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-{
- "metadata": {
- "name": "",
- "signature": "sha256:dca2eb0dc5462992ceade27e53e297f6073a62b5b813c53a51758356342ce482"
- },
- "nbformat": 3,
- "nbformat_minor": 0,
- "worksheets": [
- {
- "cells": [
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "<h1>Chapter 17: Voltage Regulators<h1>"
- ]
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "<h3>Example 17.1, Page Number:552 <h3>"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "%pylab inline"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "\n",
- "Welcome to pylab, a matplotlib-based Python environment [backend: module://IPython.zmq.pylab.backend_inline].\n",
- "For more information, type 'help(pylab)'."
- ]
- }
- ],
- "prompt_number": 1
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "\n",
- "#variable declaration\n",
- "Del_V_out=0.25;\n",
- "V_out=15;\n",
- "Del_V_in=5; #All voltages in Volts\n",
- "\n",
- "#Calculations\n",
- "line_regulation=((Del_V_out/V_out)/Del_V_in)*100;\n",
- "\n",
- "#Result\n",
- "print('line regulation in %%V is %f' %line_regulation)"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "line regulation in %V is 0.333333"
- ]
- }
- ],
- "prompt_number": 2
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "<h3>Example 17.2, Page Number: 553<h3>"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "\n",
- "# Variable Declaration\n",
- "V_NL=12.0; #No load output voltage in Volts\n",
- "V_FL=11.9; #Full load output voltage in Volts\n",
- "I_F=10.0; #Full load current in milli-Amperes\n",
- "\n",
- "#Calculations\n",
- "load_regulation=((V_NL-V_FL)/V_FL)*100;\n",
- "load_reg=load_regulation/I_F;\n",
- "\n",
- "#Result\n",
- "print('load regulation as percentage change from no load to full load = %f'%load_regulation)\n",
- "print('\\nload regulation as percentage change per milliampere = %f' %load_reg)"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "load regulation as percentage change from no load to full load = 0.840336\n",
- "\n",
- "load regulation as percentage change per milliampere = 0.084034"
- ]
- }
- ],
- "prompt_number": 3
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "<h3>Example 17.3, Page Number: 556<h3>"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "\n",
- "\n",
- "V_REF=5.1 #Zener voltage in volts\n",
- "R2=10*10**3;\n",
- "R3=10*10**3; #resistances in ohm\n",
- "V_out=(1+(R2/R3))*V_REF;\n",
- "print('output voltage in volts = %.1f'%V_out)"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "output voltage in volts = 10.2"
- ]
- }
- ],
- "prompt_number": 4
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "<h3>Example 17.4, Page Number: 557<h3>"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "\n",
- "R4=1; #Resistance in Ohms\n",
- "I_L_max=0.7/R4;\n",
- "print('maximum current provided to load(in amperes) = %.1f'%I_L_max)"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "maximum current provided to load(in amperes) = 0.7"
- ]
- }
- ],
- "prompt_number": 5
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "<h3>Example 17.5, Page Number: 560<h3>"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "\n",
- "V_IN=12.5; #maximum input voltage in volts\n",
- "R1=22; #In Ohms\n",
- "\n",
- "V_OUT=0;\n",
- "V_R1=V_IN-V_OUT; #Voltage across R1\n",
- "P_R1=(V_R1*V_R1)/R1; #maximum power dissipated by R1\n",
- "print('maximum power dissipated by R1 in WATTS = %f'%P_R1)"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "maximum power dissipated by R1 in WATTS = 7.102273"
- ]
- }
- ],
- "prompt_number": 6
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "<h3>Example 17.6, Page Number: 569<h3>"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "\n",
- "print('SAME AS EX-2.8 in CHAPTER-2')"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "SAME AS EX-2.8 in CHAPTER-2"
- ]
- }
- ],
- "prompt_number": 7
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "<h3>Example 17.7, Page Number: 572<h3>"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "\n",
- "I_max=700*10**-3; #in Amperes\n",
- "R_ext=0.7/I_max;\n",
- "print('value of resistor in Ohms for which max current is 700mA = %f'%R_ext)"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "value of resistor in Ohms for which max current is 700mA = 1.000000"
- ]
- }
- ],
- "prompt_number": 8
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "<h3>Example 17.8, Page Number: 572<h3>"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "\n",
- "V_OUT=24.0; #Output voltage in Volts\n",
- "R_L=10.0; #Load resistance in Ohms\n",
- "V_IN=30.0; #Input voltage in Volts\n",
- "I_max=700.0*10**-3; #maximum interal current in Amperes\n",
- "I_L=V_OUT/R_L; #load current in amperes\n",
- "I_ext=I_L-I_max; #current through the external pass transistor in Amperes\n",
- "P_ext_Qext=I_ext*(V_IN-V_OUT); #power dissipated\n",
- "print('power dissiated(in WATTS) by the external pass transistor = %.1f'%P_ext_Qext)\n",
- "print('\\nFor safety purpose, we choose a power transistor with rating more than this, say 15W')"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "power dissiated(in WATTS) by the external pass transistor = 10.2\n",
- "\n",
- "For safety purpose, we choose a power transistor with rating more than this, say 15W"
- ]
- }
- ],
- "prompt_number": 9
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "<h3>Example 17.9, Page Number: 574<h3>"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "\n",
- "V_out=5.0; #7805 gives output voltage of 5V\n",
- "I_L=1.0; #constant current of 1A\n",
- "R1=V_out/I_L;\n",
- "print('The value of current-setting resistor in ohms = %d'%R1)"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "The value of current-setting resistor in ohms = 5"
- ]
- }
- ],
- "prompt_number": 10
- }
- ],
- "metadata": {}
- }
- ]
-} \ No newline at end of file
generated by cgit (git 2.34.1) at 2025-01-09 13:08:02 +0000