VNH2SP30 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
VNH2SP30 Datasheet PDF : 35 Pages
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Application information
VNH2SP30-E
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)
INA
INB
DENIAA GA
DENIAB GB
IoutA outB
Device Latched
Device Latched
Device Unlatched
FAULTA
(Internal Signal)
FAULTB
(Internal Signal)
Normal
Operation
tDEL
OUTB shorted Fault Cleared
to VCC
Stby (*)
tDEL
Normal
OUTB shorted Fault Cleared
Operation
to GND
Normal
Operation
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
22/35
DocID10832 Rev 10
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