TS4975 datasheet(27/36 Pages) STMICROELECTRONICS

Nome de Peças	TS4975

Descrição Electrónicos	Stereo Headphone Drive Amplifier with Digital Volume Control via I2C Bus

PDF	36 Pages

Scroll/Zoom	100%

Fabricante Electrônico	STMICROELECTRONICS [STMicroelectronics]

Página de início	http://www.st.com

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27 / 36 page

TS4975

Application Information

27/36

and its value is:

Note:

This maximum value depends only on power supply voltage and load values.

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

The maximum theoretical value is reached when VPEAK = VCC/2, so

Phantom ground configuration:

The average current delivered by the supply voltage is:

Figure 61. Current delivered by supply voltage in phantom ground mode

The power delivered by supply voltage is:

Then, the power dissipation by each amplifier is

and the maximum value is obtained when:

and its value is:

Note:

This maximum value depends only on power supply voltage and load values.

diss

MAX

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

()

out

sup ply

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

πV

PEAK

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

---

78.5%

Icc

AVG

---

PEAK

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

()

sin

∫

PEAK

πR

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

()

sup ply

CCICC

AVG

()

diss

22VCC

π R

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

ou t

()

–

out

∂

∂P

diss

MA X

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

()

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