TB0900H-13

Thyristors are mainly used in electronic power management applications. The TB0900H-13 is a type of thyristor, and it is the most widely used thyristor available today. This article will discuss the application field and working principle of the TB0900H-13.

Application Field

The TB0900H-13 can be used for a wide variety of applications. It is commonly used in electronic motor control and high-current motor drives. The device is also suitable for use in high-frequency applications such as digital drive control, where it can accurately maintain a specific voltage and current rate. Additionally, the TB0900H-13 can be used in applications requiring rapid changes in current flow, such as battery chargers, solenoids, and current level shifting.

The TB0900H-13 is also used in various light-dimming circuits. It has a built-in soft-start feature to reduce voltage stress and minimize inrush currents, making it ideal for use in fluorescent and other light-dimming systems. It is also suitable for use in lighting dimmer and lighting ballast applications.

Working Principle

The TB0900H-13 is a three-terminal thyristor that operates based on the diode-capacitor-triac circuit. It has three terminals—an anode, cathode, and gate. The anode and cathode are connected to the device’s main current flow path. The gate is connected to the control circuit, which is used to control the timing of the thyristor’s conduction.

When a small current is applied to the gate from the control circuit, a controlling voltage is established between the gate and cathode. This voltage enables the device to begin conducting and allows current to flow through the anode and cathode. Depending on the characteristics of the control circuit, the thyristor will stay on until the control current is removed.

The TB0900H-13 is also equipped with an over-voltage protection circuit, which prevents the device from exceeding its maximum allowable voltage rating. This protection circuit also helps to reduce power losses due to stress on the device due to excessive voltage.

Conclusion

The TB0900H-13 is a three-terminal thyristor with a wide range of applications. It is used in various electronic motor control and high-current motor drives, digital drive control, and light-dimming circuits. The TB0900H-13 operates based on the diode-capacitor-triac circuit and is equipped with an over-voltage protection circuit.