efficiency of DCDC power management

[lovexxnu]

Hi, who know what is the mainstream efficiency of DCDC power management?
I ever found some productions which is higher than 98%, I wonder what is the mainstream now and what is the goal for the industry of power management.
Thanks!

 

[montgemory]

I am a freshman from China and I undertake a project that design a LED driver, which contains a DC-DC in it. I look up some datasheets, and find that most productions have the efficiency above 80%. I wonder how the 98% can be designed.

 

[leo_o2]

It depends on application. For main power supply in portable device, I think 90% efficiency is required for normal operating condition. For series LED, efficiency should be around 80% because the difference between VIn and VOUT is too big.

 

[elantra]

of course the effiency is the higher, the better. the problem is, in some applications, you are not possilbe to acchieve 98%, even 90%. so, talking about this issue without the application is none-sense.