L9733
Octal self configuring Low/High side driver
Preliminary Data
Features
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■
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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
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.
SO-28
PowerSSO-28
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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.
Order codes
Part number
L9733
L9733XP
Package
SO-28
PowerSSO-28 (Exposed pad)
Packing
Tube
Tube
August 2006
Rev 3
1/33
www.st.com
1
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to
change without notice.
Contents
L9733
Contents
1
2
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1
2.2
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Absolute maximun ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3
Electrical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1
3.2
3.3
DC Characteristics: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
AC Characteristics: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
SPI Characteristics and timings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4
Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.1
Configurations for Outputs 1-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.1.1
4.1.2
Low Side Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
High Side Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.2
4.3
4.4
4.5
Outputs 1-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Outputs 6-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Drn1-8 Susceptibility To Negative Voltage Transients . . . . . . . . . . . . . . . 18
Supply pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.5.1
4.5.2
4.5.3
Main Power Input (Vdd) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Battery supply (Vbat) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Discrete Inputs Voltage Supply (VDO) . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.6
Discrete inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.6.1
4.6.2
Output 6-8 Enable Input (In6, ln7, ln8) . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Reset Input (RES) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5
Serial Peripheral Interface (SPI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.1
5.2
5.3
5.4
5.5
5.6
Serial Data Output (DO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Serial Data Input (DI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Chip Select (CS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Serial Clock (SCLK) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Initial Input Command Register & Fault Register SPI Cycle . . . . . . . . . . . 21
Input Command Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
2/33
L9733
Contents
6
Other L9733 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6.1
6.2
6.3
6.4
Charge Pump Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Waveshaping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
POR Register Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Thermal Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7
Fault Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
7.1
Low Side Configured Output Fault Operation . . . . . . . . . . . . . . . . . . . . . . 24
7.1.1
7.1.2
No latch mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Latch mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.2
High Side Configured Output Fault Operation . . . . . . . . . . . . . . . . . . . . . 26
7.2.1
7.2.2
No latch mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Latch mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
8
9
Package informations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
3/33
List of tables
L9733
List of tables
Table 1.
Table 2.
Table 3.
Table 4.
Table 5.
Table 6.
Table 7.
Table 8.
Table 9.
Table 10.
Table 11.
Table 12.
Pin Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Absolute maximun ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Thermal Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
DC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
AC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
SPI Characteristics and timings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Bit Command Register Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Command Register Logic Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Fault Register Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Fault Logic Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
4/33
L9733
List of figures
List of figures
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Pin Connection (Top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Output Turn On/Off Delays and Slew Rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
DO Loading for Disable Time Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
SPI Input/Output Slew Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
SPI Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
L9733 Application schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
L9733 HVAC applicative examplesL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
L9733 Powertrain applicative examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
SO28 Mechanical Data & Package Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
PowerSSO28 Mechanical Data & Package Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5/33
Talking
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