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TPA3116D2-Q1: TPA3116D2-Q1:

Petr Flek
Prodigy 80 points
Part Number: TPA3116D2-Q1
Other Parts Discussed in Thread: TPA3116D2, TAS6424,

Hi,

I need to drive application with 0,5 ohm impedance and current about 10 A(rms). The operating temperature must be in range -40 to 80°C.

The TPA3116D2 has output current 7.5A. This current is for 1 channel, or 2 chanels? When I use PBTL to 0,5, can I drive it by currnet 10A(rms)? 

I have also seen TAS5424C-Q1. The output current in PBTL is good, but there is problem with short protection. The short protection detect short under 1,5 ohm. Is it possible in PBTL mode drive impedance about (1,5/2) 0,75 ohm?

Can you recommend me some another amplifier?

Thank you in advance!

Best regards,

Petr

  • 0
    TI__Expert 6985 points
    Hello Petr! OC trip point would be the max for either channel... meaning if you hit the trip current on either channel the device will trip. Are you trying to drive a 2 channel or 4 channel automotive system? We have newer devices like the TAS6424/22 that may be a better fit.

    Thanks, Jeff
  • 0 in reply to Jeff Kohnle
    Prodigy 80 points

    Hello Jeff,

    thank you  for your advice.

    I want to trying to drive 1 channel with impedance about 0.5 ohm.

    I saw TAS6424, but I want an analog inputs. TPA3116D2-Q1 is cheaper, less complicated etc. When I use a PBTL mode with TPA3116D2-Q1, theoretically I get a current about 15A and 10.5 A(rms).

    Is better use Vcc=24 V or Vcc=12 V?

    Best regards,

    Petr

  • 0 in reply to Petr Flek
    TI__Mastermind 24835 points
    Hi Ptre,
    Could you please let me know why you use a so low load(0.5Ohm), which is very rare. You need to know that, the efficiency is also lower if the load resistance is lower. TPA3116D2-Q1 is not recommended to be used for 0.5Ohm load application. The min load resistance for TPA3116D2-Q1 in PBTL mode is 1.6Ohm, please find this info in section 6.3 in the datasheet. It may work with 0.5Ohm load resistance, but we actually don't have sufficient validation data for this case, because it's not a typical application. We don't know the stability/reliability for it.
    About the power supply voltage, you need to know how much output power is required. Need to calculate the power supply voltage which can support your max output power without clipping and also without OC/OT FAULT. The efficiency is higher with lower power supply in the same condition.
    Best regards,
    Shawn Zheng
  • 0
    TI__Mastermind 24835 points
    Hi Petr,
    Do you have any other question on this? Could you please help to close this question if it's answered?

    Best regards,
    Shawn Zheng