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STMicroelectronics Electronic Components Datasheet

L9958 Datasheet

Low RDSON SPI controlled H-Bridge

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L9958 pdf
L9958
Low RDSON SPI controlled H-Bridge
'!0'03
PowerSO-20
'!0'03
PowerSSO24
'!0'03
PowerSO16
Features
Programmable current regulation peak
threshold by SPI up to 8.6 A typ.
Operating battery supply voltage 4.0 V to 28 V
Operating Vdd supply voltage 4.5 V to 5.5 V
All pins withstand 19 V, Vs and output pins
withstand 40 V
Full path Ron from 100 mΩ (at Tj = -40 °C) to
300 mΩ (at Tj =150 °C)
Logic inputs TTL/CMOS-compatible
Operating frequency up to 20 kHz
16-bit SPI interface for
configuration/diagnostics, daisy chain
capability
Over temperature and short circuit protection
VS undervoltage disable function
Vdd undervoltage and overvoltage protection
Vdd overvoltage detection
Open-load detection in ON condition
Full diagnostics in OFF state
Enable and disable input
Low stand by current (<10 μA)
Voltage and current slew-rate control for low
EMI, programmable through SPI
Available in three power packages
Description
The L9958 is an SPI controlled H-Bridge,
designed for the control of DC and stepper motors
in safety critical applications and under extreme
environmental conditions.
Datasheet - production data
The H-Bridge is protected against over
temperature, short circuits and has an
undervoltage lockout for all the supply voltages Vs
and Vdd, and for overvoltage on Vdd. All
malfunctions cause the output stages to go
tristate.
Detailed failure diagnostics on each channel is
provided via SPI: short circuit to battery, short
circuit to ground, short circuit overload, over
temperature.
Open-load can be detected in ON condition, for
the widest application ranges. Current regulation
threshold can be set by SPI from 2.5 A to 8.6 A
(Typ.), in 4 steps. Guaranteed accuracy is ±10 %
on all temp range, using an external reference
resistor with 1% accuracy over all temp range.
Current limitation threshold is linearly reduced by
temperature over 165 °C.and a thermal warning
bit is set by SPI. The H-Bridge contains integrated
free-wheel diodes. In case of free-wheeling
condition, the low side transistor is switched on in
parallel of its diode to reduce power dissipation.
A multiple wire bonding technique, as well as ST
proprietary package design is making L9958
compatible with three power packages, for
maximum flexibility:
PowerSO-20 package (medium power, JEDEC
standard MO166);
PowerSO16 package (medium power, lower
cost);
PowerSSO24 package (low power, very low cost
JEDEC standard MO271A).
Table 1. Device summary
Order code
Package
Packing
L9958
PowerSO-20
Tube
L9958SB
PowerSO16
Tube
L9958XP
PowerSSO24
Tube
December 2013
This is information on a product in full production.
DocID17269 Rev 6
1/38
www.st.com


STMicroelectronics Electronic Components Datasheet

L9958 Datasheet

Low RDSON SPI controlled H-Bridge

No Preview Available !

L9958 pdf
Contents
Contents
L9958
1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 PowerSO-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 PowerSO16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3 PowerSSO24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3 Device description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1 Supply range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.2 Control inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.2.1 DI and EN inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.2.2 DIR and PWM inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.3 Serial peripheral interface (SPI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.3.1 Daisy chain operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.4 SPI timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.5 SPI communication failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.6 5 V and 3.3 V output compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4 Current regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.1 Temperature-dependent current regulation . . . . . . . . . . . . . . . . . . . . . . . 16
4.2 Current regulation with low-inductive loads . . . . . . . . . . . . . . . . . . . . . . . 17
4.3 Slew rate control in case of current limitation on low-side . . . . . . . . . . . . 17
5 Diagnostics and protections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.1 Diagnosis reset strategy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.1.1 Reset requests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.1.2 Diagnosis reset bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.2 Protection and on state diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.2.1 Over-current on high-side - short to ground . . . . . . . . . . . . . . . . . . . . . . 20
5.2.2 Over-current on low-side - short to Vs . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.2.3 Short circuit over-load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.2.4 Open load in on state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.2.5 Over-temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
2/38 DocID17269 Rev 6


Part Number L9958
Description Low RDSON SPI controlled H-Bridge
Maker STMicroelectronics
Total Page 30 Pages
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