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: BQ24061 - Power Down Battery Pin Leakage
The part has protection to prevent battery drainage. This is working correctly. The issue I have is when no power is present at pin 1 and the chip is not enabled by setting pin 8 high at 3.3V I'm getting a voltage around 800mV at pin 1. I'm assuming the voltage at pin 8 is feeding in through the part and out of pin 1 because when pin 8 is low there is no voltage on pin 1. So my question is when no power is present at pin 1 should there also be no power present at pin 8?
Answer: There is an internal impedance of around 4k between the CE and Vin, so there will be a voltage on Vin. If this does not cause an issue in the system, then this can be ignored. If it creates an issue then a pull down resistor can be put between Vin and gound and more resistance can be put in series with the CE pin to lower the voltage on the Vin pin.
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.