Capacitor between PH and BOOT
D/S p.14 BOOST CAPACITOR (BOOT) says it
(e.g. 100nF for 500kHz/5V and 220n for 500kHz/8V.)
How should I have selected the capacitor between Boot as PH?
I make a capacitor between PH and Boot 0.47uF.Will not there be a problem?
It may actually not be better by increasing the value of CBOOST. I am not familiar with this controller, but often there can be a race condition between the BOOT voltage and the Vin voltage. When there is a brief power-down / power-up sequence, there can be issues if the BOOT voltage is higher than Vin.
Normally you want to choose a CBOOST that results in about a 0.2Vp-p ripple (on CBOOST) during operation. Making it too big can cause issues, and it only has to be big enough to properly drive the FET gate.
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.