【 Weak current College 】 query parameters using the diode terminology 】

The interelectrode capacitance diode

We know that the diode with easy from P to N-type semiconductor through current, but in the opposite direction is adopted. Both of these characteristics together produced a capacitor, the cumulative effect of the charge. Accumulation with charge, of course, to discharge. Discharge can be in any direction. The diode is in only one direction through this current; strictly speaking is not valid. This situation is obviously at high frequencies. Therefore, the diode capacitance of very small is good.

Maximum ratings

Maximum reverse peak voltage VRM even if no reverse current, so long as continually improving reverse voltage, sooner or later the diode is damaged. This can add reverse voltage, not instantaneous voltage, and is repeated with forward-reverse voltage. Due to the rectifier and voltage of the AC, its maximum value is provided for important factor.

Maximum DC reverse voltage VR

The above maximum reverse peak voltage is repeated with peak voltage, VR is continuously adding value when DC voltage. For the DC circuit, maximum DC reverse voltage for determining the allowed values for the upper limit is very important.

Max surge current Isurge

Allow the flow of excessive forward current. It is not a normal current, but instant-current, this value is quite large.

Maximum average rectified current IO

In the half-wave rectifier circuit, through the load resistor of average rectified current maximum. This is a design-time very important values.

Maximum AC input voltage VI

In the half-wave rectifier circuit (resistance load), the valid values for sinusoidal AC voltage. This is also very important when selecting rectifier. Maximum peak forward current flows through the IFM is the maximum current value, this is the design of rectifier circuit is an important parameter.

Maximum power P

Innovations in the current flows through the diode, heat absorbing, make their own temperature rise. Maximum power of p is the maximum power. Specifically it is added to the diode voltage multiplied by the ends of the flow of electric current. The limit parameter on Zener diode, varistor diode is particularly important.

Reverse current IR

In General, the diode reverse current flows through in no, in fact, plus some reverse voltage, electric current flows through, this is the reverse current. Needless to say, good diode reverse current smaller.

Reverse recovery time
　
From the forward voltage into reverse voltage, ideally close to instantaneous current, in fact, a little time to delay. Determine the amount of current as of the time delay is reverse recovery time. Although it has a direct impact on the speed of the switching diode, but not necessarily saying that this value would be great.