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Diodes are not perfect devices. When current flows through a diode, it offers some resistance. And the resistive characteristic will cause the generation of thermal energy - which is heat. Diodes come in different "flavors" or types, and they also have ratings. These ratings include the amount of current they are capable of carrying, the reverse voltage they can withstand, and some other characteristics. In the case of zener diodes, they have a current rating, a breakdown voltage rating, and a wattage rating that speaks to the amount of heat the package can dissipate. If we look at something like a rectifier diode rated at, say, a hundred amps, it will be stud mounted. Additionally, there will be specifications regarding the size of the heat sink onto which it is fastened. Again, these diodes will generate heat because their forward resistance, while low, is not zero. Even at a fraction of an ohm of resistance, at a hundred amps, there will be some heat generated when the diode conducts. The devices will need to be bolted up to a pretty heavy plate of aluminum to give the heat some place to go.
What else can I help you with?
What are the advantages of Trapatt diodes over Impatt diodes?
Advantages of Trapatt:• higher efficiency than impatt• very low power dissipationAdvantages of Impatt:• This microwave diode has high power capability compare to other diodes.• Output is reliable compare to other diodes.
What are the classifications of diodes?
a diode is a device that alows current to flow in one direction you have power diodes which are used in rectification processes and high current operations but the two main families of diodes are solid state diodes or valve operated diodes.
What is diode peak current in 12 volt power supply?
A: Diodes peaks current can exceed the forward steady sate current by a big factor for a short time without destroying itself. It will destroy itself if the power dissipation is exceeded. The answer to your question is the peak voltage has absolutely nothing to do with a 12 volts power supply or any other voltage power supply it has to do with the diode itself
Because solid state diodes have no filament?
require less operating power
Why at low frequency current and power dissipation is high?
we know that frequency and time period are inversely proportional so as frequency decreases time period increases resulting in larger current flow thus increasing the dissipation.
Explain why diodes melt?
Diodes, like many other electronic/electrical components, will melt if the temperature is high enough. This would occur if the power dissipation were too high because the current was too high.
What are the different types of power dissipation?
static power dissipation dynamic power dissipation short circuit power dissipation
What is the difference between power consumption and power dissipation?
A: POWER consumption is total power usage power dissipation is wasted power in the form of heat, IR drop and so on.
What is the power dissipation for TTL?
power dissipation of a logic circuit is usually defined as the supply power required for the gate to operate with a 50% duty cycle at a specific frequency.
How do you explain the MOSFET power dissipation?
It will make more sense if you first study the construction of MOSFET. It has three terminals, Gate (G), Source (S), and Drain (D). G is insulated from the S and D. Between S and D is a variable resistor, whose resistance depends on the voltage applied across G and S. Since SD is basically a resistor, you have power dissipation when a voltage is applied across S and D. Power dissipation = Vds * Ids.
What is the key difference between old computers and the present day computers?
vacuum tubes, large sized, high power dissipation, high voltagestransistors, medium sized, medium power dissipation, low voltagesintegrated circuits, small size, medium power dissipation, low voltagesmicroprocessors, very small size, low power dissipation, low voltages
Can power dissipation be prevented?
A: All devices have some kind of power dissipation. That is because some quiescent current must flow to keep them alive or functional
What are the specification of diode?
The most important specifications of a diode are:maximum forward currentpeak inverse voltage (aka maximum reverse voltage)reverse leakage currentreverse turnoff time (very important in high speed switching diodes)maximum power dissipation (only given for power rectifier diodes)forward bias knee voltageparasitic capacitance (only important in high frequency applications)All of this and more can be found in the datasheet for the diode.
Which of the technology results in least power dissipation?
CMOS
Which logic family has lowest power dissipation?
cmos
What is the formula to calculate power dissipation?
P=ir2
Difference between power diode and simple diode?
Major Differences1- DesignSimple diodes consist of a simple PN junction. They are smaller in size and lighter in weight, while power diodes are in modified form and they are larger and heavier normally. Power diodes are usually available in metal form.2- Voltage RatingSimple diodes are used in normal low power components so they have a relatively low voltage ratings as compared to power diodes. Power diodes can have very high voltage ratings usually in thousands of volts.3- Current RatingPower diodes have a high hand in Current ratings over normal diodes , that can be in several hundred amperes.4-TemperatureMajor probelm in handling high power applications is the generation of heat and temperature. Power diodes have the accessiblity of operation at higher temperature whereas normal diodes do not need this feature in high priority.5- CostPower Diodes are costly as compared to the simple diodes due to the additional components and features.
