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: OPA548
I am making a power supply with the OPA548T. I am trying to get +4A of current continuously on the output. My voltage rails are +10V and -5V. My power supply will not go negative. My voltage output will be from 0V to +5V. My current limit will be adjustable from 0.1A to 4A. Will the OPA548 work? I have tried using the OPA549 that doesn't have the current limit adjustment range that I need.
Thanks for the help.
For your -5V and +10V supplies, and 0V to 5V output voltage, OPA548 should work fine for as long as you do not violate the input common-mode and/or output voltage ranges as shown below. However, OPA548 is specified ONLY up to +/-3A dc output current so it may not work at 4A - see below.
I'm not sure what you mean by the lack of current adjustment in OPA549 - it is specified from 0 to +/-10A (see below). If you meant to say the current limit tolerance is above 200mA, this may be calibrated out. But considering that you need 4A dc output current, you should use OPA549 instead of OPA548.
Marek Lis, MGTSSr Application EngineerPrecision Analog - TI Tucson
We are glad that we were able to resolve this issue, and will now proceed to close this thread.
If you have further questions related to this thread, you may click "Ask a related question" below. The newly created question will be automatically linked to this question.
In reply to Marek Lis:
Thanks for the information
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. 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.