ST TDA7566 User Manual
4 x 40 W multifunction quad power amplifier
Features
■ DMOS power output
■ High output power capability 4 x 25 W/4 Ω @
14.4 V, 1 kHz, 10 % THD, 4 x 40 W max. power
■ Max. output power 4 x 60 W/2 Ω
■ Full I
■ Full fault protection
■ DC offset detection
■ Four independent short circuit protection
■ Clipping detector pin with selectable threshold
■ ESD protection
Description
The TDA7566 is a new BCD technology quad
bridge type of car radio amplifier in Flexiwatt25
package specially intended for car radio
applications.
Table 1. Device summary
2
C bus driving:
– Standby
– Independent front/rear soft play/mute
– Selectable gain 26 dB - 12 dB
2
–I
C bus digital diagnostics
(1%, 10%)
TDA7566
with built-in diagnostics features
Flexiwatt25
Thanks to the DMOS output stage the TDA7566
has a very low distortion allowing a clear powerful
sound.
This device is equipped with a full diagnostics
array that communicates the status of each
speaker through the I
The possibility to control the configuration and
behavior of the device by means of the I
makes TDA7566 a very flexible product.
2
C bus.
2
C bus
Order code Package Packing
E-TDA7566 Flexiwatt25 Tube
TDA7566
1. Obsolete product.
October 2010 Doc ID 9801 Rev 5 1/29
(1)
Flexiwatt25 Tube
www.st.com
1
Contents TDA7566
Contents
1 Block diagram and application and test circuit . . . . . . . . . . . . . . . . . . . 5
1.1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2 Application and test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.4 Electrical characteristics curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4 Diagnostics functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.1 Turn-on diagnostic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.2 Permanent diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.3 Output DC offset detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.4 AC diagnostic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.5 Multiple faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.6 Faults availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.7 I2C programming/reading sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5 I2C bus interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.1 Data validity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.2 Start and stop conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.3 Byte format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.4 Acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6 Software specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
7 Examples of bytes sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
8 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
2/29 Doc ID 9801Rev 5
TDA7566 List of tables
List of tables
Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table 2. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 3. Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 4. Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 5. Double fault table for turn-on diagnostic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Table 6. IB1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Table 7. IB2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Table 8. DB1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Table 9. DB2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 10. DB3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 11. DB4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Table 12. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Doc ID 9801Rev 5 3/29
List of figures TDA7566
List of figures
Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 2. Application and test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 3. Pin connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 4. Quiescent current vs. supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 5. Output power vs. supply voltage (4 Ω) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 6. Output power vs. supply voltage (2 Ω) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 7. Distortion vs. output power (4 Ω) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 8. Distortion vs. output power (2 Ω) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 9. Distortion vs. frequency (4 Ω) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 10. Distortion vs. frequency (2 Ω) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 11. Crosstalk vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 12. Supply voltage rejection vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 13. Power dissipation and efficiency vs. output power (4 W, Sine) . . . . . . . . . . . . . . . . . . . . . 11
