SP725ABTG Datasheet/PDFTVS - Mixed Technology
SP725ABTG is a type of mixed technology transient voltage suppressor (TVS). It is a combination of an avalanche breakdown diode and a thyristor, hence recognized as a mixed-technology device. Its application field and working principle are discussed next.
Application Field
The SP725ABTG is used to protect devices from electrical overstress (EOS) caused due to lightning waves, power induction, and power short circuits. These conditions may result in high voltage transients which can cause damage to the sensitive electronic components and circuit boards. The SP725ABTG is capable of both uni-directional and bi-directional protection, and can also operate in common-mode and differential-mode. As a result, it is suitable for protecting a range of solutions including I/O, Ethernet, USB, HDMI, PoE, automotive, communications, and aerospace circuits.
Working Principle
The SP725ABTG operates on a hybrid principle, where the avalanche breakdown diode and the thyristor work together to provide the required protection. The avalanche breakdown diode and thyristor are connected in series and are triggered to start conduction by the voltage stress. When there is a high voltage transient, the avalanche breakdown diode is triggered first, which conducts current through the thyristor, causing it to latch into a conducting state. This clamps down the voltage and absorbs its energy, thereby suppressing the voltage transient. The system remains in a conducting state even after voltage transient has been suppressed, and dissipates the absorbed energy as heat. After this, the system reconnects automatically and the device is ready to protect against the next voltage transient.
The SP725ABTG is ideally suited for high-efficiency, low-cost, and reliable transient voltage protection. Its hybrid action can protect electronic circuits from different levels of overvoltages and overcurrents. It also features a low clamping voltage and very low leakage current. This device offers a wider ESD protection of up to 30kV, and has an operating temperature range of -40~125℃, making it an ideal solution for automotive, telecommunications, and consumer electronics.