L2004D5TP

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Thyristors - TRIACs

L2004D5TP application field and working principle

L2004D5TP is a high-performance, low-power consumption TRIAC, belonging to the family of thyristors. It can be used in AC power control applications, such as domestic appliances and lighting control.

The TRIAC is the three terminal four-layer device composed of two PN junctions and two SCRs, which is reverse conductive at the first and third region. The two SCRs are set in two anti-parallel directions, enabling the device to control the current flowing in both directions.The three terminals are Gate, Anode, and Cathode. For the L2004D5TP, the Gate terminal has a voltage limitation of +/- 10V and it is triggered by the logic signals from the system. The operational voltage range from 11V to 400V AC, and the special model can support a voltage range up to 1000V. The Ramp-up and Ramp-down current time can be set for each application, which is typically 200μs to 2000μs.

The working principle of L2004D5TP is quite simple. When the Gate voltage is triggered, the Gate terminal injects a small amount of electrons or holes. This injection makes the gate-cathode junction forward biased, which starts the conduction of the TRIAC device. The conduction between Anode and Cathode is proportional with the current flow of the device, which is usually referred to Ih \'Holding Current\' and Im \'Maximal Trigger Current\'. The Ih parameter is to decide how much the current flow through after the voltage is turned on, while Im is the current flowing when the device is triggered. The L2004D5TP features high Ih ratio and low Im, providing a very stable performance.

Along with the advantages of low power consumption, L2004D5TP also has outstanding properties including high temperature resistant, anti-surge, high EMI interference immunity, and voltage sample, which makes them suitable for industrial and domestic applications. Furthermore, it is able to operate with frequency up to 65 kHz, and provides fast response, stable control, and accurate power control. 

The robust and reliable design of the L2004D5TP make it suitable for a wide range of applications. In domestic applications, such as dimming, fans/ventilation/heaters control and refrigerator, the L2004D5TP is able to provide efficient and stable performance and low power consumption. In industrial applications, such as in welding machine, electric motor control and the even the medical equipments, the device can offer robustness, high temperature capability and voltage sample to meet the application requirement. Moreover, the L2004D5TP is widely used in high voltage applications, such as in air conditioners and electric power tools, to provide stable and necessary performance even under high and fluctuating voltages.

The simplicity, robustness, excellent and efficient performance of the L2004D5TP together with its wide voltage ranges are the key advantages which have firmly kept this device as one of the essential choices for a wide range of applications.

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