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TPA2010D1: Current protection and startup protection logic

Goekhan Kaya
Prodigy 580 points
Part Number: TPA2010D1
Other Parts Discussed in Thread: TPA2011D1

Hi everyone

A customer would like to get some clarifications on this product.

1. Chapter 12 in the datasheet states that the current capability of the upper power should not exceed the maximum current limit of the power switch. Does that mean that this device does not feature a current limiter and therefore the power supply current must be limited? What is the maximum current of the power switch?

2. What does the "startup protection logic"  shown in section 10.2 in the datasheet do?

Thanks in advance and best regards,

Goekhan

  • 0
    TI__Guru* 95175 points

    Hi Goekhan,

    We'll take a look at your questions and reply as soon as possible.

    Best regards,
    -Ivan Salazar
    Applications Engineer - Low Power Audio & Actuators

  • 0 in reply to Ivan Salazar
    TI__Guru* 95175 points

    Goekhan,

    Sorry for the late response. TPA2010D1 features short-circuit and over-temperature protection.
    Short-circuit protection is based on current, protection should trigger around ~1.5A.

    Startup protection logic basically means that the device must be power-cycled to resume normal operation if protection has been triggered.
    Some devices like TPA2011D1 have auto-recovery protection schemes.

    Best regards,
    -Ivan Salazar
    Applications Engineer - Low Power Audio & Actuators

  • 0 in reply to Ivan Salazar
    Prodigy 70 points

    Ivan, thank you for your answer.

    So, if the TPA2010D1 features a short-circuit and over-temperature protection, can you explain the reason of the remark about the current capability of the upper power in chapter 12 please? 

    Furthermore, where can I find the ~1.5A in the datasheet?

    Thank you for your help.

    Romain

  • 0 in reply to Romain Gloo
    TI__Guru* 95175 points

    Romain,

    It has been some time since this was redacted, and it's pretty confusing for me to be honest. I think what it tries to explain is that the supply current capability should be high enough for the highest current demand of the amplifier, basically the other way around as what you initially suggested.

    The current limit is not stated in the data sheet, but it has been tested on the bench for similar TPA201x devices.

    Best regards,
    -Ivan Salazar
    Applications Engineer - Low Power Audio & Actuators