needed inputs. In additon, Outputs 6, 7 and

8 can be PWM controlled via a external pins (IN6-8).

This device is capable of switching variable load

currents over the ambient range of -40°C to

+125°C. The outputs are MOSFET drivers to

minimize Vdd current requirements. For low side

configured outputs an internal zener clamp from

the drain to gate with a breakdown of 50V

minimum will provide fast turn off of inductive

loads. When a high side configured output is

commanded OFF after having been commanded

ON, the source voltage will go to (VGND - 15V).

An 16 bit SPI input is used to command the 8

output drivers either "On" or "Off", reducing the

I/O port requirement of the microcontroller.

Multiple L9733 can be daisy-chained. In addition

the SPI output indicates latched fault conditions

that may have occurred.

Order codes

SO-28

PowerSSO-28

Part number

Package

Packing

L9733

SO-28

Tube

L9733XP

PowerSSO-28 (Exposed pad)

Tube

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