ST TDA7264 User Manual

25 W + 25 W stereo amplifier with mute and standby
Features
Wide supply voltage range (up to ±22.5 V)
Split supply
– 25 W + 25 W into 8
with V
No “pop” at turn on/off
Mute (“pop”-free)
Standby feature (low I
Few external components
Short-circuit protection
Thermal overload protection

Table 1. Device summary

= ±20 V and THD = 10%
S
)
q
TDA7264
Multiwatt8
Description
The TDA7264 is class-AB dual audio power amplifier assembled in a Multiwatt package.
It is specially designed for high-quality sound applications such as hi-fi music centers and stereo TV sets.
Order code Operating temperature Package Packaging
TDA7264 0 to 70 °C Multiwatt8 Tube

Figure 1. Applications circuit

+V
S
15K
1µF
+5V
µP
1µF
1µF
MUTE/ ST-BY
IN (L)
18K15K
IN (R)
D94AU069A
GND
4
6
7
8
+
-
-
+
1000µF
+V
2
5
-V
S
S
3
1
OUT (L)
4.7
OUT (R)
4.7
1000µF
RL (L)
100nF
RL (R)
100nF
July 2009 Doc ID 1477 Rev 6 1/14
www.st.com
14
Pin description TDA7264

1 Pin description

Figure 2. Pin connection (top view)

Tab connected to pin 5
8
7
6
5
4
3
2
1
D94AU096
IN (1)
GND
IN (2)
-V
S
MUTE/ST-BY
OUTPUT (2)
+V
S
OUTPUT (1)
2/14 Doc ID 1477 Rev 6
TDA7264 Electrical specifications

2 Electrical specifications

2.1 Absolute maximum ratings

Table 2. Absolute maximum ratings

Symbol Parameter Value Unit
V
S
I
O
P
tot
T
op
T
j
T
stg
DC supply voltage ±25 V
Output Peak Current (internally limited) 4.5 A
power Dissipation T
= 70°C 30 W
case
Operating temperature -20 to 85 °C
Junction temperature -40 to 150 °C
Storage temperature -40 to 150 °C

2.2 Thermal data

Table 3. Thermal data

Symbol Parameter Min Typ Max Unit
R
th j-case
Thermal resistance, junction to case - - 2 °C/W

2.3 Electrical specifications

Unless otherwise stated, the results in Ta bl e 4 below are given for the conditions: V
=±20V, RL (load) = 8 , RS (source) = 50 Ω, f = 1 kHz, and T
S
applications circuit in Figure 12 on page 9.

Table 4. Electrical specifications

= 25° C. See also the
amb
Symbol Parameter Conditions Min Typ Max Unit
V
S
I
q
P
OM
Supply voltage range - ±5 - ±22.5 V
Total quiescent current - - 80 130 mA
Music output power
(1)
THD = 10%,
= 8 Ω, VS= ±22.5 V
R
L
-32-W
THD = 10%:
= 8 Ω, VS = ±20 V
R
L
20
RL = 4 Ω, VS = ±16 V
P
O
Output power
THD = 1%:
= 8 Ω, VS = ±20 V
R
L
RL = 4 Ω, VS = ±16 V
-
25 25
20 20
-
W
-
Doc ID 1477 Rev 6 3/14
Electrical specifications TDA7264
Table 4. Electrical specifications (continued)
Symbol Parameter Conditions Min Typ Max Unit
THD Total harmonic distortion
PO= 1 W, f = 1 kHz,
= 8 Ω, VS = ±20 V,
R
L
= 0.1 to 15 W,
P
O
f = 100 Hz to 15 kHz,
= 8 Ω, VS = ±20 V
R
L
P
= 1 W, f = 1 kHz,
O
RL = 4 Ω, VS = ±16 V,
P
= 0.1 to 12 W,
O
f = 100 Hz to 15 kHz,
-0.02-
--0.5
%
-0.03-
--1.0
RL = 4 Ω, VS = ±16 V
C
T
Crosstalk
f = 1 kHz f = 10 kHz
70
-
-dB
60
SR Slew rate - - 10 - V/µs
G
V
G
V
eN Total input noise
R
i
SVRR Supply voltage rejection ratio f
T
j
Closed-loop voltage gain - 29 30 31 dB
Voltage gain matching - - 0.2 - dB
A curve f = 20 Hz to 22 kHz
-
2.5
-
3.58-
µV
Input resistance - 15 20 - k
= 100 Hz, Vr = 0.5 V - 60 - dB
r
Junction temperature at thermal shut-down
- - 145 - °C
Mute mode (see also Table 5 on page 8)
VT
A
MUTE
MUTE
Mute/play threshold - -7 -6 -5 V
Mute attenuation - 60 90 - dB
Standby mode (see also Table 5 on page 8)
VT
STBY
A
STBY
I
q_STBY
1. FULL POWER up to VS = ±22.5 V with RL = 8 and VS = ±16 V with RL = 4 Ω. MUSIC POWER is the maximum power which the amplifier is capable of producing across the rated load resistance (regardless of non-linearity) 1 s after the application of a sinusoidal input signal of frequency 1kHz.
Standby/mute threshold - -3.5 -2.5 -1.5 V
Standby attenuation - - 110 - dB
Quiescent current in standby - - 3 - mA
4/14 Doc ID 1477 Rev 6
TDA7264 Characterization curves

3 Characterization curves

Figure 3. Quiescent current vs Supply Voltage

Figure 4. Frequency response

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Characterization curves TDA7264

