AUDIOCAPDSP-C55X: Connecting a speaker

Asim Gulzar22

Part Number: AUDIOCAPDSP-C55X

Hi,

I need help according to audio capactive booster pack. I want to connect speaker with this booster pack instead of headset, how can I do this, any one help me

Regard

Asim Gulzar

over 5 years ago

0 Michail Georgiev over 5 years ago

TI__Intellectual 2300 points

Hello,
the board you're referencing is designed to work with headphones with higher resistance (typ. 32 Ohm) than regular speaker 4/8 Ohm. In case of direct connection 3.5mm jack <-> speaker most probably the board output will be overloaded. Meaning that this will lead to irreversible damage to it you should NOT connect speaker directly.
A way to achieve your goal is connecting active speaker with built-in power amplifier. In that case you will have to consider parameters of that amplifier and especially its input impedance to avoid noise problems.

Michail

0 Asim Gulzar22 over 5 years ago in reply to Michail Georgiev

Intellectual 620 points

Hello sir, I have connect booster and launch pad with power amplifier, when I play the song the volume is too low, I have set the volume on booster pack 99, but speaker sound too low, at other end when I connect same audio jack with cell phone, speaker and power amplifier work fine, can you help how I can overcome th his problem

Regard
Asim Gulzar

0 Michail Georgiev over 5 years ago in reply to Asim Gulzar22

TI__Intellectual 2300 points

Hello,
try to compare sound (using same headphones) first on booster pack and then on cell phone at near maximum volume.
Is the booster volume again lower than cell phone? Please check this.

Michail

0 Asim Gulzar22 over 5 years ago in reply to Michail Georgiev

Intellectual 620 points

Hello sir,

Sir I campers headphones sound on both cell phone and booster pack, cell phone headphones sound high as compare to booster pack, I can't understand why happened this, please help to overcome the problem

Regard
Asim Gulzar

0 Michail Georgiev over 5 years ago in reply to Asim Gulzar22

TI__Intellectual 2300 points

Hello,
simply there is a big difference in output stages of the cell phone and booster pack. That's why you are observing this behaviour.
Another reason is that Booster Pack is designed to be "Ultra Low Power" as advertised.

Michail

0 Asim Gulzar22 over 5 years ago in reply to Michail Georgiev

Intellectual 620 points

Ok sir this is right but please tell me how can i complete my project using speaker as ti claim

0 Michail Georgiev over 5 years ago in reply to Asim Gulzar22

TI__Intellectual 2300 points

Can you point me to the TI guide that explains usage of external speakers to verify the situation?

Michail

0 Asim Gulzar22 over 5 years ago in reply to Michail Georgiev

Intellectual 620 points

Dear sir check this url,
processors.wiki.ti.com/.../Audio_Capacitive_Touch_BoosterPack

In point number 7 ti claim for speaker

0 Michail Georgiev over 5 years ago in reply to Asim Gulzar22

TI__Intellectual 2300 points

Ok, the meaning of this chapter should be interpreted as "very small speakers in range of tens to hundreds of mW and impedance of minimum 16 Ohms". If you want more power, say for echoing a whole room you definitely should use externally powered amplifier.
A close case (but not similar) can be the need of amplifying the sound from a PC. There are various types and varieties of them so you can try some which best fits for you.

Michail

0 Asim Gulzar22 over 5 years ago in reply to Michail Georgiev

Intellectual 620 points

Dear sir, I want to drive 300mWatt 8 ohm speaker with this booster pack, please tell me how can I do this, we deal in elevator and my job is design a voice announcement device with some kind of music and floor number anoucement

0 Michail Georgiev over 5 years ago in reply to Asim Gulzar22

TI__Intellectual 2300 points

These 8 ohm are a problem. Just for test try to use two of them in series to get total of 16 ohm and then connect to Booster Pack. Check if the loudness satisfies you. If not enough - some small amplifier should be designed to reach your goal
Michail

0 Asim Gulzar22 over 5 years ago in reply to Michail Georgiev

Intellectual 620 points

Hello sir, can I use 2 amplifier in series for more loudness

Regard
Asim Gulzar

0 Michail Georgiev over 5 years ago in reply to Asim Gulzar22

TI__Intellectual 2300 points

No, same type of amplifiers are never used in series.

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AUDIOCAPDSP-C55X: Connecting a speaker