TPA6211A1-Q1 Short Circuit Detection

Toshio Ushikubo

Mastermind 9620 points

Other Parts Discussed in Thread: TPA2005D1-Q1, TPA6211A1-Q1, TPA6211A1, TPD2E2U06-Q1

Hello,

Customer evaluated their trial board using TPA2005D1-Q1 as I reported on following URL.

https://e2e.ti.com/support/applications/automotive/f/26/t/488285

Speaker cable is longer than 100mm so they should need LC filter, but their board doesn’t have space.

So they start to consider TPA6211A1-Q1 too.

Please answer following questions.

Q1:

TPA6211A1-Q1 datasheet doesn’t explain any short circuit detection.

I observed output waveform using TPA6211A1 EVM with 0.1uF capacitors are connected at Vo+/Vo- and TPA6211A1-Q1 output normal amplified waveform, so I think TPA6211A1-Q1 doesn’t have short circuit detection.

I want to conform TPA6211A1-Q1 doesn’t have shirt circuit detection.

Q2:

In case of using TPA6211A1-Q1 customer wants to connect 0.1uF capacitor at Vo+/Vo- terminal to GND to enhance ESD endurance.

Does 0.1uF capacitor influence to device operation?

Best Regards.

over 8 years ago

0 Clancy Soehren over 8 years ago

TI__Mastermind 23810 points

Toshio,

Q1: The TPA6211A1-Q1 is a Class AB amplifier, so the short circuit protection works a little differently. The outputs can be shorted to ground, VDD, or each other, and the device will go into thermal shutdown, but not be damaged.

Q2: The capacitors should be OK, but I'll double check. What load, output power, and input voltage are they using?

0 Toshio Ushikubo over 8 years ago in reply to Clancy Soehren

Mastermind 9620 points

Hello Calncy-san,

Thank you for your answer.

They will use 6ohm speaker, output power is 1W maximum and input is sin wave.
Please advise the influence of 0.1uF capacitor at Vo+/Vo-.

Best Regards.

0 Clancy Soehren over 8 years ago in reply to Toshio Ushikubo

TI__Mastermind 23810 points

Toshio,

The 0.1uF capacitors should be fine. I ran a quick test in the lab to verify that there was no unusual behavior. Have they verified that the capacitors are enough to protect against the ESD levels for the system?

Thanks,

-Clancy

0 Toshio Ushikubo over 8 years ago in reply to Clancy Soehren

Mastermind 9620 points

Hello Clancy-san,

Thank you for your answer.
I will recommend TPD2E2U06-Q1 if 0.1uF capacitor is not enough for ESD protection.

Best Regards.

Automotive (Read-Only)

Automotive Forum (Read-Only)

TPA6211A1-Q1 Short Circuit Detection