Programming instructions

Power
Multisim Component Reference Guide 12-4 ni.com
 To view or change a component’s model parameters:
1. Double-click on the placed component and select the Value tab.
2. Click Edit Model to display the Edit Model dialog box.
3. View or edit the model parameters as desired. For more information on the Edit Model
dialog box, refer to the Multisim User Guide, or the Multisim helpfile.
12.1.3 PUSH_VM
The PUSH_VM is a generic model for Voltage Mode Push-Pull PWM controllers. Push-pull
is an isolated version of a buck converter. Due to utilization of the transformer, the output
voltage of a push-pull converter can be either higher or lower than the input voltage. The
push-pull converter is able to operate at a duty cycle close to 1.
ISOURCE Current source capability
POLE First pole in Hertz
GAIN DC open-loop gain (default = 90 dB)
Parameter Description
Pin No. Pin Name Description
1 OUT1 PWM signal Output 1 (MOSFET1 switch
signal)
7 OUT2 PWM signal Output 2 (MOSFET2 switch
signal)
2 GND Ground
3 COMP Error amplifier output
4 FB Output voltage feedback input
5 ISENSE Switch current sensing (for current limit)
ComponentRef.book Page 4 Thursday, December 7, 2006 10:12 AM