kicad/qa/data/eeschema/issue13431.spice

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2023-01-21 18:07:06 +00:00
KiCad schematic
.save all
.probe alli
.tran 10us 20ms uic
.option INTERP
.subckt OPAMP INon IInv out Vp Vm g=100k
bGain gain gnd v={g*v(INon, IInv)}
bOut out gnd v={v(gain)> v(Vp) ? v(Vp) : v(gain) < v(Vm) ? v(Vm) : v(gain)}
.ends OPAMP
.subckt SG3525 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
* Voltage reference
.param Vref = 5.1V
bVref 16 12 v={Vref < v(15, 12) ? Vref : v(15) }
* Error amplifier (opamp)
xOpampError 2 1 9 15 12 OPAMP
* Measure Ct
aCtMeter 5 CtVal ctest
.model ctest cmeter(gain=1.0)
* Measure Rt
vRtMeasI 16 6 0
bRt 12 RtVal v={-Vref/i(vRtMeasI)}
* Triangular wave oscillator
* f = 1/(Ct*0.7*Rt)
bFreq freq 12 v={(1/(v(CtVal)*0.7*v(RtVal))) < 1 ? 1 : 1/(v(CtVal)*0.7*v(RtVal))}
aTriOsc freq carrier trigen
.model trigen triangle(cntl_array = [10 500e3]
+freq_array=[10 500e3] out_low = 0
+out_high = {Vref} duty_cycle = 0.999)
* Carrier debug (send it to OSC output)
Rtie carrier 4 0
* PWM
bOutA 11 12 v={min(v(9), v(8)) > v(carrier)+v(12) ? v(doShutdown,12) < {Vref/2} ? v(13) : v(12) : v(12) }
bOutB 14 12 v={min(v(9), v(8)) < v(carrier)+v(12) ? v(doShutdown,12) < {Vref/2} ? v(13) : v(12) : v(12) }
* Soft Start
.param IssVal = 50u
Iss 12 8 {IssVal}
a1 12 8 vclamp
.model vclamp zener(v_breakdown={Vref} i_breakdown={IssVal})
*.model vclamp sidiode(Vrev={Vref})
* Shutdown
bShutdown doShutdown 12 v={v(10,12) > 0.8 ? {Vref} : v(12) }; Threshold on pin 10 is around 0.8V
sShutdownSwitch 8 12 doShutdown 12 sswitch ON
.model sswitch SW(RON=3k VT={Vref/2})
.ends SG3525
C4 /ct GND 150n
R1 /rt GND 3.22k
C3 +15V GND 100n
XU1 /opamp_buff_fb Net-_U1-NI_ unconnected-_U1-SYNC-Pad3_ unconnected-_U1-OSC-Pad4_ /ct /rt /ct /soft_start /opamp_buff_fb GND /pwm_to_driver GND +15V unconnected-_U1-OUTB-Pad14_ +15V /vref SG3525
C1 /vref GND 100n
V3 Net-_U1-NI_ GND 4.5
V1 +15V GND 15
V2 GND -15V 15
C2 /soft_start GND 100n
.end