Application Information

TS4975

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The efficiency is the ratio between the output power and the power supply:

The TS4975 is a stereo amplifier so it has two independent power amplifiers. Each amplifier

produces heat due to its power dissipation. Therefore the maximum die temperature is the sum

of each amplifier’s maximum power dissipation. It is calculated as follows:

In most cases,

Single ended configuration:

Phantom ground configuration:

4.4

Low frequency response

The input coupling capacitor blocks the DC part of the input signal at the amplifier input. In the

with -3 dB cut-off frequency.

Note:

For all inputs, the impedance value remains for all gain settings. This means that the lower cut-

off frequency doesn’t change with gain setting. Note also that 30 k

Ω is a typical value and there

From

η

P

out

P

sup ply

-------------------

πV

PEAK

4V

CC

---------------------

==

η

π

8

---

39.25%

==

TotalP

diss

2P

diss1

=

TotalP

diss

π R

L

---------------------- P

ou t

2P

()

–

=

TotalP

diss

π R

L

---------------------- P

out

2P

()

–

=

F

CL

1

2

πZ

------------------------Hz

()

=