.SMPS.Switch

Contents

Name	Description
ActiveSwitchAb	An abstract model that defines pins, common to all active switches, derived from this model. Typically 'ctrl', relative to 'gnd', will determine whether the connection between 'p' and 'n' is opened or closed. Current from/to 'ctrl' will typically be negligible.
NMosfet	Enhancement mode NMOSFET transistor, modeled for typical switching operations, i.e. when Vgs>Vgsth, the transistor conducts between its drain and source.
PMosfet	Depleted mode PMOSFET transistor, modeled for typical switching operations, i.e. when Vgs<Vgsth, the transistor conducts between its drain and source. This transistor is complementary to the enhancement mode NMOSFET, i.e. it conducts when Vgs is very small.
Diode	A model of a typical diode with the knee voltage and conducting mode differential resistance. The diode can be used as a passive single quadrant switch, conducting positive on-state currents and blocking negative off-state voltages. Note: the model does not include reverse recovery losses yet, this will be implemented in the future.
GateDriver	A gate driver ensures that a high switching signal is converted into the proper gate to source voltage, ensuring that the signal will actually switch the MOSFET transistor to ON or OFF state. The gate driver should be connected as follows: dp - PWM modulator's positive pin dn - PWM modualtor's negative pin gp - MOSFET's gate pin tn - MOSFET's source pin
SingleQuadrantSwitch	A single quadrant switch, conductiong positive on-state currents and blocking positive off-state voltages. The switch is implemented as an enhancement mode NMOSFET transistor with a gate driver included.
CurrentBidirectionalSwitch	A current bidirectional two quadrant switch, conducting positive or negative on-state currents and blocking positive off-state voltages. The switch is implemented using an enhancement mode NMOSFET transistor and a diode, connected in parallel. A gate driver for the transistor is included.
VoltageBidirectionalSwitch	A voltage bidirectional two quadrant switch, conducting positive on-state currents and blocking positive or negative off-state voltages. The switch is implemented using an enhancement mode NMOSFET transistor and a diode, connected in series. A gate driver for the transistor is included.
FourQuadrantSwitch	A four quadrant switch, conducting positive or negative on-state currents and blocking positive or negative off-state voltages. The switch is implemented as a pair of two voltage biderectional switches, connected in paralel and in opposite directions. Both transistors and diodes are identitcal. Gate driver for the transistors are included.