Other Parts Discussed in Thread: DRV421, OPA454, OPA237, TIPD184
Tool/software:
Dear team,
I am referring to the TI design guide titled ±50A Current Sensor Using Closed-Loop Compensated Hall Element (www.ti.com/.../TIPD180…
Hello. DRV421 can be used aven in +/-15V applications (datasheet point 8.2.3).
However an external driver is nesessary because of the limits of the chip. What driver do you suggest? I suppose operational amplifier followed by npn+pnp…
Hello Mohamed,
You can design a DRV421 to measure 400A DC. I would use this calculator to determine the number of turns required and the Rshunt you would need. Keep in mind the inductance matters (see here) and that will be dependent on the air gap and…
Tool/software: WEBENCH® Design Tools
Dear Sir,
We are working on motor monitoring .and we want to know about the signature analysis of the motor for the monitoring. I was looking for some…
Hi
TI does not have any recommendations for a 100A current sense transformer. I suggest you contact a number of current transformer vendors as they may have a standard or custom part available.
TI does have hall effect current sense devices, this is a…
Hello User
Below are my responses.
1.The DRV401 can drive the Icomp pins to 250mA with VDD = 5V. The voltage swing on the H-Bridge is 4.2 VPP so therefore you will be limited by the number of loop in your compensation coil and the resistance of your compensation…
Hello Barry,
You are correct but I would not design the system expecting the 250mA output but rather design it with the max current of 250mA. Typically most units could reach that but for a robust system I would recommend the minimum guaranteed of 210mA…
Hello user5854835,
Thanks for using the forum. You can use the circuit in TIPD184 which has the similar output amplifier to drive the compensation coil. Please be aware that you need to have the transistors able to drive the current you require and can…
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,…
Dear Javier,
Can you please pass me the your email address.
Because i'll send you the schematic with the FET applied. NOT for Forum.
Thanks and B/R.
Stewart.
Dear, Javier.
Thanks for your friendly support. May I another question as blow.
You can see two TR(Q1,and Q2) in the TIPD184 schematic. We make a review the change to the two FET because the current boosting in our application
do you know have any problems…
Stewart,
Thank you for using the E2E. I would like to ask if there is a particular reason you would like to use the OPA277. Is it just available to you. I have used the OPA277 in many of my applications for its low offset, low noise and low drift. For…
In last month’s post, I talked about the relationship between an external reference on the output stage of the DRV411 and the common-mode output of the H-bridge compensation-coil drive stage. This month, I’ll take a look at motor drives and industrial…
