What are the main parameters of TVS diode?

What are the main parameters of TVS diode?

TVS diode are mainly used in power circuits, switching power supplies, power adapters and other related products. TVS diode are a new and efficient circuit protection component, widely used in electronic protection components. The main parameters of TVS include: reverse operating voltage, maximum reverse leakage current, breakdown voltage, test current, pulse peak current, maximum clamping voltage, and pulse peak power.

1. Reverse Operating Voltage (VRWM): VRWM represents the highest voltage at which the TVS transistor is not conducting. When the device operates in reverse, the voltage value at both ends of the device under the specified IR is called the maximum reverse operating voltage.

2. Maximum reverse leakage current (IR): The reverse leakage current at the reverse working voltage VRWM.

3. Breakdown voltage (VBR): The voltage at which the TVS tube passes the specified test current IT, which is the marker voltage indicating the conduction of the TVS tube. The breakdown voltage of TVS tubes has an error range of ± 5% (± 10% without "A").

4. Test current (IT): The breakdown voltage VBR of the TVS tube is measured at this current, and the general value is 1MA.

5. Pulse peak current (IPP): 10/1000 allowed for TVS tubes to pass through μ Maximum peak current of s-wave (8/20 μ The peak current of the s-wave is about 5 times its value, and exceeding this current value may cause permanent damage. In the same series, the higher the breakdown voltage, the smaller the peak current allowed to pass through the tubes, reflecting the surge suppression ability of TVS tubes.

6. Maximum clamping voltage (VC): The voltage present at both ends of a TVS transistor when it flows through a pulse peak current IPP.

7. Pulse peak power (Ppp): Pulse peak power Ppp refers to 10/1000 μ The product of the peak pulse current IPP of the s-wave and the maximum clamping voltage VC, i.e. Ppp=IPP * VC.