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PDF L9958XP Data sheet ( Hoja de datos )
| Número de pieza | L9958XP | |
| Descripción | Low RDSON SPI controlled H-Bridge | |
| Fabricantes | STMicroelectronics | |
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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
1 page  
L9958
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.
Figure 11.
Figure 12.
Figure 13.
Figure 14.
Figure 15.
Figure 16.
Figure 17.
Figure 18.
Figure 19.
Figure 20.
Figure 21.
Figure 22.
Figure 23.
Figure 24.
Figure 25.
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
PowerSO-20 pin connection (top view). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
PowerSO16 pin connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
PowerSSO24 pin connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
H-Bridge configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
SPI protocol structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
FSI bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Daisy chain topology. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
SPI timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
SPI zero clock communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Current limitation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Temperature dependent current regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Current regulation with different loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Slew rate switching strategy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Diagnostics for SCB / SCOL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Open load in on state - Low-side current recirculation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Battery voltage monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Off-state detection scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Open load detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Off-state diagnostic principle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Thermal impedance (junction-ambient) of power packages . . . . . . . . . . . . . . . . . . . . . . . . 26
Application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
PowerSO-20 mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . 34
PowerSO16 mechanical data and package dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . 35
PowerSSO24 mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . 36
DocID17269 Rev 6
5/38
5
5 Page 
L9958
3.2.2
Device description
DIR and PWM inputs
The pins DIR and PWM are internally pulled down. The bridge is controlled by these two
inputs according to the table below.
Table 6. Control pins DIR, PWM
DIR
PWM
OUT1
OUT2
Bridge Status
H H H L Forward
L L L L Freewheeling Low
L H L H Reverse
H L L L Freewheeling low
Figure 5. H-Bridge configurations
/54
),
6
/54
/54
),
6
/54
$)2 07- &ORWARD
$)2 07- &REEWHEELING ,3
/54
),
6
/54
/54
),
6
/54
$)2 07- 2EVERSE
$)2 07- &REEWHEELING ,3
'!0'03
The outputs can be disabled (set to tri-state) by the Disable and Enable inputs DI and EN.
Input DI has an internal pull-up. Input EN has an internal pull-down. During freewheeling
phase, an active freewheeling on the Low-Side MOS is automatically set, switching ON the
power transistor in parallel to the internal freewheeling diode.
DocID17269 Rev 6
11/38
37
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet L9958XP.PDF ] | |
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