{
"metadata": {
"name": ""
},
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"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"CHAPTER 24 REGULATED POWER SUPPLIES"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 24-1, Page 954 "
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"Rs=10 #given source resistance Rs(Ohm)\n",
"RL=40 #given load resistance RL(Ohm)\n",
"Vin=15 #input voltage(V)\n",
"VBE=0.8 #base-emitter voltage drop(V) \n",
"Vz=9.1 #voltage across diode(V)\n",
"\n",
"Vout=Vz+VBE #output voltage(V) \n",
"Is=1000*(Vin-Vout)/Rs #input current(mA) \n",
"IL=1000*Vout/RL #load current(mA)\n",
"IC=Is-IL #collector current(mA)\n",
"\n",
"print 'Output voltage Vout = ',Vout,'V'\n",
"print 'input current Is = ',Is,'mA'\n",
"print 'load current IL = ',IL,'mA'\n",
"print 'collector current IC = ',IC,'mA'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Output voltage Vout = 9.9 V\n",
"input current Is = 510.0 mA\n",
"load current IL = 247.5 mA\n",
"collector current IC = 262.5 mA\n"
]
}
],
"prompt_number": 1
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 24-2, Page 954"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"Rs=10 #given source resistance Rs(Ohm)\n",
"RL=40 #given load resistance RL(Ohm)\n",
"Vin=15 #input voltage(V)\n",
"VBE=0.81 #base-emitter voltage drop(V) \n",
"Vz=6.2 #voltage across diode(V)\n",
"R1=750 #base input resistance(Ohm)\n",
"R2=250 #base input resistance(Ohm)\n",
"\n",
"Vout=(Vz+VBE)*(R1+R2)/R1 #output voltage(V) \n",
"Is=1000*(Vin-Vout)/Rs #input current(mA) \n",
"IL=1000*Vout/RL #load current(mA)\n",
"IC=Is-IL #collector current(mA)\n",
"\n",
"print 'Output voltage Vout = ',round(Vout,2),'V'\n",
"print 'input current Is = ',round(Is,2),'mA'\n",
"print 'load current IL = ',round(IL,2),'mA'\n",
"print 'collector current IC = ',round(IC,2),'mA'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Output voltage Vout = 9.35 V\n",
"input current Is = 565.33 mA\n",
"load current IL = 233.67 mA\n",
"collector current IC = 331.67 mA\n"
]
}
],
"prompt_number": 1
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 24-3, Page 954"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"Vout=9.35 #output voltage(V)\n",
"IL=234 #load current(mA)\n",
"Is=565 #input current(mA)\n",
"Vin=15.0 #input voltage(V)\n",
"\n",
"Pout=Vout*IL/1000 #output power(W)\n",
"Pin=Vin*Is/1000 #input power(W)\n",
"eff=Pout/Pin #efficiency\n",
"preg=Pin-Pout #power dissipated by regulator(W)\n",
"\n",
"print 'input power Pin = ',Pin,'W'\n",
"print 'Output power Pout = ',round(Pout,2),'W'\n",
"print 'Effifciency = ',round((eff*100),2),'%'\n",
"print'power dissipated by regulator = ',round(preg,2),'W'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"input power Pin = 8.475 W\n",
"Output power Pout = 2.19 W\n",
"Effifciency = 25.82 %\n",
"power dissipated by regulator = 6.29 W\n"
]
}
],
"prompt_number": 2
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 24-4, Page 955"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"Rs=10 #given source resistance Rs(Ohm)\n",
"RL=40 #given load resistance RL(Ohm)\n",
"Vin=15 #input voltage(V)\n",
"Vz=6.8 #voltage across diode(V)\n",
"R1=7.5*10**3 #base input resistance(Ohm)\n",
"R2=2.5*10**3 #base input resistance(Ohm)\n",
"\n",
"Vout=Vz*(R1+R2)/R1 #output voltage(V) \n",
"Is=1000*(Vin-Vout)/Rs #input current(mA) \n",
"IL=1000*Vout/RL #load current(mA)\n",
"IC=Is-IL #collector current(mA)\n",
"\n",
"print 'Output voltage Vout = ',round(Vout,2),'V'\n",
"print 'input current Is = ',round(Is,2),'mA'\n",
"print 'load current IL = ',round(IL,2),'mA'\n",
"print 'collector current IC = ',round(IC,2),'mA'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Output voltage Vout = 9.07 V\n",
"input current Is = 593.33 mA\n",
"load current IL = 226.67 mA\n",
"collector current IC = 366.67 mA\n"
]
}
],
"prompt_number": 3
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 24-5, Page 956"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"Is1=510 #input current in ex. 24-1 (mA)\n",
"Is2=565 #input current in ex. 24-2 (mA)\n",
"Is4=593 #input current in ex. 24-4 (mA)\n",
"\n",
"Imax1=Is1 #maximum load current (mA) \n",
"Imax2=Is2 #maximum load current (mA) \n",
"Imax4=Is4 #maximum load current (mA) \n",
"\n",
"print 'maximum load current Imax1 = ',Imax1,'mA'\n",
