Schottky diode packaging and application

encapsulation

Schottky diodes are divided into two packaging forms: lead and surface mount (patch). Schottky diodes with lead type packaging are commonly used as high-frequency high current rectifier diodes, freewheeling diodes, or protective diodes.

It has two packaging forms: single diode and twin diode. Schottky diodes have three pin extraction methods: common cathode (connecting the negative terminals of two diodes), common anode (connecting the positive terminals of two diodes), and series (connecting the positive terminal of one diode to the negative terminal of the other diode).

Schottky diodes that use surface packaging come in various packaging forms such as single diode, double diode, and triple diode, with A to 19 pin extraction methods.

application

The main advantages of SBD include two aspects:

(1) Due to the Schottky barrier height being lower than the PN junction barrier height, its forward conduction threshold voltage and forward voltage drop are lower than those of PN junction diodes (about 0.2V lower).

(2) Due to SBD being a majority carrier conductive device, there are no issues with minority carrier lifetime and reverse recovery. The reverse recovery time of SBD is only the charging and discharging time of Schottky barrier capacitors, which is completely different from the reverse recovery time of PN junction diodes

Time.

Due to the very low reverse recovery charge of SBD, the switching speed is very fast and the switching loss is particularly small, making it particularly suitable for high-frequency applications.

However, due to the thin reverse potential barrier of SBD and the high likelihood of breakdown on its surface, the reverse breakdown voltage is relatively low. Due to SBD being more prone to thermal breakdown than PN junction diodes, the reverse leakage current is greater than that of PN junction diodes.