About output power vs supply voltage for high power HP AMP

yoshihiro hirata

Other Parts Discussed in Thread: TPA1517, LM1877, LM386, LM4880, TPA6205A1

Could you provide graph about output power vs supply voltage with following devices and conditions.
I am maiking a search headphone amp which can drive about 120mW with these condirions.

<condition>
33 ohm
THD=1%

<device>
TPA1517
LM1877
LM386

Best regards,
Yoshihiro Hirata

over 8 years ago

0 Diego Melendez over 8 years ago

TI__Guru 57800 points

Hi Yoshihiro,

These devices are quite old and it could be difficult to get the plots you are requesting. I would suggest you to use our Audio Selection Tool and take a look to our latest Headphone Amplifiers. Maybe LM4880

Regards,

-Diego Meléndez López
Audio Applications Engineer

0 yoshihiro hirata over 8 years ago in reply to Diego Melendez

Expert 1425 points

Dear Diego-san

Thank you for your replay.

LM4880 don't meet our spec.
Now, we are considering follow spec.
So, I selected TPA1517, LM1877 and LM386.

<Spec>
RL= 33 ohm
THD = 1 %
Po = 120mW

Could you let me Minimum Supply Voltage about these spec?
I hope your data is included a device efficiency.

Best regards,
Yoshihiro Hirata

0 Ivan Salazar over 8 years ago in reply to yoshihiro hirata

TI__Guru* 95145 points

Hi Hirata-san,

I think you can take a look at TPA6205A1, it should be able to provide 0.2 W @ 3.6 V / 32 Ohm / THD+N = 1%.

You can see its performance at Typical Characteristics section, mainly Figure 2 and Figure 3.

I hope this suggestion fits better to your specs.

Best regards,

Ivan Salazar

Texas Instruments

0 yoshihiro hirata over 8 years ago in reply to Ivan Salazar

Expert 1425 points

Dear Ivan-san,

Thank you for your advice.
TPA6205A1 is BTL output AMP.
I want to use SE output AMP. Because it is easy to use in headphone jack system.

Best regards,
Yoshihiro Hirata

Audio

Audio forum

About output power vs supply voltage for high power HP AMP