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".
Question: BQ24072 USB Input Problem
bq24070/1 offers a proprietary boot-up sequence. On the first application of power to the bq24070/1, this feature enables the 100-mA USB charge rate for a period of approximately 150 ms.
For BQ24072, if we fix EN2 EN1 = 0 1, 500mA mode, can it meet the USB IF specification of 100-mA USB current during USB Enumeration? Or EN1 should be changed dynamicly?
Answer: It should probably be done dynamically. The part does come up in 100mA mode to check for shorts and runs some routines but changes to the EN2/1 setting soon after it is finished with the power up. If you want it to stay in 100ma mode, then you need to set EN2/1 to 0/0.
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.