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VNH3ASP30-E Datasheet(Hoja de datos) 8 Page - STMicroelectronics

No. de Pieza. VNH3ASP30-E
Descripción  AUTOMOTIVE FULLY INTEGRATED H-BRIDGE MOTOR DRIVER
Descarga  18 Pages
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Fabricante  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
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VNH3ASP30-E
8/18
Figure 5. Typical Application Circuit For Dc To 20KHz PWM Operation
In case of a fault condition the DIAGX/ENX pin is consid-
ered as an output pin by the device.
The fault conditions are:
- overtemperature on one or both high sides (for example
if a short to ground occurs as it could be the case
described in line 1 and 2 in the table below);
- short to battery condition on the output (saturation
detection on the Low-Side Power MOSFET).
Possible origins of fault conditions may be:
OUTA is shorted to ground ---> overtemperature
detection on high side A.
OUTA is shorted to VCC ---> Low-Side Power MOSFET
saturation detection.
When a fault condition is detected, the user can know
which power element is in fault by monitoring the INA,
INB, DIAGA/ENA and DIAGB/ENB pins. In any case,
when a fault is detected, the faulty leg of the bridge is
latched off. To turn-on the respective output (OUTX)
again, the input signal must rise from low to high level.
Table 15. Truth Table In Fault Conditions (detected on OUTA)
M
µC
Reg 5V
+ 5V
HSA
HSB
LSA
LSB
VCC
DIAGA/ENA
CS
INA
PWM
OUTA
OUTB
D
S
G
b) N MOSFET
3.3K
1K
1K
1K
10K
33nF
1.5K
VCC
100K
INA
INB
DIAGA/ENA
DIAGB/ENB
OUTA
OUTB
CS
1
1
0
1
OPEN
H
High Imp.
1
0
0
1
OPEN
L
High Imp.
0
1
0
1
OPEN
H
IOUTB/K
0
0
0
1
OPEN
L
High Imp.
X
X
0
0
OPEN
OPEN
High Imp.
X
1
0
1
OPEN
H
IOUTB/K
X
0
0
1
OPEN
L
High Imp.
Fault Information
Protection Action




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