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E-TDA7566

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P29
Electrical specifications TDA7566
10/29 Doc ID 9801 Rev 6
3.4 Electrical characteristics curves
Figure 4. Quiescent current vs. supply
voltage
Figure 5. Output power vs. supply voltage
(4 )
Figure 6. Output power vs. supply voltage
(2 )
Figure 7. Distortion vs. output power (4 )
Figure 8. Distortion vs. output power (2 ) Figure 9. Distortion vs. frequency (4 )
8 1012141618
Vs
(
V
)
50
70
90
110
130
150
170
190
210
230
250
Id (mA)
Vin = 0
NO LOADS
8 9 10 11 12 13 14 15 16 17 18
Vs
V
5
10
15
20
25
30
35
40
45
50
55
60
65
70
Po (W)
RL = 4 Ohm
f = 1 KHz
THD= 10 %
Po-max
THD= 1 %
8 9 10 11 12 13 14 15 16
Vs
(
V
)
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
Po (W)
RL = 2 Ohm
f = 1 KHz
THD= 10 %
Po-max
THD= 1 %
0.1 1 10
Po
(
W
)
0.01
0.1
1
10
THD (%)
f = 10 KHz
Vs = 14.4 V
RL = 4 Ohm
f = 1 KHz
0.1 1 10
Po
(
W
)
0.01
0.1
1
10
THD (%)
f = 10 KHz
Vs = 14.4 V
RL = 2 Ohm
f = 1 KHz
0.01
10 100 1000 10000
f
(
Hz
)
0.1
1
10
THD (%)
Vs = 14.4 V
RL = 4 Ohm
Po = 4 W
TDA7566 Electrical specifications
Doc ID 9801 Rev 6 11/29
Figure 10. Distortion vs. frequency (2 ) Figure 11. Crosstalk vs. frequency
Figure 12. Supply voltage rejection vs.
frequency
Figure 13.
Power dissipation and efficiency vs.
output power (4
, Sine)
Figure 14.
Power dissipation vs. average output
power (audio program simulation, 4
)
Figure 15.
Power dissipation vs. average output
power (audio program simulation, 2
)
10 100 1000 10000
f
(
Hz
)
0.01
0.1
1
10
THD (%)
Vs = 14.4 V
RL = 2 Ohm
Po = 8 W
10 100 1000 10000
f
(
Hz
)
20
30
40
50
60
70
80
90
CROSSTALK (dB)
Vs = 14.4 V
RL = 4 Ohm
Po = 4 W
Rg = 600 Ohm
10 100 1000 10000
f
(
Hz
)
20
30
40
50
60
70
80
90
SVR (dB)
Rg = 600 Ohm
Vripple = 1 Vpk
0 2 4 6 8 101214161820222426
Po
(
W
)
0
10
20
30
40
50
60
70
80
90
Ptot (W)
0
10
20
30
40
50
60
70
80
90
n (%)
n
Ptot
Vs = 14.4 V
RL = 4x4 Ohm
f= 1 KHz SINE
012345
Po
(
W
)
5
10
15
20
25
30
35
40
45
Ptot (W)
CLIP
START
Vs = 14.4 V
RL = 4x4 Ohm
GAUSSIAN NOISE
012345678
Po
(
W
)
0
10
20
30
40
50
60
70
80
90
Ptot (W)
Vs = 14.4 V
RL = 4x2 Ohm
GAUSSIAN NOISE
CLIP
START
Diagnostics functional description TDA7566
12/29 Doc ID 9801 Rev 6
4 Diagnostics functional description
4.1 Turn-on diagnostic
It is activated at the turn-on (standby out) under I
2
C bus request. Detectable output faults
are:
– Short to GND
–Short to V
S
– Short across the speaker
– Open speaker
To verify if any of the above misconnections are in place, a subsonic (inaudible) current
pulse (Figure 16) is internally generated, sent through the speaker(s) and sunk back.The
Turn On diagnostic status is internally stored until a successive diagnostic pulse is
requested (after a I
2
C reading).
If the "standby out" and "diag. enable" commands are both given through a single
programming step, the pulse takes place first (power stage still in standby mode, low,
outputs = high impedance).
Afterwards, when the Amplifier is biased, the PERMANENT diagnostic takes place. The
previous Turn On state is kept until a short appears at the outputs.
Figure 16. Turn-on diagnostic: working principle
Figure 17 and 18 show SVR and output waveforms at the turn-on (standby out) with and
without Turn-on diagnostic.
CH-
CH+
Isource
Vs~5V
Isink
t (ms)
I (mA)
Isink
Isource
~100ms
Measure time
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P29

E-TDA7566

Mfr. #:
Buy E-TDA7566
Manufacturer:
STMicroelectronics
Description:
Audio Amplifiers 4 X 45 W quad Bridge Radio Amp
Lifecycle:
New from this manufacturer.
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