BUCK-BOOST CONVERTER
* ECE412_9.CIR
.PARAM T={1/15000} D={0.6}
Vb  4 2 PULSE(-1V 5V 0s 1ns 1ns {D*T} {T}) ;Transistor base drive
Vd  1 0 DC 24V
X1  1 4 2 XNPN
L   2 0 150uH IC=15.348A
D   3 2 DMOD
C   3 0 470uF IC=-36.98V
R   3 0 5ohm
.SUBCKT    XNPN       1       3       2   ; Home made NPN
*          name   collector  base  emitter
S1    1  6  5  2 SMOD
D1    6  2 DMOD
Rb    3  4 10ohm
Vb    4  2 DC 0V
RT    2  5 2ohm
CT    5  2 0.1uF
F1    2  5 POLY(1) Vb 0 50
.MODEL SMOD VSWITCH(Ron=0.001 Roff=10K Von=0.1V Voff=-0.1 )
.MODEL DMOD D(N=0.001)
.ENDS XNPN
.MODEL DMOD D(N=0.001)
.TRAN 5us 1ms  UIC
.PROBE
.END