Programming instructions

SMPS Transient Virtual
 National Instruments Corporation 12-13 Multisim Component Reference Guide
Internal error amplifier parameters:
 To view or change a component’s model parameters:
1. Double-click on the placed component and select the Valu e 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.
12.1.9 2SWITCHCM
The 2SWITCHCM is a generic model for two-switch Current Mode PWM controllers. This is
the two-switch version of PWMCM, which provides only one driver signal for single-switch
converters.
Parameter Description
VHIGH Maximum output voltage
VLOW Minimum output voltage
ISINK Current sink capability
ISOURCE Current source capability
POLE First pole in Hertz
GAIN DC open-loop gain (default = 90 dB)
Pin No. Pin Name Description
1 OUT1 PWM signal Output 1 (MOSFET switch1
signal)
8 GNF Voltage reference for OUT1
7 OUT2 PWM signal Output 2 (MOSFET switch2
signal)
2 GND Ground
3 COMP Error amplifier output
4 FB Output voltage feedback input
5 ISENSE Switch current sensing
6 VOSC Oscillator ramp signal output (provided for
ramp compensation purposes)
ComponentRef.book Page 13 Thursday, December 7, 2006 10:12 AM