Figure 14. Power dissipation vs. average output power (audio program simulation, 4 W) . . . . . . . . . 11
Figure 15. Power dissipation vs. average output power (audio program simulation, 2 W) . . . . . . . . . 11
Figure 16. Turn - on diagnostic: working principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 17. SVR and output behavior (case 1: without turn-on diagnostic). . . . . . . . . . . . . . . . . . . . . . 13
Figure 18. SVR and output pin behavior (case 2: with turn-on diagnostic) . . . . . . . . . . . . . . . . . . . . . 13
Figure 19. Thresholds for short to GND/V
Figure 20. Thresholds for short across the speaker/open speaker . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 21. Thresholds for line-drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 22. Restart timing without diagnostic enable (Permanent) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 23. Restart timing with diagnostic enable (Permanent) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 24. Current detection: load impedance magnitude |Z| vs. output peak voltage of the sinus. . . 16
Figure 25. Data validity on the I
Figure 26. Timing diagram on the I
Figure 27. Timing acknowledge clock pulse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 28. Flexiwatt25 mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
2
C bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2
C bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
S
4/29 Doc ID 9801Rev 5
TDA7566 Block diagram and application and test circuit
1 Block diagram and application and test circuit
1.1 Block diagram
Figure 1. Block diagram
V
DATA CD_OUTCLK
CC1VCC2
IN RF
IN RR
IN LF
IN LR
REFERENCE
F
R
F
R
SVR RF RR LF LR TAB S_GNDAC_GND
D00AU1229
PROTECTION
& DUMP
MUTE1
1.2 Application and test circuit
I2C BUSTHERMAL
MUTE2
12/26dB
12/26dB
12/26dB
12/26dB
CLIP
DETECTOR
SHORT CIRCUIT
PROTECTION &
DIAGNOSTIC
SHORT CIRCUIT
PROTECTION &
DIAGNOSTIC
SHORT CIRCUIT
PROTECTION &
DIAGNOSTIC
SHORT CIRCUIT
PROTECTION &
DIAGNOSTIC
PW_GND
OUT RF+
OUT RF-
OUT RR+
OUT RR-
OUT LF+
OUT LF-
OUT LR+
OUT LR-
Figure 2. Application and test circuit
C8
0.1μFC73300μF
I2C BUS
DATA
CLK
C1 0.22μF
IN RF
C2 0.22μF
IN RR
C3 0.22μF
IN LF
C4 0.22μF
IN LR
25
22
15
14
11
12
S-GND
13
16 10 4
C5
1μFC610μF
Doc ID 9801Rev 5 5/29
Vcc1
620
Vcc2
CD OUT
47K
+
17
18
19
+
21
24
23
+
9
8
7
+
5
2
3
-
TAB
1
OUT RF
OUT RR
OUT LF
OUT LR
V
D00AU1212
Pin description TDA7566
2 Pin description
Figure 3. Pin connection (top view)
25
24
23
22
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
4
3
2
1
DATA
PW_GND RR
OUT RR-
CK
OUT RR+
V
CC2
OUT RF-
PW_GND RF
OUT RF+
AC GND
IN RF
IN RR
S GND
IN LR
IN LF
SVR
OUT LF+
PW_GND LF
OUT LF-
V
CC1
OUT LR+
CD-OUT
OUT LR-
PW_GND LR
TAB
D99AU1037
6/29 Doc ID 9801Rev 5
TDA7566 Electrical specifications
3 Electrical specifications
3.1 Absolute maximum ratings
Table 2. Absolute maximum ratings
Symbol Parameter Value Unit
V
V
T
V
V
peak
V
DATA
I
I
P
stg
Operating supply voltage 18 V
op
DC supply voltage 28 V
S
Peak supply voltage (for t = 50 ms) 50 V
CK pin voltage 6 V
CK
Data pin voltage 6 V
Output peak current (not repetitive t = 100 μs) 8 A
O
Output peak current (repetitive f > 10 Hz) 6 A
O
Power dissipation T
tot
= 70 °C 85 W
case
, TjStorage and junction temperature -55 to 150 °C
3.2 Thermal data
Table 3. Thermal data
Symbol Description Value Unit
R
th j-case
Thermal resistance junction-to-case Max. 1 °C/W
3.3 Electrical characteristics
Table 4. Electrical characteristics
(Refer to the test circuit, VS = 14.4 V; RL = 4 Ω; f = 1 kHz; GV = 26 dB; T
= 25 °C; unless
amb
otherwise specified.)
Symbol Parameter Test condition Min. Typ. Max. Unit
Power amplifier
V
Supply voltage range - 8 - 18 V
S
I
Total quiescent drain current - - 150 300 mA
d
Max. (VS = 14.4 V) 35 40 - W
P
O
Output power
THD = 10 %
THD = 1 %
= 2 Ω; EIAJ (VS = 13.7 V)
R
L
= 2 Ω; THD 10 %
R
L
= 2 Ω; THD 1 %
R
L
R
= 2 Ω; MAX POWER
L
Doc ID 9801Rev 5 7/29
22
16
50
32
25
55
25
20
55
38
30
60
-
-
W
W
W
W
W
W
Electrical specifications TDA7566
Table 4. Electrical characteristics (continued)
(Refer to the test circuit, VS = 14.4 V; RL = 4 Ω; f = 1 kHz; GV = 26 dB; T
= 25 °C; unless
amb
otherwise specified.)
