4. How might the time constant for the circuit of a mobile device's power supply be...
4. How might the time constant for the circuit of a mobile device's power supply be estimated if a light emitting diode fades out when the device is shutdown or has its power source removed?
Homework Answers
Time constant for a capacitor is the time in which the capacitor get charged 63% of the maximum charge on the capacitor.
The time constant can be calculated by RC where C is the capacitance of the capacitor and R is the equivalent resistance across the capacitor when battery is replaced with its internal resistance.
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4. How might the time constant for the circuit of a
mobile device's power supply be...
Question 4. (a) A full-wave bridge rectifier power supply is powered from the secondary of a...
Question 4. (a) A full-wave bridge rectifier power supply is powered from the secondary of a transformer which has a rms secondary voltage of 15.6V. The primary of the transformer is connected to a 50Hz, 230VRMS power supply. A 2700uF filter capacitor is used. A current of 1.5 Amp is drawn from the supply. (i) Sketch a schematic diagram of the setup. (ii) Calculate the mean de output voltage. Assume each power diode has a forward voltage drop of 1...
5. Your laboratory kit contains the following equipment: . GPS 3303 DC Power Supply with cables; a breadboard and connecting wires; ·A dual-in-line package of four SPST switches and one light emittin...
5. Your laboratory kit contains the following equipment: . GPS 3303 DC Power Supply with cables; a breadboard and connecting wires; ·A dual-in-line package of four SPST switches and one light emitting diode (LED) A current of at least 5 mA is required to adequately illuminate the diode, and the diode current should not exceed 100 mA. . A supply of 4.7 kΩ, 560 Ω and 1 Ω resistors. You are holding a logic chip that is believed to be...
QUESTION 5 (15 points) a. You have a power supply which is a full-wave rectifier with a capacitor filter. It operates f...
QUESTION 5 (15 points) a. You have a power supply which is a full-wave rectifier with a capacitor filter. It operates from the mains and provides an output of Voc-20 V with 20% ripple, when the load current is 2 A Calculate the maximum and minimum values of the output waveform of this power supply. b. Now you will design a series voltage regulator between the power supply described in part (a) and an electronic device operating at 12 VDC...
In this procedure, you get to write and execute an experimental procedure to find a Thévenin...
In this procedure, you get to write and execute an experimental procedure to find a Thévenin equivalent model for a Light Emitting Diode (LED) The simplest model for a diode is as a switch that is on (short circuit) when current tries to flow in the direction of the arrow in the diode symbol, and off (open circuit) when the current ties to flow in the direction opposite to the arrow. This model doesn't work all that well for an...
b. Does the resistance of the electric light bulb increase, decrease or remain constant as the...
b. Does the resistance of the electric light bulb increase, decrease or remain constant as the power, I*V, is increased? Consult your data table. Does the temperature of the light bulb filament increase, decrease or remain constant as c. the power, IV, to the bulb is increased? (Hint: Associate a higher electrical power with 3. Does the diode conduct symmetrically when the current flows in the forward (positive 4. Why is it that we always connect a voltmeter in parallel...
Please show step for step and, all equations used. Thank you. 1) For the power supply circuit: 120v Dc. 6Oh time values on your sketch E. hat is the DC load Current? 7 C. What is the average curre...
Please show step for step and, all equations used. Thank
you.
1) For the power supply circuit: 120v Dc. 6Oh time values on your sketch E. hat is the DC load Current? 7 C. What is the average current in each diode? I = D. what is th peak current in each uld be reqLlired to redLICe the E. What minimLm va l Lle.Pf capac i tor 120v 7 1 For the power suipply circuit: ツー time values on Your...
1. Is the current through the power supply and each bulb (in Table 2) increasing or...
1. Is the current through the power supply and each bulb (in
Table 2) increasing or decreasing with increasing the number of
bulbs in Fig. 5 (a) to Fig. 5 (d)? Why
2. Is there any correlation between the current through each
bulb and observed bulbs' brightness? Why?
3. Are the lights at your home connected in parallel? Why?
4. The maximum output current from the DC power supply #1 is 2
A. What is the maximum number of light...
In this part of the term paper, design a single-phase switch-mode DC power supply with a forward ...
In this part of the term paper, design a single-phase switch-mode DC power supply with a forward converter. Provide answers to the questions below Please combine the single-phase full-wave rectifier from part two of your term paper with a forward converter to produce a switch-mode DC power supply, as shown below. The output of the bridge rectifier serves as input to the forward converter L1 Np: N BH621BH62 D, V1 Load C1 100p 45 Vrms D3 BH62 18H62 D4 Control...
