L9733 Datasheet, PDF (1/33 Pages) STMicroelectronics – Octal self configuring Low/High side driver

L9733
Octal self configuring Low/High side driver
Preliminary Data
Features
■ Eight independently self configuring low/high
drivers
■ Supply voltage from 4.5V to 5.5V
■ R_ON(max)=0.7Ω @ T_j = 25°C,
R_ON(max)=1.2Ω @T_j = 125°C
■ Minimum current limit of each output 1A
■ Output voltage clamping min. 40V in low side
configuration
■ Output voltage clamping max. -14V in high side
configuration
■ SPI interface for outputs control and for
diagnosis data communication
■ Additional PWM inputs for 3 outputs
■ Independent thermal shutdown for all outputs
Open load, Short to GND, short to Vb,
Overcurrent diagnostics in latched or unlatched
mode for each channel
■ Internal charge pump without need of external
capacitor
■ Controlled SR for reduced EMC
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.
SO-28
PowerSSO-28
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
Part number
L9733
L9733XP
Package
SO-28
PowerSSO-28 (Exposed pad)
Packing
Tube
Tube
August 2006
Rev 3
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to
change without notice.
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