I have 9v AC(1A, 50Hz) as input to 5v DC(500mA) as output rectifier circuit to power up the development board. But I had a doubt if I use Schottky diode instead of normal diode what happens to the circuit. By watching many videos I understand that Schottky diode can operate at high frequency, lower temperature dissipation. But it has more leakage current compared to the normal diode Is that it will affect the rectifier circuit?
Electronic – Can somebody explain why normal diode(1N4001 or 1N4007) is used in rectifier bridge insteed of schottky diode
bridge-rectifierdiodes
Related Solutions
Yes. The 1N4007 can withstand a higher reverse voltage(\$V_r\$), 1000V vs. 50V. The 1N4007 may even be a better choice, esp. if your motor is powered by a voltage near 35V. (The 1N4001 is rated for a \$V_{r(RMS)}\$ of 35V.)
While diodes like 1N400x may be well suited as freewheeling diodes in terms of voltage and current (rated at 1A), they're not exactly fast. To protect your transistors Schottky diodes would be a better choice, but they usually have limited \$V_r\$.
Here's the \$V_r\$ for the 1N400x series:
1N4001: 50V
1N4002: 100V
1N4003: 200V
1N4004: 400V
1N4005: 600V
1N4006: 800V
1N4007: 1000V
simulate this circuit – Schematic created using CircuitLab
Figure 1. Centre-tapped energy harvester.
If you double the coil windings you can halve the diode losses as shown in Figure 1. Only one diode will be conducting at any time compared with two on a full-wave bridge.
Since each winding conducts only half the time the wire gauge can be reduced for the same total output power.
It won't hurt to parallel the diodes and may result in ever-so-slightly lower voltage drop.
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Best Answer
Traditional diodes are cheaper than schottky diodes and they can usually block a higher voltage in the opposite direction. In most power rectification applications like yours schottky diodes are used to limit voltage drop and power loss.
In your case whether or not you need a schottky diode depends if you need to limit voltage drop or power loss.