4.2
Operations
4.2.1
Power on and testing environment
Connect a 37 V power supply to CN1, the load on CN2.
The telecommand section is available on the TC3 connector. Separated signals TC_ON and TC_OFF are applied
to drive properly the telecommand interface.
Connect a jumper on SW1 in the position 1-2 to set the latched-OFF configuration, or in the position 2-3 for
latched-ON one.
Analog and digital telemetries are accessible on the R
TM
and R
STS
resistors respectively.
Figure 13.
Testing environment
4.2.2
Trip-off time programming
In latched mode, if the duration of the overcurrent is greater than the trip-off time T
ON
, the device remains in
current limitation for the T
ON
interval, after the external MOSFET is switched OFF and stays OFF until the device
is reset through the telecommand interface or UVLO activation/deactivation cycling. The trip-off time T
ON
is set by
the C
ON
capacitor connected between the pins TON and GND, and it is calculated by the following formula:
TON = RIR*CON
(9)
UM2605
Operations
UM2605
-
Rev 1
page 13/27