Symbol Parameter Test condition Min. Typ. Max. Unit
P
= 1 W to 10 W - 0.04 0.1 %
O
THD Total harmonic distortion
C
Cross talk f = 1 kHz to 10 kHz, RG = 600 W 50 60 - dB
T
R
G
ΔG
G
E
E
Input impedance - 60 100 130 KΩ
IN
Voltage gain 1 - 25 26 27 dB
V1
Voltage gain match 1 - -1 0 1 dB
V1
Voltage gain 2 - - 12 - dB
V2
Output noise voltage 1 Rg = 600 Ω; 20 Hz to 22 kHz - 35 100 μV
IN1
Output noise voltage 2
IN2
SVR Supply voltage rejection
BW Power bandwidth - 100 - - KHz
= 12 dB;
G
V
= 0.1 to 5 V
V
O
R
= 600 Ω;
g
= 12 dB; 20 Hz to 22 kHz
G
V
RMS
f = 100 Hz to 10 kHz; V
= 600 Ω
R
g
= 1V pk;
r
- 0.02 0.05 %
-12-μV
50 60 - dB
A
V
V
T
T
CD
CD
Standby attenuation - 90 110 - dB
SB
Standby current - - 25 100 μA
I
SB
Mute attenuation - 80 100 - dB
A
M
Offset voltage Mute and Play -100 0 100 mV
OS
Min. supply voltage threshold - 7 7.5 8 V
AM
Turn on delay D2/D1 (IB1) 0 to 1 - 20 50 ms
ON
Turn off delay D2/D1 (IB1) 1 to 0 - 20 50 ms
OFF
Clip det high leakage current CD off - 0 15 μA
LK
Clip det sat. voltage CD on; ICD = 1mA - - 300 mV
SAT
D0 (IB1) = 0 0 1 2 %
CD
Clip det THD level
THD
D0 (IB1) = 1 5 10 15 %
Turn on diagnostics 1 (Power amplifier mode)
Short to GND det. (below this
Pgnd
limit, the Output is considered in
Short Circuit to GND)
Short to Vs det. (above this limit,
Pvs
the Output is considered in Short
Circuit to VS)
Power amplifier in standby
Normal operation
Pnop
thresholds.(Within these limits,
the Output is considered without
faults).
--1.2V
Vs -1.2 - - V
1.8 - Vs -1.8 V
8/29 Doc ID 9801Rev 5
TDA7566 Electrical specifications
Table 4. Electrical characteristics (continued)
(Refer to the test circuit, VS = 14.4 V; RL = 4 Ω; f = 1 kHz; GV = 26 dB; T
= 25 °C; unless
amb
otherwise specified.)
Symbol Parameter Test condition Min. Typ. Max. Unit
Lsc Shorted load det. - - - 0.5 Ω
Lop Open load det. - 85 - - Ω
Lnop Normal load det. - 1.65 - 45 Ω
Turn on diagnostics 2 (Line driver mode)
Short to GND det. (below this
Pgnd
Pvs
Pnop
Lsc Shorted load det. - - - 2 Ω
Lop Open load det. - 330 - - Ω
limit, the Output is considered in
Short Circuit to GND)
Short to Vs det. (above this limit,
the Output is considered in Short
Circuit to VS)
Normal operation thresholds.
(Within these limits, the Output is
considered without faults).
Power amplifier in standby
--1.2V
Vs -1.2 - - V
1.8 - Vs -1.8 V
Lnop Normal load det. - 7 - 180 Ω
Permanent diagnostics 2 (Power amplifier mode or line driver mode)
Pgnd
Short to GND det. (below this
limit, the Output is considered in
Short Circuit to GND)
Power amplifier in Mute or Play,
one or more short circuits
protection activated
--1.2V
Short to Vs det. (above this limit,
Pvs
the Output is considered in Short
- Vs -1.2 - - V
Circuit to VS)
Normal operation
Pnop
thresholds.(Within these limits,
the Output is considered without
- 1.8 - Vs -1.8 V
faults).
Power amplifier mode - - 0.5 Ω
L
2
I
C bus interface
f
V
Shorter Load det.
SC
V
Offset Detection
O
I
Normal load current detection
NL
Open load current detection - - 250 mA
I
OL
Clock frequency - - 400 - KHz
SCL
V
Input low voltage - - - 1.5 V
IL
Input high voltage - 2.3 - - V
IH
Line driver mode - - 2 Ω
Power amplifier in play, AC Input
signals = 0
1.522.5V
500 - - mA
VO < (VS - 5)pk
Doc ID 9801Rev 5 9/29
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