TDA8920B datasheet(15/34 Pages) PHILIPS

15 / 34 page

9397 750 13356

Preliminary data sheet

Rev. 01 — 1 October 2004

15 of 34

Philips Semiconductors

TDA8920B

× 100 W class-D power ampliﬁer

12.3 Mono BTL application

[1]

RsL is the series resistance of inductor of low-pass LC ﬁlter in the application.

[2]

Output power is measured indirectly; based on RDSon measurement. See also Section 13.3.

[3]

Total harmonic distortion is measured in a bandwidth of 22 Hz to 20 kHz, using an AES17 20 kHz brickwall ﬁlter. Maximum limit is

guaranteed but may not be 100 % tested.

[4]

Vripple =Vripple(max) = 2 V (p-p); Rs =0 Ω.

[5]

B = 22 Hz to 20 kHz, using an AES17 20 kHz brickwall ﬁlter.

[6]

B = 22 Hz to 20 kHz, using an AES17 20 kHz brickwall ﬁlter; independent of Rs.

[7]

Vi =Vi(max) = 1 V (RMS); fi = 1 kHz.

13. Application information

13.1 BTL application

When using the power ampliﬁer in a mono BTL application the inputs of both channels

must be connected in parallel and the phase of one of the inputs must be inverted (see

Figure 6). In principle the loudspeaker can be connected between the outputs of the two

single-ended demodulation ﬁlters.

Table 10:

Mono BTL application characteristics

VP = ±27 V; RL =8 Ω; fi = 1 kHz; fosc = 317 kHz; RsL < 0.1 Ω [1]; Tamb =25 °C; unless otherwise speciﬁed.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

output power

RL =6 Ω; VP = ±27 V

[2]

THD = 0.5 %

174

THD = 10 %

210

RL =8 Ω; VP = ±27 V

[2]

THD = 0.5 %

138

THD = 10 %

173

THD

total harmonic distortion

Po =1W

[3]

fi = 1 kHz

0.02

0.05

fi = 6 kHz

0.03

Gv(cl)

closed loop voltage gain

SVRR

supply voltage ripple rejection

operating

[4]

fi = 100 Hz

fi = 1 kHz

mute; fi = 100 Hz

[4] -80

standby; fi = 100 Hz

[4] -80

Zi

input impedance

Ω

Vn(o)

noise output voltage

operating

Rs =0 Ω

[5] -

300

µV

mute

[6] -

220

µV

Vo(mute)

output signal in mute

[7] -

200

µV

CMRR

common mode rejection ratio

Vi(CM) = 1 V (RMS)

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