Banner
rectifier diode

rectifier diode

Introduction to product description: Rectifier diode is a semiconductor device that can convert alternating current into direct current. Rectifier diodes are widely used in various power rectifier circuits. When we choose rectifier diodes, we mainly consider its maximum reverse working voltage VR, maximum average rectified current IF, maximum reverse working current IR, maximum working frequency fm and reverse Parameters such as recovery time trr. The power supply has low frequency and high frequency. For series regulated power supply, this is a kind of power supply that continuously adjusts the voltage drop of the power tube to obtain a stable output voltage when the input or output changes. In the state of linear amplification, this circuit does not require very high reverse recovery time of the rectifier diode, so this power rectifier diode only needs to meet the maximum rectified current.

Product Details

product description

Rectifier diode is a kind of semiconductor device that can convert AC power into DC power. Rectifier diodes are widely used in various power rectifier circuits. When we choose rectifier diodes, we mainly consider its maximum reverse working voltage VR, maximum average rectified current IF, maximum reverse working current IR, maximum working frequency fm and reverse Parameters such as recovery time trr.

The power supply has low frequency and high frequency. For series regulated power supply, this is a kind of power supply that continuously adjusts the voltage drop of the power tube to obtain a stable output voltage when the input or output changes. In the state of linear amplification, this circuit does not require very high reverse recovery time of the rectifier diode, so this power rectifier diode only needs to meet the maximum rectified current.

But for the switching regulated power supply, it obtains a stable output voltage by adjusting the conduction or cut-off of the power tube. This kind of thing is that the regulator tube works in a saturated conduction state, and its rectifier circuit is for the working frequency of the rectifier diode used. Relatively high, and the reverse recovery time is also required to be short. At this time, you need to choose a fast recovery diode or even a Schottky diode.

Features

The rectifier diode uses the unidirectional conductivity of the PN junction to convert alternating current into pulsating direct current. Rectifier diodes have large leakage currents, and most of them are packaged with surface contact materials. The appearance of the rectifier diode is shown in Figure 1. In addition, the parameters of the rectifier diode also include the maximum rectifier current, that is, the maximum current allowed to pass through the rectifier diode for a long time. It is the main parameter of the rectifier diode and the main basis for selecting the rectifier diode.

Product inspection method

First, remove all the rectifier diodes in the rectifier, and use the 100×R or 1000×R ohm range of a multimeter to measure the two outgoing wires of the rectifier diode (test once at the beginning and end). If the two measured resistance values ​​are very different, for example, the high resistance value is as high as a few hundred KΩ to infinity, and the small resistance value is only a few hundred Ω or less, it indicates that the diode is good (except for the soft breakdown diode). If the measured two resistance values ​​are almost equal, and the resistance value is very small, it means that the diode has been damaged and cannot be used. If the resistance measured twice is infinite, it means that the inside of the diode is disconnected and cannot be used.

Send Inquiry