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L9954LXPTR

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L9954LXP Block diagram and pin description
Doc ID 16186 Rev 3 7/35
Table 2. Pin definitions and functions
Pin Symbol Function
1, 18, 19, 36 GND
Ground:
reference potential.
Important: for the capability of driving the full current at the outputs all
pins of GND must be externally connected.
2, 35 OUT6
High-side driver output 6
The output is built by a high-side switch and is intended for resistive
loads, hence the internal reverse diode from GND to the output is
missing. For ESD reason a diode to GND is present but the energy
which can be dissipated is limited. The high-side driver is a power
DMOS transistor with an internal parasitic reverse diode from the
output to V
S
(bulk-drain-diode). The output is over-current and open-
load protected.
Important: for the capability of driving the full current at the outputs both
pins of OUT6 must be externally connected.
3
4
5
OUT1
OUT2
OUT3
Half-bridge output 1,2,3
The output is built by a high-side and a low-side switch, which are
internally connected. The output stage of both switches is a power
DMOS transistor. Each driver has an internal parasitic reverse diode
(bulk-drain-diode: high-side driver from output to V
S
, switchs driver
from GND to output). This output is over-current and open-load
protected.
6, 7, 14, 25,
28, 32
V
S
Power supply voltage (external reverse protection required)
For this input a ceramic capacitor as close as possible to GND is
recommended.
Important: for the capability of driving the full current at the outputs all
pins of V
S
must be externally connected.
8DI
Serial data input
The input requires CMOS logic levels and receives serial data from the
microcontroller. The data is an 24bit control word and the least
significant bit (LSB, bit 0) is transferred first.
9 CM/PWM2
Current monitor output/PWM2 input
Depending on the selected multiplexer bits of input data register this
output sources an image of the instant current through the
corresponding high-side driver with a ratio of 1/10.000. This pin is
bidirectional. The microcontroller can overdrive the current monitor
signal to provide a second PWM input for the output OUT5.
10 CSN
Chip select not input
This input is low active and requires CMOS logic levels. The serial data
transfer between L9954LXP and micro controller is enabled by pulling
the input CSN to low-level.
11 DO
Serial data output
The diagnosis data is available via the SPI and this 3-state output. The
output remains in 3-state, if the chip is not selected by the input CSN
(CSN = high)
Block diagram and pin description L9954LXP
8/35 Doc ID 16186 Rev 3
12 V
CC
Logic supply voltage
For this input a ceramic capacitor as close as possible to GND is
recommended.
13 CLK
Serial clock input
This input controls the internal shift register of the SPI and requires
CMOS logic levels.
26 CP
Charge pump output
This output is provided to drive the gate of an external n-channel power
MOS used for reverse polarity protection.
27 PWM1
PWM1 input
This input signal can be used to control the drivers OUT1-OUT4 and
OUT6 by an external PWM signal.
31
33
OUT4,
OUT5
High-side driver output 4 and 5
Each output is built by a high-side switch and is intended for resistive
loads, hence the internal reverse diode from GND to the output is
missing. For ESD reason a diode to GND is present but the energy
which can be dissipated is limited. Each high-side driver is a power
DMOS transistor with an internal parasitic reverse diode from each
output to V
S
(bulk-drain-diode). Each output is over-current and open-
load protected.
15, 16, 17, 20,
21, 22, 23, 24,
29, 30, 34
NC Not connected pins.
Table 2. Pin definitions and functions (continued)
Pin Symbol Function
L9954LXP Electrical specifications
Doc ID 16186 Rev 3 9/35
2 Electrical specifications
2.1 Absolute maximum ratings
Stressing the device above the rating listed in the “Absolute maximum ratings” table may
cause permanent damage to the device. These are stress ratings only and operation of the
device at these or any other conditions above those indicated in the Operating sections of
this specification is not implied. Exposure to Absolute Maximum Rating conditions for
extended periods may affect device reliability. Refer also to the STMicroelectronics SURE
Program and other relevant quality document
2.2 ESD protection
2.3 Thermal data
Table 3. Absolute maximum ratings
Symbol Parameter Value Unit
V
S
DC supply voltage -0.3 to 28 V
Single pulse t
max
< 400 ms 40 V
V
CC
Stabilized supply voltage, logic supply -0.3 to 5.5 V
V
DI
, V
DO,
V
CLK
,
V
CSN,
V
pwm1
Digital input / output voltage -0.3 to V
CC
+ 0.3 V
V
CM
Current monitor output -0.3 to V
CC
+ 0.3 V
V
CP
Charge pump output -25 to V
S
+ 11 V
I
OUT1,2,3,4,5
Output current ±5 A
I
OUT6
Output current ±10 A
Table 4. ESD protection
Parameter Value Unit
All pins ± 2
(1)
1. HBM according to MIL 883C, Method 3015.7 or EIA/JESD22-A114-A.
kV
Output pins: OUT1 - OUT6 ± 8
(2)
2. HBM with all unzapped pins grounded.
kV
Table 5. Operating junction temperature
Symbol Parameter Value Unit
T
j
Operating junction temperature -40 to 150 °C
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L9954LXPTR

Mfr. #:
Buy L9954LXPTR
Manufacturer:
STMicroelectronics
Description:
Motor / Motion / Ignition Controllers & Drivers Door Actuator Driver 0.75A 1600mOhm
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