Hi,
As a side project, I had to design a boost converter with the following specifications. For some reasons feelings-based, I designed it manufacturability in mind so not as an one-off.
Vin = 19..30V
Iin = 35A max
Vout = 46..74V, adjustable from a single 3V3 GPIO pin (or any voltage source between 0V and +3V3, can be just grounded for 74V)
Iout=11A max
Pout=750W max
Efficiency around 96-97%
Adjustable input current limit (fault detection threshold) 19..35A
Slow output rampup (1 second)
Enable input
Power good status output
Passive cooling, complete aluminium casing with no holes except for inputs/outputs
Overtemperature protection
Approx. 110x150x45mm with the heatsinks.
Four-phase design. Switch node only overshoots by 17% without snubbers
![Cool 8)](https://www.eevblog.com/forum/Smileys/default/xcool.gif.pagespeed.ic.cOxV6sPNRd.png)
.
Now this was developed for our internal use in our own products, to run 110V vacuum cleaner brushed universal motors, just below the EU extra low voltage limit.
Do you see any point in commercializing it as a separate module? Does anyone see any use for such a DC/DC converter? Would you pay $300-400 for such a unit?