5.29 A power supply is an instrument or circuit that produces a steady voltage similar to...
5.29 A power supply is an instrument or circuit that produces a steady voltage similar to a battery. A good power supply produces an almost constant voltage and has almost zero Thevenin resistance. In the power supply of Fig. 5-28a there is an adjustment for changing the output voltage from 10 to 30 V. This being the case, what is the minimum load power with a 100-0 load? The maximum load power? 5.30 What current rate should the fuse of...
As a power electronics engineer, you have been contracted by a mobile phone manufacturing company, STK...
As a power electronics engineer, you have been contracted by a mobile phone manufacturing company, STK Mobile, to design a converter to supply power to the microprocessors for the mobile phones. Your task is to design a converter to meet the following specifications: 1. the microprocessors operate effectively at 8 V and 1 A. 2. continuous current conduction mode at all the time. 3. peak-to-peak inductor current should not be more than 30% of its average value at all operating...
Question 4. (a) A full-wave bridge rectifier power supply is powered from the secondary of a transformer which has a rms secondary voltage of 15.6V. The primary of the transformer is connected to a 50Hz, 230VRMS power supply. A 2700uF filter capacitor is used. A current of 1.5 Amp is drawn from the supply. (i) Sketch a schematic diagram of the setup. (ii) Calculate the mean de output voltage. Assume each power diode has a forward voltage drop of 1...
5. Your laboratory kit contains the following equipment: . GPS 3303 DC Power Supply with cables; a breadboard and connecting wires; ·A dual-in-line package of four SPST switches and one light emitting diode (LED) A current of at least 5 mA is required to adequately illuminate the diode, and the diode current should not exceed 100 mA. . A supply of 4.7 kΩ, 560 Ω and 1 Ω resistors. You are holding a logic chip that is believed to be...
QUESTION 5 (15 points) a. You have a power supply which is a full-wave rectifier with a capacitor filter. It operates from the mains and provides an output of Voc-20 V with 20% ripple, when the load current is 2 A Calculate the maximum and minimum values of the output waveform of this power supply. b. Now you will design a series voltage regulator between the power supply described in part (a) and an electronic device operating at 12 VDC...
In this procedure, you get to write and execute an experimental procedure to find a Thévenin equivalent model for a Light Emitting Diode (LED) The simplest model for a diode is as a switch that is on (short circuit) when current tries to flow in the direction of the arrow in the diode symbol, and off (open circuit) when the current ties to flow in the direction opposite to the arrow. This model doesn't work all that well for an...
b. Does the resistance of the electric light bulb increase, decrease or remain constant as the power, I*V, is increased? Consult your data table. Does the temperature of the light bulb filament increase, decrease or remain constant as c. the power, IV, to the bulb is increased? (Hint: Associate a higher electrical power with 3. Does the diode conduct symmetrically when the current flows in the forward (positive 4. Why is it that we always connect a voltmeter in parallel...
Please show step for step and, all equations used. Thank
you.
1) For the power supply circuit: 120v Dc. 6Oh time values on your sketch E. hat is the DC load Current? 7 C. What is the average current in each diode? I = D. what is th peak current in each uld be reqLlired to redLICe the E. What minimLm va l Lle.Pf capac i tor 120v 7 1 For the power suipply circuit: ツー time values on Your...
1. Is the current through the power supply and each bulb (in
Table 2) increasing or decreasing with increasing the number of
bulbs in Fig. 5 (a) to Fig. 5 (d)? Why
2. Is there any correlation between the current through each
bulb and observed bulbs' brightness? Why?
3. Are the lights at your home connected in parallel? Why?
4. The maximum output current from the DC power supply #1 is 2
A. What is the maximum number of light...
In this part of the term paper, design a single-phase switch-mode DC power supply with a forward converter. Provide answers to the questions below Please combine the single-phase full-wave rectifier from part two of your term paper with a forward converter to produce a switch-mode DC power supply, as shown below. The output of the bridge rectifier serves as input to the forward converter L1 Np: N BH621BH62 D, V1 Load C1 100p 45 Vrms D3 BH62 18H62 D4 Control...
5.29 A power supply is an instrument or circuit that produces a steady voltage similar to a battery. A good power supply produces an almost constant voltage and has almost zero Thevenin resistance. In the power supply of Fig. 5-28a there is an adjustment for changing the output voltage from 10 to 30 V. This being the case, what is the minimum load power with a 100-0 load? The maximum load power? 5.30 What current rate should the fuse of...
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