L9733CNTR Datasheet, PDF (1/34 Pages) STMicroelectronics – Octal self configuring low/high side driver

L9733
Octal self configuring low/high side driver
Features
■ Eight independently self configuring low/high
drivers
■ Supply voltage from 4.5 V to 5.5 V
■ R_ON(max) = 0.7  @ T_j = 25 °C,
R_ON(max) = 1.2  @T_j = 125 °C
■ Minimum current limit of each output 1 A
■ Output voltage clamping min. 40 V in low-side
configuration
■ Output voltage clamping max. -14 V 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 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.
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 addition, 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 50 V
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 - 15 V).
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.
Table 1.
Device summary
Order code
L9733XP
L9733XPTR
L9733CN
L9733CNTR
Package
PowerSSO-28 (Exposed pad)
PowerSSO-28 (Exposed pad)
PowerSSO-28 (Exposed pad)
PowerSSO-28 (Exposed pad)
Packing
Tube
Tape and reel
Tube
Tape and reel
September 2013
Doc ID 11319 Rev 11
1/34
www.st.com
1