hi.. i want to design a power supply of 7v,3.3v,1.8v respectively with 400m,500m,600m output current... i don want to use flyback regulator.. for which output values i can use linear & for which switching????? vin=12v,Iin=1A.. plz inform can i cascade the individual designs of the above 3...? if yes then either in parrallel or series???
hi.. i want to design a power supply of 7v,3.3v,1.8v respectively with 400m,500m,600m output current... i don want to use flyback regulator.. for which output values i can use linear & for which switching????? vin=12v,Iin=1A.. plz inform can i cascade the individual designs of the above 3...? if yes then either in parrallel or series???
Hi, this depends actually in your application. Yes you can do cascading of the power supply but we need to need what is the sequencing. which one must turn on first or which one must be turned off and which one must remain on for the total operation time and things as such. designing a multi supply system is quite tricky, especially if your application is embedded systems.
But if you want just to power on everything, you can have an SMPS from 12V-7V that could handle the 1A total load. probably 2 linear reg from 7V-3V3 and 3V3-1V8. the linear reg must be calculated for their power dissipations.
There are other possible combinations but depends really on the requirements.
hi mahmoud,
the best reference i ever used is the reference book "switching power supply design", published by Mc Graw-Hill, covering all sectors of switched mode power supply design mystery. clearly it is not free but if you could use this book (or at least some of its chapters), you would have no need to any other subject.