VNH2SP30 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'VNH2SP30' PDF : 35 Pages View PDF
VNH2SP30-E
3
Application information
Application information
In normal operating conditions the DIAGX/ENX pin is considered as an input pin by the
device. This pin must be externally pulled high.
PWM pin usage: in all cases, a “0” on the PWM pin will turn off both LSA and LSB switches.
When PWM rises back to “1”, LSA or LSB turn on again depending on the input pin state.
Figure 32. Typical application circuit for DC to 20 kHz PWM operation short-circuit
protection
VCC
Reg 5V
C
+ 5V
3.3K
1K
DIAGA/ENA
1K
PWM
1K INA
10K CS
HSA
OUTA
LSA
VCC
M
DIAGB/ENB
HSB
OUTB
INB
LSB
+5V
3.3K
1K
1K
C
33nF
1.5K
GNDA
100K
S
G
D
b) N MOSFET
GNDB
Note:
The value of the blocking capacitor (C) depends on the application conditions and defines
the voltage and current ripple on the supply line at PWM operation. Stored energy from the
motor inductance may fly back into the blocking capacitor if the bridge driver goes into tri-
state. This causes a hazardous overvoltage if the capacitor is not large enough. As a basic
guideline, 500 µF per 10 A load current is recommended.
In case of a fault condition, the DIAGX/ENX pin is considered an output pin by the
device.The fault conditions are:
overtemperature on one or both high sides
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 be informed of which power element is in
fault by monitoring the INA, INB, DIAGA/ENA and DIAGB/ENB pins.
DocID10832 Rev 10
21/35
34
Share Link: 
