This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
Part Number: INA181
The common-mode voltage of INA181 is 26V max.
If this product is used for low-side sensing, can it be applied to higher bus voltage systems?
(For example, 48V or 60V or Higher DC-Bus voltage motor control system)
As long as the device supply shares the same ground as the DC-LINK system and the supply is kept within the allowable limits, the configuration below can be used, provided the voltage across Rsense is within the limits supported by the device
TI makes no warranties and assumes no liability for applications assistance or customer product design. You are fully responsible for all design decisions and engineering with regard to your products, including decisions relating to application of TI products. By providing technical information, TI does not intend to offer or provide engineering services or advice concerning your designs.
In reply to Carlos Silva85:
In reply to Nam, Sang-il:
It is possible to use a low side configuration independently of the power supply voltage. The device itself will require its own supply with a range of 2.7 to 5.5V.
The 26V limitation only applies to the bus voltage where high side sensing is employed.
The Power Supply can exceed the 26V if you are doing low-side sensing because the common mode voltage in this case is close to the ground potential (0V).
In reply to Motaz Khader:
Just to clarify, in case my previous answer generated any questions, yes the device can measure currents on a DC-LINK system of any given voltage, assuming it is a) Used on the low side configuration b) The voltage developed across the Rsense resistor doesn't exceed the maximum values allowed by the device for the IN- and IN+ inputs, for example, in case of large inrush, pre-charge or a temporary inrush caused by a brownout, in which case a clamping mechanism should be employed. c) The device has its own power supply, referenced to the system ground, not exceeding 26V 5.5V, as per datasheet spec.
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with respect to these materials. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.