The transient-suppression tag has no wiki summary.
4
votes
2answers
106 views
How to properly snub transient spikes from a transformer and prevent switch mode power supply burn out
I've received a failed switch-mode DC-DC step down converter (part# LTC3631 from Linear). This circuit was driven by a 24VAC transformer which is rectified on the circuit:
simulate this ...
7
votes
1answer
385 views
How to decide between a TVS or Zener diode for overvoltage protection?
I'll leave my specific circuit out of this for a more broad question:
What criteria does one use when deciding whether to use a Zener diode or a transient voltage suppressor, for overvoltage ...
7
votes
2answers
499 views
What are bidirectional Zener diodes used for in DC transient protection?
I often see two zeners (in opposition to each other) being placed across the power supply rails. I don't understand why that is necessary.
For example, if I have a 16V Zener diode and a 12V power ...
5
votes
2answers
641 views
Flyback diodes issues and pull-in & hold current issues in this Relay circuit
Although this may be a basic question but I'm still struggling with it. In this schematic, two zener diodes D1 and D2 are connected back-to back across relay coil L1. The BVds = -30V for Q1. Can I use ...
4
votes
1answer
145 views
How does a high voltage condition break down a semiconductor?
I have TVS diode in parallel with circuitry for ESD/lightening/transient voltage protection. Say I receive an over-voltage condition which is beyond the specifications of the part, what happens ...
4
votes
2answers
507 views
Long supply line and capacitor to prevent voltage drop
I have a 30 feet line with DC supply 12 V. A motor on the end draws about 0.5 Amps initially (100 ms). It's logic shuts down because of the line's voltage drop caused by inrush current.
A capacitor of ...
8
votes
2answers
2k views
How to limit inrush current?
I'm designing a device powered from USB. The device uses FTDI FT2232 chip for USB connection. Upon a command from a computer FT2232 chip should enable power via a MOSFET switch to rest of the circuit. ...
2
votes
2answers
247 views
Are transient suppression diodes necessary for a battery powered system?
I've seen on designs where there is a TVS transient suppression diode on the voltage supply. For example, when the voltage supply is say a wall plug.
However, are such diodes really necessary in a ...
