Contents
What is primary breakdown in BJT?
BV is the collector base breakdown voltage when the emitter is open circuited. The primary breakdown shown takes place because of avalanche breakdown of collector base junction. Large power dissipation normally leads to primary breakdown. The second breakdown shown is due to localized thermal runaway.
What is second breakdown in BJT?
Secondary breakdown is a failure mode in bipolar transistors in which negative resistance (current concentration) occurs under high-voltage and high-current conditions. Current concentration causes local heating, resulting in a small hotspot.
What are the maximum junction voltages for a BJT?
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 of a transistor?
The V EBO rating which you see in a transistor datasheet is the breakdown voltage rating for the emitter-base junction of the transistor. Again, this voltage must be checked on the transistor’s datasheet to make sure it is not exceeded.
Which is the most important characteristic of a BJT?
In order to distinguish these regimes we have to look at the i-v characteristics of the device. The most important characteristic of the BJT is the plot of the collector current, IC, versus the collector-emitter voltage, VCE, for various values of the base current, IBas shown on the circuit of Figure 6.
What is the VCBO rating of a transistor?
The VCBO Rating of a Transistor is the maximum allowable voltage that the collector-base junction of a transistor can handle before it becomes damaged or destroyed. The VCBO rating which you see in a transistor datasheet is the breakdown voltage rating for the collector-base junction of the transistor.