From 17.0V DC supply I need to generate 15.0V at 500mA isolated power supply and 15.0V at 500mA non-isolated power supply both. I tried with WEBENCH Designer, but wasn't convinced with designs. Please suggest a TI/National part number with schematics if possible. Please refer the power supply tree below for clear reference.
Thanks and regards
In the future, I would recommend making this two separate posts since you want two very different power supplies. I moved this to the isolated forum, where they can help you choose a controller for your isolated need. A flyback would likely be the best option.
For the non-isolated power supply, an LDO would be simplest. The TPS7A4801, TPS7A4501, and TPS73801 all look like options.
On th eassumption that the 17 volts might drop I would recommend the UCC38C45
It is a flyback design and should be fairly simple to implement. With a 50% limitation on the duty cycle you should not have to implement slope compensation.
A resonable app note to review for your design is http://www.ti.com/lit/an/slua274a/slua274a.pdf
Since you are powering this from a 17 volt source you should be able to power it through a simple series regulator that results with VDD at 9 volts.
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.