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???
12/13/12 19:46
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 		 #188983 - Silabs 6V ports for Class D audio
Responding to: ???'s previous message
Andy Peters said:

Having said that, I'm looking at the Silicon Labs ARM things, and the chips have a small handful of high-drive pins on one of the ports. And the bonus is that these pins have a separate I/O supply, up to 6V, which means they were thinking about logic-level MOSFET drive ...


I see Silabs have just released a Class-D Audio example, using those drivers.
http://news.silabs.com/


Andy Peters said:
Jim Granville said:
Some systems need proper MOSFET drive, to 5V, for lower On resistance & lower edge losses.


True, but a MOSFET gate likely needs more drive than most microcontroller outputs can provide. An external level-shifter/driver might be the ticket.


Depends on the app, but being forced to add more parts, is precisely the problem.
If you are doing a kW inverter, then yes, you will have external drivers, but many simpler power/solenoid/motor apps, just need low power loss.
At the bottom end, one more specialised part is a lot.


List of 37 messages in thread
TopicAuthorDate
NXP stated aim, "to make 8-bit architectures obsolete"            01/01/70 00:00      
   Available in DIP!            01/01/70 00:00      
      no continuity            01/01/70 00:00      
         It gets worse.            01/01/70 00:00      
            We need a small package            01/01/70 00:00      
               Not small enough            01/01/70 00:00      
                  Funny, that!            01/01/70 00:00      
                     Nice size, shame about price            01/01/70 00:00      
            Poor NXP, XMC1000 series announced            01/01/70 00:00      
   No 5V option            01/01/70 00:00      
      just curious            01/01/70 00:00      
         Because it is useful.            01/01/70 00:00      
         RE: why the 5V fascination?             01/01/70 00:00      
            well, you will have to redesign anyhow.            01/01/70 00:00      
         Power MOSFET drive and 5V ADC            01/01/70 00:00      
         5V can be surprisingly useful            01/01/70 00:00      
            Most Automotive parts DO use 5V            01/01/70 00:00      
            why?            01/01/70 00:00      
               Close, but no Cigar...            01/01/70 00:00      
                  MOSFET driver            01/01/70 00:00      
                     Silabs 6V ports for Class D audio            01/01/70 00:00      
                     which means they were thinking about logic-level MOSFET driv            01/01/70 00:00      
                        I was looking for something like this            01/01/70 00:00      
                           isn't it a pity ..            01/01/70 00:00      
                              this            01/01/70 00:00      
                                 but that is ~15 bucks :)            01/01/70 00:00      
                                    for one off            01/01/70 00:00      
                                       four bucks!            01/01/70 00:00      
                                 Not 8051            01/01/70 00:00      
                                    HUH?            01/01/70 00:00      
                                       What??? Which SiLabs clocks at >168E6?            01/01/70 00:00      
                                          he means higher than 80Mhz            01/01/70 00:00      
                           just wait            01/01/70 00:00      
                        MOSFET drive            01/01/70 00:00      
               More than 5V tolerant inputs            01/01/70 00:00      
   yeah and your problem is?            01/01/70 00:00      
   You ask me Andy            01/01/70 00:00      

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