ST STEVAL-IPMM10B, Руководство пользователя, Страница: 14 / 34

Based on the previous equations and conditions, minimum shunt resistance and power rating is summarized in
Section 4.3.3 table .
Table 2. Shunt selection
Device
OCP
(peak)
[A]
I
load(max)
[Arms]
R
SHUNT
[Ω]
Shunt power rating
P
SH
[W]
STIB1060DM2T-L 9.8 4.2 0.08 2
4.3.4 RC filter
An RC filter network is required to prevent undesired short circuit operation due to the noise on the shunt resistor.
In this design, the RC filter, composed of R23, R18, R21, R24 and C19, has a constant time of about 1.3 μs.
Adding the turn-off propagation delay of the gate driver and the MOSFET turn-off time (hundreds of nanoseconds
in total), the total delay time is less than 5 μs of short circuit withstand MOSFET time.
4.3.5 Single- or three-shunt selection
Single- or three-shunt resistor circuits can be adopted by setting the solder bridges SW5, SW6, SW7 and SW8.
The figures below illustrate how to set up the two configurations.
Figure 13. One-shunt configuration
Figure 14. Three-shunt configuration
UM2702
Overcurrent protection
UM2702 - Rev 1
page 14/34