Electrostatic protection of transient suppression diodes

Electrostatic protection of transient suppression diodes

transient suppression diodes is a widely used new type of high-efficiency circuit protection device, which has extremely fast response time (sub nanosecond level) and relatively high surge absorption ability. When its two ends are subjected to instantaneous high-energy shocks, the transient suppression diodes can change the impedance value between the two ends from high impedance to low impedance at a very high speed, in order to absorb an instantaneous large current and clamp the voltage at both ends to a predetermined value, thereby protecting subsequent circuit components from the impact of transient high-voltage spikes. Because of this, TVS can be used to protect equipment or circuits from transient voltages generated during static electricity, inductive load switching, and overvoltage generated by induced lightning.

The indispensable electrostatic protection of transient suppression diodes Group action in PCB design criteria

transient suppression diodes electrostatic protection, in short, ESD is the rapid neutralization of charges, which the electronics industry spends billions of dollars annually on. I should know that all substances are composed of atoms, with electrons and protons in them. When a substance gains or loses electrons, it loses its electrical balance and becomes negatively or positively charged. Positive or negative charges on the surface of the material can cause static electricity to attach to the object. Charge area damage is usually caused by material contact and separation, and can also be caused by friction, known as frictional electrification.

Current enters the circuit loop through induction, which is closed and has varying magnetic flux. The current in the picture is proportional to the area of the ring. A larger loop contains a larger magnetic flux, which induces a stronger current in the circuit. Therefore, it is necessary to reduce the surface area of the loop. The common surface loop is formed by the power supply and ground wire. Under possible conditions, a single-layer PCB design with a power to ground plane can be used. One layer of circuit board not only reduces the surface area of the power supply and the circuit connected to their home, but also reduces the high-frequency EMI electromagnetic field generated by ESD pulses.