TS4984 datasheet(20/29 Pages) STMICROELECTRONICS

Part #	TS4984

Description	2 x 1W Stereo audio power amplifier with active low standby mode

PDF	29 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

Logo

20 / 29 page

TS4984

Application Information

20/29

The following graph (Figure 65) shows an example of Cin and Cfeed influence.

4.4 Power dissipation and efficiency

Hypotheses:

l Voltage and current in the load are sinusoidal (Vout and Iout).

l Supply voltage is a pure DC source (Vcc).

Regarding the load we have:

and

Therefore, the average current delivered by the supply voltage is:

The power delivered by the supply voltage is:

Figure 65: Frequency response gain versus Cin & Cfeed

100

1000

10000

-25

-20

-15

-10

-5

Rin = Rfeed = 22k

Ω

Tamb = 25

°C

Cfeed = 2.2nF

Cfeed = 680pF

Cfeed = 330pF

Cin = 470nF

Cin = 82nF

Cin = 22nF

Frequency (Hz)

out = VPEAK sinωt

(V)

out =

out

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

(A)

out =

PE AK

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

(W)

AV G

= 2

PEAK

πR

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

(A)

su ppl y

AVG

⋅

()

TS4984 Datasheet(PDF) 20 Page - STMicroelectronics

TS4984 Datasheet(HTML) 20 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29

Datasheet Download

Link URL