TI E2E Community
bq2000T Input Voltage Requirement
Welcome to the Battery Management Section of the TI E2E Support Community. Ask questions, share knowledge, explore ideas, and help solve problems with fellow engineers. To post a question, click on the forum tab then "New Post".
Q: bq2000T application
Q1) Customer will use 8s NiMH cells, with a max cell voltage of 2V and a charge rate of C/4. What is min input voltage to support this? I am guessing its 16V plus a couple of volts overhead to allow for voltage drops. Is this enough or is there a more exact calculation?
A1) Yes, 16V is a good voltage (would not go below 15V minimum). It is normal for a range of charge current since the current can vary depending on the input voltage, output voltage and component tolerances. I would suggest a charge between C/3 and C/2 because one gets a more reliable termination at C/3 and above and since the current can vary 20 to 30%.
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.