TDA7490LSA datasheet(6/13 Pages) STMICROELECTRONICS

6 / 13 page

2 Electrical characteristcs

TDA7490LSA

6/13

Note: 1 : PO = measured across the load using the following inductor: SUMIDA RCH-108-330K

2 : Fsw =

with R1 in K

Ω; Fsw in KHz R1

3 : Fsw =

with Fext, the frequency of the external oscillator

FSW

Switching Frequency

Internal Oscillator

180

200

220

KHz

FSWR

Output Switching Frequency

Range

with Internal Oscillator (2)

140

250

KHz

with external Oscillator (3)

100

250

KHz

MUTE & STAND-BY FUNCTIONS

VST-BY

Stand-by range

0.7

VMUTE

Mute Range

1.7

2.5

VPLAY

Play Range

AMUTE

Mute Attenuation

IqST-BY

Quiescent Current @ Stand-by

1.5

Figure 3.

distortion vs output power

Figure 4.

output power vs supply voltage

(single)

Table 3.

electrical characteristcs (Refer to the test circuit, VCC = ±14.5V; RL = 6Ω;

Demod. filter L = 33

µH, C = 220nF; f = 1KHz; R1 = 27kΩ; T

amb = 25°C unless otherwise

specified.)

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

4810

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

Fsw

---

⎝⎠

⎛⎞ F

est

⋅

0.01

0.1

100m

200m

500m

THD(%)

Pout(W)

Vs=+/- 13.5V

Rl =8ohm

F=1KHz

+14

+30

+16

+18

+20

+22

+24

+26

+28

Vsupply (V)

Pout (W)

Rload=8 ohm

f = 1KHz

THD= 10%

THD= 1%

+14

+30

+16

+18

+20

+22

+24

+26

+28

Vsupply (V)

Pout (W)

Rload=8 ohm

f = 1KHz

THD= 10%

THD= 1%

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