INPUT Voltage range 18v- 60v
Output Voltage 5V
output current 4A
Isolated Feedback of voltage
i have checked the TI, No IC IS MEETING the requirment.
please suggest solution
There is a lot of solutions: http://focus.ti.com/paramsearch/docs/parametricsearch.tsp?family=analog&familyId=398&uiTemplateId=NODE_STRY_PGE_T
Check the [v] Flyback and [v] Current/Current Mode and then you have a tons of ICs.
What you are looking for is not a single IC. What you need is a conplete power converter. You can go on line to Bodo's Power and review the May 2012 issue where there is an article on how to design a Discontinuous Flyback Power Converter that might help guide you through the process.
You may also look at TI Literature No. SLUU087B. It is a detailed User Guide for the UCC3809 but I put in all of the power stage design equations for a discontinuous mode flyback converter design so it isn't really exclusive for that particular controller.
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