Board description
UM1036
22/48
Doc ID 18293 Rev 1
Figure 12.
Six-step current sensing configuration
Table 2
shows the mentioned setting of gain jumpers for this configuration.
3.3.7
The tachometer and Hall/encoder inputs
Both the tachometer and Hall/encoder inputs have been implemented on the board. When
using a Hall or encoder sensor, the W5 jumper must be connected and the W4 jumper
disconnected. The W6 jumper set to position “A” allows to supply any connected Hall sensor
with the same supply voltage as other hardware peripherals (+3.3 VDC or
+5 VDC depending on the W1 jumper). Setting the W6 jumper to position “B” supplies the
Hall sensor directly with +5 VDC, which is the most common voltage for a Hall sensor. The
U4 Hex Schmitt inverter is used as the voltage level shifter for connected Hall sensors. If
using a tachometer, jumper W5 must be disconnected and jumper W4 connected.
This type of adjustable feature allows the testing and evaluating of motors with a wide
spectrum of various sensors.
3.3.8
Temperature feedback and overtemperature protection (OTP)
Hardware overtemperature protection is implemented on the STEVAL-IHM028V1
demonstration board. This feature fully protects the IPM module against damage when the
temperature on the junction on the IPM surpasses a defined value. The temperature is
6
436
/0
/0
'.$
6
2 22
2 2
2
22
R 22
2 22
R 2
2(3
SENSE
RESISTOR
2,3
SENSE
RESISTOR
/0!-0
/0/54
!-
Table 2.
Gain settings for six-step current reading configuration
Setting for six-step configuration
Single-shunt configuration
Setting of gain
W11
Not present
W12
Not present
W13
Not present
W14
Not present
