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TPA3106 used in DC mode

Lou Faustini
Prodigy 90 points
Other Parts Discussed in Thread: DRV595

Hello. I need to use a class-D amp to drive a

DC inductive load.. (big solenoid used for positioning)

I was going to use the TPA3106 - it appears to have DC

continuity throughout the device, and a differential input.

(seems perfect) Has anyone done this, and

if the answer is "no, don't use it for that" can they recommend

a class-D that is good for DC applications?

  

  • 0
    TI__Genius 9175 points

    Hello,

    By their nature Class D amplifiers are not DC amplifiers in the sense of DC in = DC out. They have PWM modulation that switches or pulses a constant DC value rail onto a load.

    Regards,

    -Matt

     

  • 0
    TI__Mastermind 37045 points

    Hi Lou,

    You may want to check out DRV595. It may be more suitable to your application.

    http://www.ti.com/product/drv595

    reg,

    Paul Chen

    Audio Applications Engineer

    Dallas TX

  • 0 in reply to user5276421
    Prodigy 90 points

    Is there any good technical reason I cant us the TPA3106 part?

    For example - are any of the feedback paths in the amp AC coupled??

    Is it designed specifically to NOT pass DC ?

       I completely understand that PWM is not "DC" in the traditional 

    sense - In general I just want to use the TPA3106 as a pulse width

    modulator under DC control - like a glorified 555 - but with big FETS

    built in..