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TS3A227E 使用

user5134806
Prodigy 100 points
Other Parts Discussed in Thread: TS3A227E

I’ve some questions about its application in Smart phone or NB.

  1. How does TS3A227E route its internal switch when different external audio accessory insertion?

For example, 3 poles or 4 poles headset is plugged in, how does it judge? I’m not able to understand well from its datasheet.

  1. When TS3A227E is used in type c connector of smart phone or NB, it’s able to detect and automatically change internal

Switch if 3.5mm headset is inserted through a converted cable. However, if an earphone with type c interface is

directly plugged in, how does it work?

Thanks.

  • 0
    TI__Guru**** 295050 points

    Hello, I have posted your questions to the e2e forum, and our foreign engineer has replied and attached one application note about how audio jack detection works, hope it is useful for you, please for your reference:

    e2e.ti.com/.../730100

  • 0 回复 Kailyn Chen
    Prodigy 100 points
    Thanks for your sharing, however, I still have 3 puzzles needed your helps.
    1. In my opinion, audio accessory adapter, should include two kinds: 3.5mm headset and type c earphone.
    As for these two category devices, they both have the same pull-down 1k ohm resistor on CC signals, detected by CC controller, right?
    2. If a type c earphone is inserted into a type c port in a smart phone or NB, how can the system detect the plug orientation of type c earphone,
    and then adjust TS3A227E internal switch according to earphone?
    3. Do you know the internal signal connector in a type c earphone? If yes, please share it with me.