Overview
The key function of an ideal diode is to control the direction of current-flow. Current passing through a diode can only go in one direction, called the forward direction. Current trying to flow the reverse direction is blocked. They’re like the one-way valve of electronics.
Current flows in the direction of the arrow.
Voltage Drop typically 0.7v
Types of Diodes
Normal Diodes
| Type | Forward Voltage | Max Forward Current | Example Diode | Image |
|---|---|---|---|---|
| Signal Diode | 0.7v | 300 mA | 1N4148 |
|
| Power Diode | 1.1v | 1A | 1N4001 |
|
Schottky Diodes
Schottky diodes are like regular diodes but with smaller forward voltage drop which is usually between 0.15V and 0.45V. They’ll still have a very large breakdown voltage though. Schottky diodes are especially useful in limiting losses, when every last bit of voltage must be spared.
References
| Reference | URL |
|---|---|
| Diodes - Sparkfun | https://learn.sparkfun.com/tutorials/diodes |