Table of Contents
What would happen if you supply a current over the maximum rating of a transistor?
If you supply a current over the maximum rating, the transistor might blow up. The series resistor between our control source and the base limits current into the base. The base-emitter node can get its happy voltage drop of 0.6V, and the resistor can drop the remaining voltage.
What is the maximum power dissipated in the transistor?
100mW
The maximum power dissipation of a transistor is 100mW.
What is maximum rating of transistor?
For transistors, the maximum ratings are defined based on the absolute maximum rating approach. The absolute maximum ratings are the highest values that must not be exceeded during operation even instantaneously. When two or more ratings are specified, two ratings can not be applied to the transistor at the same time.
What is transistor power rating?
Power Rating is the maximum amount of power that a device can dissipate in a typical operating environment. BJT Power Rating = Collector Emitter Voltage * Collector Current + Base Emitter Voltage * Base Current.
What is the effect of increasing the base transistor?
It is an exponential relationship that is described by the Ebers-Moll equations. An increase in this voltage results in increased currents in both the base and the collector, and indeed, an increase in base current causes an increase in B-E voltage.
Why there is a maximum limit for the collector supply voltage for a transistor?
Because there is generally a load resistor in series with the collector. Current through the resistor increases, voltage across the resistor increases. Which leaves less voltage for the transistor.
What is power dissipation in BJT?
Power dissipation When a transistor conducts current between collector and emitter, it also drops voltage between those two points. At any given time, the power dissipated by a transistor is equal to the product of collector current and collector-emitter voltage.
How can the power rating of a transistor be increased?
The power rating of a transistor can be increased by If the temperature increases, the power rating of a transistor decreases. The data sheet of a transistor either lists a de rating factor or shows a graph of the power rating versus temperature.
How do transistors increase current?
During the negative alternation of the input signal, the transistor current increases because the input voltage aids the forward bias. The output for the negative alternation of the input is a positive alternation of voltage that is larger than the input but has the same sine wave characteristics.
What is maximum collector current in transistor?
The maximum collector current is normally rated to be the current at which the DC current gain (hFE) falls to 50\% of its maximum value. In the case of a transistor by itself, the maximum base current is normally rated to be 1 / 3 the collector current.
What does BJT mean in electronics?
Transistors: Bipolar Junction Transistors (BJT) General configuration and definitions The transistor is the main building block “element” of electronics. It is a semiconductor device and it comes in two general types: the Bipolar Junction Transistor (BJT) and the Field Effect Transistor (FET).
What are the maximum junction voltages for BJT transistors?
On the datasheet for a BJT, there are normally 3 maximum junction voltages specifications that are given: VCEO, VCBO, and VEBO. In this article, we will explain what the these ratings for VCEO, VCBO, and VEBO are and why they have value for circuit designers using these transistors.
What is the breakdown voltage rating of a transistor?
The maximum allowable voltage that a junction of a transistor can withstand is called the breakdown voltage rating. The VCEO rating which you see in a transistor datasheet is the breakdown voltage rating for the collector-emitter junction of the transistor.
What is the V CEO rating of a transistor?
The V CEO rating which you see in a transistor datasheet is the breakdown voltage rating for the collector-emitter junction of the transistor. Applying a voltage to the collector-emitter junction exceeding this rating can destroy the transistor.