UM1483 Datasheet, PDF (16/35 Pages) STMicroelectronics – Low power motor control board STEVAL-IHM036V1

Board description
Table 2. I/O assignment (continued)
LQFP48
Pin name Type
I/O assignment
36
V_{DD_2}
S
37
PA14
I/O PA14
38
PA15
I/O PA15
39
PB3
I/O PB3
40
PB4
I/O PB4
41
PB5
O PB5
42
PB6
O PB6
43
PB7
Not connected
44
BOOT 0
45
PB8
Not connected
46
PB9
Not connected
47
VSS_3
S
48
VDD_3
S
UM1483
MC using
JTAG
JTAG
JTAG
JTAG
LED 2
LED 1
GND
3.3.4
3.3.5
Power block based on IGBT module
The IGBT SLLIMM™ module STGIPN3H60 consists of high rugged IGBT power switches
and three smart drivers. STGIPN3H60 is provided with advanced gate smart drivers and
many features, such as integrated comparators for overcurrent or short-circuit protection,
free operational amplifier and the “SMART SHUTDOWN” function are available. Please
refer to the STMicroelectronics STGIPN3H60 device datasheets for more information.
Overcurrent protection
Hardware overcurrent protection (OCP) is implemented on the board. This feature takes
advantage of STGIPN3H60 SLLIMM™ module where an internal comparator is
implemented. Thanks to the internal connection between the comparator output and
shutdown block of the IPM, the intervention time of overcurrent protection is extremely low,
ranging slightly above 200 ns. Please see Figure 7 for a detailed view of OCP.
Overcurrent protection acts as soon as the voltage on the CIN pin rises above the internal
voltage reference (typical value V_{REF_INT} is 0.53 V). Considering the default value of the
OCP shunt resistor, it follows that the maximum allowed current is equal to:
Equation 1
I_SHUNT
MAX
=
-⁰---^.-⁵----³-----^×-----⁽---^R-----¹----^×------^R-----²-----+-----^R----²-----^×------^R-----³----+-----^R-----¹-----^×------^R----³----⁾--–----³---^.--³-----^×-----^R-----¹-----^×-----^R-----²--
R_SHUNT × R2 × R3
with the default values this gives:
I_{SHUNT_MAX} ~ 1.4 A
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Doc ID 022398 Rev 1