Datasheet
TMC2590 DATASHEET (V1.0 / 2019-FEB-22) 45
www.trinamic.com
12 Diagnostics and Protection
12.1 Short Protection
The TMC2590 protects the MOSFET power stages against a short circuit or overload condition by
monitoring the voltage drop in the high-side MOSFETs, as well as the voltage drop in sense resistor
and low-side MOSFETs (Figure 12.1). A programmable short detection delay (shortdelay) allows
adjusting the detector to work with different power stages and load conditions. Additionally, the
short detection is protected against single events, e.g. caused by ESD discharges, by retrying three
times before switching off the motor continuously. The low side short detector also provides for
overcurrent detection. It needs to be explicitly enabled by programming.
Parameter
Description
Setting
Comment
SHRTSENS
The high-side overcurrent detector can be set to a
higher sensitivity by setting this flag. This will
allow detection of wrong cabling even with
higher resistive motors.
0/1
0: Low sensitivity
1: High sensitivity
TS2G
Short detection delay for high-side and low side
detectors. The short detection delay shall cover
the bridge switching time. %01 will work for most
applications. A higher delay makes detection less
sensitive to capacitive load.
0/1
%00: 3.2µs.
%01: 1.6µs.
%10: 1.2µs.
%11: 0.8µs.
DIS_S2G
Allows to disable short to VS protection.
0/1
Leave detection enabled
for normal use (0).
EN_S2VS
Explicitly enable short to VS and overcurrent
protection by setting this bit.
0/1
Enable detection for
normal use (1).
LS short
detection
(S2VS)
No-short
area
HS short
detection
(S2G)
No-short
area
BMx
(coil output
voltage)
Internal high-side
driver enable
V
S
-V
BM
S2G level
0V
V
S
t
SD
detection active
Short to GND monitor phase
Internal Error Flag
t
SD
Short detected
short
delay
short
delay
inactive
Short to GND
detected
Driver disable
0
1
0
1
Output
floating
S2VS level
V
BM
Short to VS monitor phase
short
delay
inactive
detection
active
inactive
inactive
t
SD
Internal low-side
driver enable
0
1
Figure 12.1 Short detection timing