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VNH2SP30-E bảng dữ liệu(PDF) 22 Page - STMicroelectronics

tên linh kiện VNH2SP30-E
Giải thích chi tiết về linh kiện  Automotive fully integrated H-bridge motor driver
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
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VNH2SP30-E bảng dữ liệu(HTML) 22 Page - STMicroelectronics

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Application information
VNH2SP30-E
22/35
DocID10832 Rev 10
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.
Figure 33. Behavior in fault condition (how a fault can be cleared)
Note:
In case of the fault condition is not removed, the procedure for unlatching and sending the
device into Stby mode is:
- Clear the fault in the device (toggle : INA if ENA=0 or INB if ENB=0)
- Pull low all inputs, PWM and Diag/EN pins within tDEL.
If the Diag/En pins are already low, PWM=0, the fault can be cleared simply toggling the
input. The device will enter Stby mode as soon as the fault is cleared.
3.1
Reverse battery protection
Three possible solutions can be considered:
1.
a Schottky diode D connected to VCC pin
2.
an N-channel MOSFET connected to the GND pin (see Figure 32: Typical application
circuit for DC to 20 kHz PWM operation short-circuit protection on page 21)
3.
a P-channel MOSFET connected to the VCC pin
IN
A
IN
B
DIAG
A
EN
A
DIAG
B
EN
B
Iout
A  outB
FAULT
A
(Internal Signal)
FAULT
B
(Internal Signal)
Normal
Operation
OUT
B shorted
to V
CC
t
DEL
Fault Cleared
Stby (*)
Normal
Operation
OUT
B shorted
to GND
t
DEL
Fault Cleared
Normal
Operation
Device Latched
Device Latched
Device Unlatched
IN
A
IN
B
DIAG
A
EN
A
DIAG
B
EN
B
Iout
A  outB
FAULT
A
(Internal Signal)
FAULT
B
(Internal Signal)
Normal
Operation
OUT
B shorted
to V
CC
t
DEL
Fault Cleared
Stby (*)
Normal
Operation
OUT
B shorted
to GND
t
DEL
Fault Cleared
Normal
Operation
Device Latched
Device Latched
Device Unlatched



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