Short Circuit Load

The Short Circuit Load subcircuit models the application of a short circuit at a user-defined time point. Using the recover argument, you can remove the short circuit and test the recovery of the circuit. In DVM, this load is used in the built-in testplans for the ShortCkt() Test Objective.

Other similar loads include:

  • Ramp Load - a ramped load where the starting current is modeled with a resistor and the ramp current is modeled with a PWL current source
  • Ramp Pure Load - a ramped load where both the starting current and the ramp current are modeled with a current source
  • Pulse Load - Single Current Pulse - a single current pulse load with the starting current modeled with a resistor
  • Pulse Load - Single Pure Current Pulse - a single current pulse load without any resistive  component

In this topic:

  DVM Information Power Supply (Non-DVM) Information
Model Name Short Circuit Load
Simulator
Parts Selector
Menu Location
  • DVM > Loads > DVM Output Load - 2 Terminal
  • DVM > Loads > DVM Output Load - 3 Terminal
  • DVM > Loads > DVM Output Load - 4 Terminal
Power Supply Loads > Power Supply Load ( DC Current, Pulse, Bode, Zout... )
Symbol Library SIMPLIS_DVM_ADVANCED.sxslb power_supply_source_and_loads.sxslb
Model File SIMPLIS_DVM_ADVANCED.lb power_supply_source_and_loads.lb
Subcircuit Name
  • SIMPLIS_DVM_ADVANCED_LOAD_2T_RES_SHORTCKT
  • SIMPLIS_DVM_ADVANCED_LOAD_3T_RES_SHORTCKT
  • SIMPLIS_DVM_ADVANCED_LOAD_4T_RES_SHORTCKT
 POWER_SUPPLY_LOAD_RES_SHORTCKT
Symbols
Schematic - 2 Terminal
Note: Power Supply probes will not have the "DVM" prefix.
Schematic - 3 Terminal
Note: Power Supply probes will not have the "DVM" prefix.
Schematic - 4 Terminal
Note: Power Supply probes will not have the "DVM" prefix.

Parameters

The following table explains the parameters used in the short circuit load subcircuit..

Parameter Name Default Data Type Range Units Parameter Description
LOAD_NAME LOAD String n/a n/a Name of the DVM load. This name cannot contain spaces.
LOAD_RESISTANCE 2.00667 Real min: 0 Ω The resistance value which models the starting current of the load.
PULSE_WIDTH 200u Real min: 0 s The pulse width of the short circuit in seconds.
SHORTCKT_LOAD_RESISTANCE 10m Real min: >0 Ω The resistance of the short circuit condition.
TIME_DELAY 10u Real min: 0 s The time delay before the short circuit initiates.

Timing

During a ShortCkt() test, DVM sets the output under test to use the short circuit load subcircuit. Then DVM automatically sets the TIME_DELAY and PULSE_WIDTH parameters for the Ramp Load. You can change the timing with the Ramp() function call by providing the timing parameters as an optional parameter string. The optional parameter string is the third or fourth argument to the ShortCkt() load function call.

Converting between DVM and Power Supply Loads

To change a Power Supply load to a DVM load, right click the symbol to bring up the context menu, and select the menu option: Upgrade to DVM Source/Load

To change a DVM load to a Power Supply load, right click the symbol to bring up the context menu, and select the menu option: Downgrade to SIMetrix/SIMPLIS Source/Load

Collected links
ShortCkt() Test Objective
Ramp Load
Ramp Pure Load
Pulse Load - Single Current Pulse
Pulse Load - Single Pure Current Pulse