Should you include TVS protection diodes in your circuit?
Example INA250 schematic with TVS protection diodes
In the above simplified circuit diagram, TVS diode (tranzorbers) are incorporated to the input pins of the INA250 , as often recommended…
The are many ways to measure current and Texas Instruments has a diverse portfolio to do exactly that!
Here are a few links to get you started measuring current with TI products:
If you don't know where to start with your current measurement design,…
Per-Åke,
Mayrim and I looked over your schematics and and discussed this a bit. If I'm not mistaken, you've got a 3-phase H-bridge driver circuit and you're monitoring each phase with a high-side shunt. Is that correct? I'll assume it is and move…
Patrick,
Check out TIDA-00302. It's a TI Design about transient robustness for current shunt monitors , but many of the principles still apply. Depending on how the EOS event is happening - like if the supply voltage has a transient that exceeds the…
Courtland, So you see VOUT = 0.7V and VIN = 3.1mV with no load. Once you connect phone, does VOUT become a correct value? Or can it become 2V to 3V and thus this does not represent actual current? These seem like separate problems. If you can measure…
Hi Tomohiro,
We do not have any surge tolerance data on INA213. What kind of surge voltages are you expecting. Please read section 8.4.4 and 8.4.5 in the datasheet and also look at this TI design on transient Robustness www.ti.com/.../TIDA-00302
Hi Dave,
You may be right about large input tranisient causing this permanent damage. You can try the suggestions in 8.4.5 section in the datasheet for improving transient robustness. INA214B devices are certainly less sensitive to these tranisients compared…
Hello Eason, I believe you may be experiencing transient spikes on your supply voltage and/or common voltage pins. Please obtain oscilloscope screenshots measuring your supply voltage and common voltage on power-up with your setup. If you are experiencing…