"print 'maximum load current Imax2 = ',Imax2,'mA'\n",
"print 'maximum load current Imax4 = ',Imax4,'mA'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"maximum load current Imax1 = 510 mA\n",
"maximum load current Imax2 = 565 mA\n",
"maximum load current Imax4 = 593 mA\n"
]
}
],
"prompt_number": 8
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 24-6, Page 956"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"VNL=9.91 #given VNL(V)\n",
"VFL=9.81 #given VFL(V)\n",
"VHL=9.94 #given VHL(V) \n",
"VLL=9.79 #given VLL(V)\n",
"\n",
"LoR=(VNL-VFL)*100/VFL #Load regulation(%)\n",
"LiR=(VHL-VLL)*100/VLL #Line regulation(%)\n",
"\n",
"print 'Load regulation = ',round(LoR,2),'%'\n",
"print 'Line regulation = ',round(LiR,2),'%'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Load regulation = 1.02 %\n",
"Line regulation = 1.53 %\n"
]
}
],
"prompt_number": 4
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 24-7, Page 962"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"RL=40.0 #given load resistance RL(Ohm)\n",
"VBE=0.7 #base-emitter voltage drop(V) \n",
"Vz=6.2 #voltage across diode(V)\n",
"R1=3.0 #base input resistance(KOhm)\n",
"R2=1.0 #base input resistance(KOhm)\n",
"Vin=15 #input voltage(V)\n",
"\n",
"Vout=(Vz+VBE)*(R1+R2)/R1 #output voltage(V)\n",
"IC=Vout/RL #transistor current(A)\n",
"PD=(Vin-Vout)*IC #power dissipation(W)\n",
"\n",
"print 'Output voltage Vout = ',Vout,'V'\n",
"print 'transistor current = load current = IC = ',IC*1000,'mA'\n",
"print 'Power dissipation PD = ',PD,'W'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Output voltage Vout = 9.2 V\n",
"transistor current = load current = IC = "
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
"230.0 mA\n",
"Power dissipation PD = 1.334 W\n"
]
}
],
"prompt_number": 11
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 24-8, Page 963"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"Vout=9.2 #output voltage(V)\n",
"IL=230 #load current(mA)\n",
"Vin=15.0 #input voltage(V)\n",
"\n",
"Pout=Vout*IL/1000 #output power(W)\n",
"Pin=Vin*IL/1000 #input power(W)\n",
"eff1=Pout/Pin #efficiency\n",
"eff2=Vout/Vin #efficiency\n",
"\n",
"print 'input power Pin = ',Pin,'W'\n",
"print 'Output power Pout = ',Pout,'W'\n",
"print 'Effifciency 1= ',round((eff1*100),2),'%'\n",
"print 'Effifciency 2= ',round((eff2*100),2),'%'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"input power Pin = 3.45 W\n",
"Output power Pout = 2.116 W\n",
"Effifciency 1= 61.33 %\n",
"Effifciency 2= 61.33 %\n"
]
}
],
"prompt_number": 5
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 24-9, Page 963"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"RL=4.0 #given load resistance RL(Ohm)\n",
"Vz=5.6 #voltage across diode(V)\n",
"R1=2.7 #base input resistance(KOhm)\n",
"R2=2.2 #base input resistance(KOhm)\n",
"Vin=15 #input voltage(V)\n",
"B=100 #current gain\n",
"\n",
"Vout=Vz*(R1+R2)/R1 #output voltage(V)\n",
"IL=Vout/RL #load current(A)\n",
"IB=IL/B #base current(A)\n",
"\n",
"print 'Output voltage Vout = ',round(Vout,2),'V'\n",
"print 'Load current IL = ',round(IL,2),'A'\n",
"print 'base current IB = ',round((IB*1000),2),'mA'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Output voltage Vout = 10.16 V\n",
"Load current IL = 2.54 A\n",
"base current IB = 25.41 mA\n"
]
}
],
"prompt_number": 6
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 24-10, Page 964"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"VNL=10.16 #given VNL(V)\n",
"VFL=10.15 #given VFL(V)\n",
"VHL=10.16 #given VHL(V) \n",
"VLL=10.07 #given VLL(V)\n",
"\n",
"LoR=(VNL-VFL)*100/VFL #Load regulation(%)\n",
"LiR=(VHL-VLL)*100/VLL #Line regulation(%)\n",
"\n",
"print 'Load regulation = ',round(LoR,3),'%'\n",
"print 'Line regulation = ',round(LiR,2),'%'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Load regulation = 0.099 %\n",
"Line regulation = 0.89 %\n"
]
}
],
"prompt_number": 9
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 24-11, Page 965"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"RL=3.0 #given load resistance RL(Ohm)\n",
"Vz=4.7 #voltage across diode(V)\n",
"R11=1750 #base input resistance with max. potentiometer(Ohm)\n",
"R12=750 #base input resistance with min. potentiometer(Ohm)\n",
"R2=750 #base input resistance(Ohm)\n",
"Vin=22.5 #max. input voltage(V)\n",
