BTA316-800C/L05Q

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Thyristors - TRIACs are three-terminal semiconductor devices that are used for controlling current in a power circuit. The BTA316-800C/L05Q is a type of thyristor, specifically a TRIAC, which has two thyristor-like characteristics that make it especially suited for a wide range of applications. In this article, we will explore the application field and working principle of the BTA316-800C/L05Q TRIAC.

Application Field

The BTA316-800C/L05Q is designed for the control of switching power supplies and lamp ballasts. It has a maximum voltage of 800V and a maximum current of 10A and is designed to be used in switching applications where load and environmental conditions are relatively stringent. As such, this device is especially well-suited for use in applications where power dissipation needs to be minimized but reliable operation is still necessary. This includes mobile telecoms, digital TV and household appliances.

The BTA316-800C/L05Q has a number of advantages over other TRIACs including low on-state resistance, very low switching losses and high surge and pulse current ratings. These features allow the device to be used in compact, thermally efficient power conversion designs and help to conserve energy.

Working Principle

The BTA316-800C/L05Q is a three-terminal device comprising the main terminal (MT), the gate (G) and the cathode (C), connected to the output of a power circuit. The current passing through the MT terminal is controlled by the gate-initiated triggering of a main thyristor-like conduction mechanism that is triggered by a voltage applied to the G terminal.

When the G terminal is cut-off, the BTA316-800C/L05Q remains in the blocking state and no current passes through the MT terminal. When a positive gate current is applied, the main thyristor is triggered and the device enters into the on-state, thus allowing current to pass through the MT terminal.

The gate current must be maintained during the on-state in order to keep the main thyristor triggered, and it defines the current-carrying capacity as well as the maximum turn-off time. Once the gate current is cut-off, the device will automatically return to its blocking state. This can be done by using a zero-firing or a fired zero-voltage control technique.

The BTA316-800C/L05Q is designed to withstand high surge and pulse currents and, because of its low on-state resistance, it is also suitable for applications in high-side loads such as light dimmers and motor speed regulation. It is also capable of being switched with an AC waveform.

Conclusion

The BTA316-800C/L05Q is a three-terminal TRIAC that is designed to be used in switching power supplies and lamp ballasts. Its main advantages include low on-state resistance, very low switching losses, high surge and pulse current ratings, and the ability to be switched with an AC waveform. It is especially suited for applications where power dissipation needs to be minimized but reliable operation is still required.

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