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L9945 Datasheet(PDF) 11 Page - STMicroelectronics

No. de pieza L9945
Descripción Electrónicos  Automotive fully configurable 8-channel High/Low side MOSFET pre-driver suitable for 12 V and 24 V systems
PDF  144 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9945 Datasheet(HTML) 11 Page - STMicroelectronics

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Pin #
Pin Name
Pin type PU/PD Active State HBM ESD (1)
Description
51
SNGP4
A
O
NA
NA
4 kV
NFET source / PFET gate on channel 4
32
DRN5
A
I
NA
NA
4 kV
FET drain on channel 5
31
GNSP5
A
O
NA
NA
4 kV
NFET gate / PFET source on channel 5
30
SNGP5
A
O
NA
NA
4 kV
NFET source / PFET gate on channel 5
29
BATT56
P
I
NA
NA
4 kV
Battery for channels 5 and 6
25
PGND56
G
I
NA
NA
4 kV
Power ground for channels 5 and 6
26
DRN6
A
I
NA
NA
4 kV
FET drain on channel 6
27
GNSP6
A
O
NA
NA
4 kV
NFET gate / PFET source on channel 6
28
SNGP6
A
O
NA
NA
4 kV
NFET source / PFET gate on channel 6
23
DRN7
A
I
NA
NA
4 kV
FET drain on channel 7
22
GNSP7
A
O
NA
NA
4 kV
NFET gate / PFET source on channel 7
21
SNGP7
A
O
NA
NA
4 kV
NFET source / PFET gate on channel 7
20
BATT78
P
I
NA
NA
4 kV
Battery for channels 7 and 8
24
PGND78
G
I
NA
NA
4 kV
Power ground for channels 7 and 8
17
DRN8
A
I
NA
NA
4 kV
FET drain on channel 8
18
GNSP8
A
O
NA
NA
4 kV
NFET gate / PFET source on channel 8
19
SNGP8
A
O
NA
NA
4 kV
NFET source / PFET gate on channel 8
SPI block (used for communication with external microcontroller)
15
SCK
D
I
PU
NA
2 kV
SPI clock
14
SDI
D
I
PU
NA
2 kV
SPI data in
10
SDO
D
O
NA
NA
2 kV
SPI data out. An external pull-down resistor in the [10k - 47k] range
must be mounted vs GNDIO.
13
NCS
D
I
PU
L
2 kV
SPI chip select
9
VIO
P
NA
NA
NA
2 kV
Supply voltage for SDO. Must be connected to the same power supply
as the SPI of the master device (usually the external microcontroller)
11
GNDIO
G
NA
NA
NA
2 kV
Ground for SPI. Must be shorted to GNDCP
Reset / Disable
12
NRES
D
I
PU
L
2 kV
Reset input. Must be connected to ECU reset
16
DIS
D
I
PU
H
2 kV
Disable input. Must be connected to the external microcontroller to allow
the disabling of the outputs 1-6.
45
NDIS
D
I/O
PD
L
2 kV
Negated disable input/output. Can be used as a negated disable input.
Can also be used as output to generate an interrupt in the external
microcontroller whenever the NDIS node is pulled down (internal disable
event)
47
EN6
D
I
PD
H
2 kV
Output 6 Enable. Can be used to enable output driver for safety relevant
load control.
Charge Pump
38
VGBHI
P
NA
NA
NA
2 kV
Charge pump output (battery + 12 V). Connected to VPS pin through a
“tank” capacitor
43
CH1
A
I/O
NA
NA
2 kV
1st node for flying capacitor 1
40
CH2
A
I/O
NA
NA
2 kV
2nd node for flying capacitor 1
41
CH3
A
I/O
NA
NA
2 kV
1st node for flying capacitor 2
39
CH4
A
I/O
NA
NA
2 kV
2nd node for flying capacitor 2
37
GNDCP
G
NA
NA
NA
2 kV
Ground for charge pump. Must be shorted to GNDIO
L9945
Device pins
DS12275 - Rev 10
page 11/144



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