TDA8920 datasheet(9/16 Pages) PHILIPS

Part #	TDA8920

Description	2 x 50 W class-D power amplifier

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Manufacturer	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

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9 / 16 page

1998 Dec 01

9

Philips Semiconductors

Preliminary speciﬁcation

2

× 50 W class-D power ampliﬁer

TDA8920

Mono bridge-tied load application

VDD = ±25 V; RL =8 Ω; fi = 1 kHz; Tamb =25 °C; measured in Fig.6; unless otherwise speciﬁed.

Notes

1. Total harmonic distortion is measured in a bandwidth of 22 Hz to 22 kHz, using an 11th-order low-pass filter. When

distortion is measured using a lower order low-pass filter a significantly higher value will be found, due to the

switching frequency outside the audio band.

2. Output power measured across the loudspeaker load.

3. Vripple =Vripple(max) = 2 V (p-p); fi = 100 Hz; Rs =0 Ω.

4. Vripple =Vripple(max) = 2 V (p-p); fi = 1 kHz; Rs =0 Ω.

5. B = 22 Hz to 22 kHz; Rs =0 Ω.

6. B = 22 Hz to 22 kHz; Rs =10kΩ.

7. B = 22 Hz to 22 kHz; independent of Rs.

8. Vi =Vi(max) = 1 V (RMS).

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

Po

output power

THD = 0.5%

tbf

100

−

W

THD = 10%

tbf

130

−

W

THD = 0.5%; Vp = ±30 V

−

150

−

W

THD = 10%; Vp = ±30 V

−

190

−

W

THD

total harmonic distortion

Po = 1 W; note 1

fi = 1 kHz

−

0.1

0.15

%

fi = 10 kHz

−

0.2

−

%

Gv(cl)

closed loop voltage gain

35

36

37

dB

η

efﬁciency

Po = tbf W; fi = 1 kHz; note 2

tbf

−

%

SVRR

supply voltage ripple rejection

on; note 3

−

66

−

dB

on; note 4

tbf

−−

dB

mute; note 3

−

66

−

dB

standby; note 3

80

−−

dB

Z

i

input impedance

40

60

−

k

Ω

Vn(o)

noise output voltage

on; note 5

−

140

280

µV

on; note 6

−

tbf

−µV

mute; note 7

−

140

−µV

Vo

output signal

mute; note 8

−−

tbf

mV

CMRR

common mode rejection ratio

Vi(CM)(rms) =1V

−

65

−

dB

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