25 W + 25 W stereo amplifier with mute and standby
Features
Wide supply voltage range (up to ±22.5 V)
Split supply
High output power
– 25 W + 25 W into 8 Ω
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 codeOperating temperaturePackagePackaging
TDA72640 to 70 °CMultiwatt8 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)
4.7Ω
OUT (R)
4.7Ω
1000µF
RL (L)
100nF
RL (R)
100nF
July 2009Doc ID 1477 Rev 61/14
www.st.com
14
Pin descriptionTDA7264
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
TDA7264Electrical specifications
2 Electrical specifications
2.1 Absolute maximum ratings
Table 2.Absolute maximum ratings
SymbolParameterValueUnit
V
S
I
O
P
tot
T
op
T
j
T
stg
DC supply voltage±25V
Output Peak Current (internally limited)4.5A
power Dissipation T
= 70°C30W
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
SymbolParameterMinTypMaxUnit
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 Ω, 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
SymbolParameterConditionsMinTypMaxUnit
V
S
I
q
P
OM
Supply voltage range-±5-±22.5 V
Total quiescent current--80130mA
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 63/14
Electrical specificationsTDA7264
Table 4.Electrical specifications (continued)
SymbolParameterConditionsMinTypMaxUnit
THDTotal 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
SRSlew rate--10-V/µs
G
V
∆G
V
eNTotal input noise
R
i
SVRRSupply voltage rejection ratiof
T
j
Closed-loop voltage gain-293031dB
Voltage gain matching--0.2-dB
A curve
f = 20 Hz to 22 kHz
-
2.5
-
3.58-
µV
Input resistance-1520-kΩ
= 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--7-6-5V
Mute attenuation-6090-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 Ω 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--3.5-2.5-1.5V
Standby attenuation--110-dB
Quiescent current in standby--3-mA
4/14 Doc ID 1477 Rev 6
TDA7264Characterization curves
3 Characterization curves
Figure 3.Quiescent current vs Supply Voltage
Figure 4.Frequency response
Doc ID 1477 Rev 65/14
Characterization curvesTDA7264
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
TDA7264Characterization 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 67/14
Mute and standby modesTDA7264
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.
Table 6.Recommended component values for demo board
Component
Recommended
value
Purpose
R110 kΩMute circuit
R215 kΩMute circuit
R318 kΩMute circuit
R415 kