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.
TPS65218: TPS65218 DCDC5/6 output
Part Number: TPS65218
Test with AM438x EPOS EVM.
#1. When power supply 5V to IN_BU(Pin 27) and CC(Pin25) separately with 5V, DCDC5, DCDC6 output voltage normally.
#2. remove power supply on IN-BU, keep power supply on CC, DCDC5, DCDC6 voltage drop to 0.
#3. According to TPS65218 datasheet, IN_NCC is a output pin, below post seems it is a input signal. even though, since I removed power on IN_BU, I think IN_nCC should be LOW already.
#4. Is this feature tested? Or my understanding to this feature is wrong?
Please read section 5.6.2 Freshness Seal (FSEAL) Bit on page 50 of the TPS65218D0 datasheet, and refer to Figure 5-34. Modes of Operation Diagram on page 47.
DCDC5/6 will only remain on if FSEAL == 1b.
If you supply IN_BU and have a coin cell battery attached to CC pin, the default value of FSEAL is 0b, because it is a factory mode for saving coin cell battery power. To exit the factory mode (and break the "freshness seal"), you need to change FSEAL to 1b using the special I2C sequence provided in the datasheet.
Thanks & Best Regards,
Find the right power solution for your processor or FPGA. Visit www.ti.com/SoCPower today!
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.
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.