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Q&A

Posts tagged protection

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71%
+3 −0
Q&A 1-wire interface overvoltage protection

I'm designing a robust 1-wire output for an IoT board. The interface should be able to withstand high voltage. Mainly the same voltage level as the board power supply. That's 12V to 36V DC. The p...

1 answer  ·  posted 3mo ago by DeadMouse‭  ·  last activity 3mo ago by Olin Lathrop‭

75%
+4 −0
Q&A Battery protection circuit

I am using two 18650 cells in series to power a RC car. Is the voltage goes below 6.2 V, the battery should be disconnected to prevent over discharging the battery. At the same time I want to imple...

2 answers  ·  posted 2y ago by Stefan‭  ·  edited 10mo ago by Lorenzo Donati‭

70%
+5 −1
Q&A How Relay inrush current limiter works?

In this circuit below the relay circuit part is acting as an inrush current limiter, but I can't understand how it works since the current is flowing in both conditions where the relay is open or c...

1 answer  ·  posted 1y ago by deleted user  ·  edited 10mo ago by Lorenzo Donati‭

66%
+2 −0
Q&A Variant of a Mosfet's Gate-Source protection

Let's say a 100V voltage spike arrives at +12V and the TVS diode clamps it to 25V. Q2 may or may not be activated. Will this circuit ensure a V_gs lower than 25V for the mosfet Q1 ? Any catch to it...

1 answer  ·  posted 1y ago by kellogs‭  ·  last activity 1y ago by Olin Lathrop‭

66%
+2 −0
Q&A Over-voltage protection for device with photovoltaic cell source

I have a solar panel rated for 6V open-circuit and up to 150mA. I would like to connect this to an SPV1040 or similar buck-boost converter with MPPT functionality to be able to charge a 3.6V batter...

2 answers  ·  posted 1y ago by Keelan‭  ·  last activity 1y ago by TonyStewart‭

71%
+3 −0
Q&A Isolated Digital Input - Overvoltage protection

I am trying to build an active-low digital isolated switch capable of withstanding 32VDC voltage without creating any damage to the system. This is the snapshot of the circuit not fulfilling the r...

3 answers  ·  posted 3y ago by 2kind‭  ·  last activity 3y ago by Olin Lathrop‭