Figure 5. Output power vs supply voltage

Figure 6. Distortion vs output power

Figure 7. Crosstalk vs frequency

6/14 Doc ID 1477 Rev 6
TDA7264 Characterization curves

Figure 8. SVRR vs frequency

Figure 9. Attenuation and quiescent current vs voltage on pin 4

Figure 10. Power dissipation vs output power

Doc ID 1477 Rev 6 7/14
Mute and standby modes TDA7264

4 Mute and standby modes

Pin 4 (MUTE/STANDBY) controls the amplifier status by two different thresholds referenced to +V
as given in Tab le 5 below. See also Table 4: Electrical specifications on page 3.
S

Table 5. Mute and standby thresholds on pin 5

Nominal voltage on pin 4,
V
PIN4
Mode Remarks
> +VS - 2.5 V Standby Output stages turned off
> +V
- 6.0 V, < +VS - 2.5 V Mute Output stages turned on, amplifiers muted
S
- 6.0 V Play Amplifiers active
< +V
S

Figure 11. Mute and standby thresholds on pin 4

+V
S
(V)
20
t
-V
S
-20
V
IN
(mV)
Vpin4
(V)
V
S
VS-2.5
V
6
S-
V
-10
S
I
q
(mA)
0
VOUT
(V)
OFF
STDBY
MUTE
D94AU084
8/14 Doc ID 1477 Rev 6
PLAY STDBY PLAY OFF
STDBY
MUTE
MUTE
MUTE
TDA7264 Applications information

5 Applications information

Figure 12. Schematic of demo board

+V
S
R2
B
A
R1
SW1
ST-BY
SW1 SW2 Mode
AAStandby
AB Standby
BBMute
BAPlay
DZ
15KC31µF
Q1
R4
15K
A
B
SW2
MUTE
C1 1µF
C2 1µF
MUTE/ ST-BY
IN (L)
R3
18K
IN (R)
D94AU068B
GND
4
6
7
8

Figure 13. Component layout of demo-board

+
-
-
+
C7
100nF
+V
2
5
-V
C5
100nF
RL (L)
RL (R)
OUT (L)
4.7
OUT (R)
4.7
C4
1000µF
R5
C8
100nF
R6
C9
100nF
S
3
1
S
C6
1000µF
Doc ID 1477 Rev 6 9/14
Applications information TDA7264

Table 6. Recommended component values for demo board

Component
Recommended
value
Purpose
R1 10 k Mute circuit
R2 15 k Mute circuit
R3 18 k Mute circuit
R4 15 k Mute circuit
Larger than
recommended
value
Decrease in DZ biasing current
shifted
V
PIN4
downwards
V
shifted
PIN4
upwards
shifted
V
PIN4
upwards
Smaller than
recommended
value
-
V
shifted
PIN4
upwards
V
shifted
PIN4
downwards
V
shifted
PIN4
downwards
R5, R6 4.7 Frequency stability Danger of oscillation Danger of oscillation
C1, C2 1 µF Input AC coupling -
C3 1 µF
C4, C6 1000 µF
C5, C7 0.1 µF
Standby/mute time constant
Supply voltage decoupling
Supply voltage decoupling
Longer on/off time Shorter on/off time
- Danger of oscillation
- Danger of oscillation
Higher low­frequency cutoff
C8, C9 0.1 µF Frequency stability - -
Dz 5.1 V Mute circuit - -
Q1 BC107 Mute circuit - -
10/14 Doc ID 1477 Rev 6
TDA7264 Package mechanical data

6 Package mechanical data

The TDA7264 comes in a 8-pin Multiwatt package with pin 5 internally connected to the metal tab.

Figure 14. Multiwatt8 outline drawing

ECOPACK specifications, grade definitions and product status are available at: www.st.com. ECOPACK
In order to meet environmental requirements, ST offers these devices in different grades of
®
packages, depending on their level of environmental compliance. ECOPACK®
®
is an ST trademark.
Doc ID 1477 Rev 6 11/14
Package mechanical data TDA7264

Table 7. Multiwatt8 package dimensions

Dimensions in mm Dimensions in inches
Reference
Min Typ Max Min Typ Max
A --5.00--0.197
B --2.65--0.104
C --1.60--0.063
E 0.49 - 0.55 0.019 - 0.22
F 0.78 - 0.85 0.031 - 0.033
G 2.40 2.54 2.68 0.094 0.100 0.106
G1 17.64 17.78 17.92 0.694 0.700 0.706
H1 19.60 - - 0.772 - -
H2 - - 20.20 - - 0.787
L 20.35 - 20.65 0.801 - 0.813
L2 17.05 17.20 17.35 0.671 0.677 0.683
L3 17.25 17.50 17.75 0.679 0.689 0.699
L4 10.30 10.70 10.90 0.406 0.421 0.429
L7 2.65 - 2.90 0.104 - 0.114
N --- ---
N1 --- ---
P --- ---
Q --- ---
R1 --- ---
S 1.90 - 2.60 0.075 - 0.102
S1 1.90 - 2.60 0.075 - 0.102
U 0.40 - 0.55 0.016 - 0.022
V - 5 deg - - 5 deg -
Z 0.70 - 0.85 - - 0.033
Diam.1 3.65 - 3.85 0.144 - 0.152
Diam.2 --- ---
12/14 Doc ID 1477 Rev 6
TDA7264 Revision history

7 Revision history

Table 8. Document revision history

Date Revision Changes
Jan-2004 5 First issue in EDOCS
01-Jul-2009 6 Removed references to TDA7264A
Doc ID 1477 Rev 6 13/14
TDA7264
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14/14 Doc ID 1477 Rev 6
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