TDA8920 Datasheet, PDF (8/16 Pages) NXP Semiconductors – 2 x 50 W class-D power amplifier

Philips Semiconductors
2 × 50 W class-D power amplifier
Preliminary specification
TDA8920
AC CHARACTERISTICS
Stereo single-ended application
V_DD = ±25 V; R_L = 8 Ω; f_i = 1 kHz; T_amb = 25 °C; measured in Fig.5; unless otherwise specified.
SYMBOL
P_o
THD
G_v(cl)
η
SVRR
Z_i
V_n(o)
α_cs
∆G_v
V_o
CMRR
PARAMETER
CONDITIONS
output power
THD = 0.5%
THD = 10%
total harmonic distortion
closed loop voltage gain
THD = 0.5%; V_p = ±30 V
THD = 10%; V_p = ±30 V
P_o = 1 W; note 1
f_i = 1 kHz
f_i = 10 kHz
efficiency
supply voltage ripple
rejection
P_o = tbf W; f_i = 1 kHz; note 2
on; note 3
on; note 4
mute; note 3
standby; note 3
input impedance
noise output voltage
on; note 5
on; note 6
mute; note 7
channel separation
note 8
channel unbalance
output signal
mute; note 9
common mode rejection ratio V_i(CM)(rms) = 1 V
MIN.
tbf
tbf
−
−
TYP.
30
35
40
50
MAX.
−
−
−
−
UNIT
W
W
W
W
−
0.1
0.15 %
−
0.2
−
%
29
30
31
dB
85
90
−
%
−
60
−
dB
tbf
tbf
−
dB
−
60
−
dB
−
80
−
dB
80
120
kΩ
−
100
200
µV
−
tbf
−
µV
−
100
−
µV
50
tbf
−
dB
−
−
1
dB
−
−
500
µV
−
65
−
dB
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. V_ripple = V_ripple(max) = 2 V (p-p); f_i = 100 Hz; R_s = 0 Ω.
4. V_ripple = V_ripple(max) = 2 V (p-p); f_i = 1 kHz; R_s = 0 Ω.
5. B = 22 Hz to 22 kHz; R_s = 0 Ω.
6. B = 22 Hz to 22 kHz; R_s = 10 kΩ.
7. B = 22 Hz to 22 kHz; independent of R_s.
8. P_o = tbf W; R_s = 0 Ω.
9. V_i = V_i(max) = 1 V (RMS).
1998 Dec 01
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