"B=100 #current gain\n",
"Rs=820 #input side resistance(Ohm)\n",
"Vcl=0.6 #voltage across current limiting resistor(V)\n",
"Vcs=0.7 #voltage across current sensing resistor(V)\n",
"Vo=12.5 #regulated voltage given(V)\n",
"\n",
"Iz=(Vin-Vz)/Rs #max. zener current(A)\n",
"Vout1=Vz*(R11+R2)/R11 #min. regulated output voltage(V)\n",
"Vout2=Vz*(R12+R2)/R12 #max. regulated output voltage(V)\n",
"IL=Vcl/RL #load current(A)\n",
"RL1=Vo/IL #load resistance(Ohm)\n",
"ISL=Vcs/RL #shorted-load current(A)\n",
"\n",
"print 'maximum zener current Iz = ',round((Iz*1000),2),'mA'\n",
"print 'Load current IL = ',IL*1000,'mA'\n",
"print 'load resistance RL = ',RL1,'Ohm'\n",
"print 'shorted-load current ISL = ',round((ISL*1000),2),'mA'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"maximum zener current Iz = 21.71 mA\n",
"Load current IL = 200.0 mA\n",
"load resistance RL = 62.5 Ohm\n",
"shorted-load current ISL = 233.33 mA\n"
]
}
],
"prompt_number": 10
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 24-12, Page 971"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"Vout=12.0 #regulated output voltage(V)\n",
"RL=100.0 #given load resistance RL(Ohm)\n",
"\n",
"C=1000*10**-6 #given capacitance(F)\n",
"f=120 #frequency(Hz)\n",
"RR_dB=72.0 #ripple rejection(dB)\n",
"\n",
"IL=Vout/RL #load current(A)\n",
"VRi=IL/(f*C) #peak to peak input ripple (V)\n",
"RR=10**(RR_dB/20) #ripple rejection\n",
"VRo=VRi/RR #peak to peak output ripple (V)\n",
"\n",
"print 'Load current IL = ',IL*1000,'mA'\n",
"print 'peak to peak input ripple = ',VRi,'V'\n",
"print 'peak to peak output ripple = ',round((VRo*1000),2),'mV'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Load current IL = 120.0 mA\n",
"peak to peak input ripple = 1.0 V\n",
"peak to peak output ripple = 0.25 mV\n"
]
}
],
"prompt_number": 11
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 24-13, Page 972"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"R1=2.0 #given resistance(KOhm)\n",
"R2=22.0 #given resistance(KOhm)\n",
"R21=46.0 #given resistance increased(KOhm)\n",
"\n",
"Vout1=1.25*(R1+R2)/R1 #output voltage(V)\n",
"Vout2=1.25*(R1+R21)/R1 #output voltage with increased R2(V)\n",
"\n",
"print 'Output voltage Vout1 = ',Vout1,'V'\n",
"print 'output voltage with increased R2, Vout2 = ',Vout2,'V' "
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Output voltage Vout1 = 15.0 V\n",
"output voltage with increased R2, Vout2 = 30.0 V\n"
]
}
],
"prompt_number": 26
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 24-14, Page 972"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"Vout=5.0 #output voltage(V)\n",
"Vin_min=7.5 #min. input voltage(V)\n",
"Vin_max=20.0 #max. input voltage(V)\n",
"\n",
"eff_max=Vout/Vin_min #maximum efficiency\n",
"eff_min=Vout/Vin_max #minimum efficiency\n",
"\n",
"print 'Minimum Effifciency = ',eff_min*100,'%'\n",
"print 'Maximum Effifciency = ',round((eff_max*100),2),'%'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Minimum Effifciency = 25.0 %\n",
"Maximum Effifciency = 66.67 %\n"
]
}
],
"prompt_number": 12
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 24-15, Page 984"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"R1=2.21 #given resistance(KOhm)\n",
"R2=2.8 #given resistance(KOhm)\n",
"R21=46.0 #given resistance increased(KOhm)\n",
"VREF=2.21 #Reference voltage(V)\n",
"\n",
"Vout=VREF*(R1+R2)/R1 #output voltage(V)\n",
"\n",
"print 'Output voltage Vout = ',Vout,'V'\n",
"print 'Input voltage should be 2V greater than output voltage So, Vin = 7 V'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Output voltage Vout = 5.01 V\n",
"Input voltage should be 2V greater than output voltage So, Vin = 7 V\n"
]
}
],
"prompt_number": 31
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 24-16, Page 984"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"R1=1 #given resistance(KOhm)\n",
"R2=5.79 #given resistance(KOhm)\n",
"VREF=2.21 #Reference voltage(V)\n",
"\n",
"Vout=VREF*(R1+R2)/R1 #output voltage(V)\n",
"\n",
"print 'Output voltage Vout = ',round(Vout,2),'V'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Output voltage Vout = 15.01 V\n"
]
}
],
"prompt_number": 13
},
{
"cell_type": "code",
"collapsed": false,
"input": [],
"language": "python",
"metadata": {},
"outputs": []
}
],
"metadata": {}
}
]
}