BD245-S

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BD245-S Application Field and Working Principle

The BD245-S is a single bipolar junction transistor (BJT) which is designed for use in circuit applications such as power supplies, high power amplifiers and drivers, and motor control circuits. It is capable of operating at high current levels and is rated at up to 15A. It is designed to be used in series connection with other components in order to provide the desired voltage or current output levels.

Features of the BD245-S

• Low power loss
• High current capacity
• Very low VCE(sat) and VBE(on)
• High switching frequency

Applications

• High power amplifier and drivers
• Motor control circuits
• Power supplies
• Switching circuits

Working Principle

The working principle of the BD245-S is using the biasing of the two transistors connected in a series that is necessary to operate the transistor. The emitter of the first transistor is connected to the base of the second transistor. The collector of the first transistor and the emitter of the second form the output of the transistor. The base of the first transistor is connected to the base of the second transistor, and the collector of the second transistor forms the input of the transistor. The two transistors are referred to as the output and input.

When current is applied to the base of the first transistor, it causes a voltage drop across it, which in turn causes the current to flow from the collector of the first transistor to the emitter of the second transistor. This current then flows through the next transistor and can be used to control the output voltage or current of the transistor.

As long as the current applied to the base of the first transistor remains constant, the output voltage or current of the transistor will also remain constant. When the applied current is increased, the output voltage or current of the transistor will also increase. This allows for precise control of the output voltage or current of the transistor, which is essential in circuit applications such as power supplies and motor control circuits.

Conclusion

The BD245-S is a single bipolar junction transistor (BJT) designed for use in circuit applications such as power supplies, high power amplifiers and drivers, and motor control circuits. It is capable of operating at very high current levels and is rated at up to 15A. The working principle is based on the biasing of the two transistors connected in a series and the output voltage or current of the transistor can be precisely controlled by adjusting the applied current.

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