TDA7491HV datasheet(13/50 Pages) STMICROELECTRONICS

Part #	TDA7491HV

Description	20 W 20 W dual BTL class-D audio amplifier

PDF	50 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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13 / 50 page

Figure 11. FFT performance (-60 dB)

Frequency (Hz)

FFT (dB)

-150

-140

-130

-120

-110

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

20k

100

200

500

10k

Specification Limit:

Typical: > 90dB

for the harmonic frequency

Test Condition:

Vcc =14V,

RL= 4 ohm,

Rosc = 39k , Cosc = 100nF,

f = 1kHz,

Gv=30dB,

Po= -60dB (@ 1W =0dB)

Tamb=25

Figure 12. Power supply rejection ratio vs. frequency

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

20k

100

200

500

10k

Test Condition:

Vcc =14V,

RL= 4 ohm,

Rosc = 39k , Cosc = 100nF,

Vin=0,

Gv=30dB,

0dB refers to 500mV,100Hz

Tamb=25

Ripple frequency=100Hz

Ripple voltage=500mV

Figure 13. Power dissipation and efficiency vs. output power

Test Condition:

Vcc=14V,

RL=4 ohm,

Rosc=39k , Cosc=100nF,

f =1kHz,

Gv=30dB,

Tamb=25

Vcc=14V

Rload=4ohm

Gain=30dB

f=1kHz

TDA7491HV

4 Ω loads at VCC = 14 V

DS5624 - Rev 10

page 13/50

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