mark.bates
Newbie level 2
I'd like to create a compact 100W DC->DC converter board for a communications system that accepts an input voltage (between 9-36V) and outputs several fixed voltage levels. There are so many options that I'm going in circles on this design. Some of the current draws are too large for linear regulators to be efficient, and so I'm not sure if I should have several stages instead of having everything in parallel. I'm looking for the best value (in terms of efficiency and cost) design as well as some potential part numbers.
In particular,
Vin: 12-35V (100W)
Vout1: 3.3V @ <250mA
Vout2: 5V @ 20 to 500mA
Vout3: 12V @ 1 to 3.5A
Vout4: 15V @ 0.2 to 3.7A
Vout5: -15V @ 500mA
Vout6: adjustable 0-15V @ <50mA
Was thinking of starting with a Vicor 28V DC-DC converter module that accepts 9-36V in with a +15V output (V28C15C100BL) and then using a combination of switching and linear regulators. Should I use a switcher (like the LM2576) to produce the 5V signal from 15 and then have that go into a 3.3V linear regulator? Can anyone suggest a good method to support these various inputs and potentially some part numbers?
Would like to have low ripple on the 3.3 and 5V outputs (controls DGPS and RF LNAs/Switches) as well as the adjustable signal (sets frequency of a voltage controlled oscillator).
Any guidance would be greatly appreciated.
In particular,
Vin: 12-35V (100W)
Vout1: 3.3V @ <250mA
Vout2: 5V @ 20 to 500mA
Vout3: 12V @ 1 to 3.5A
Vout4: 15V @ 0.2 to 3.7A
Vout5: -15V @ 500mA
Vout6: adjustable 0-15V @ <50mA
Was thinking of starting with a Vicor 28V DC-DC converter module that accepts 9-36V in with a +15V output (V28C15C100BL) and then using a combination of switching and linear regulators. Should I use a switcher (like the LM2576) to produce the 5V signal from 15 and then have that go into a 3.3V linear regulator? Can anyone suggest a good method to support these various inputs and potentially some part numbers?
Would like to have low ripple on the 3.3 and 5V outputs (controls DGPS and RF LNAs/Switches) as well as the adjustable signal (sets frequency of a voltage controlled oscillator).
Any guidance would be greatly appreciated.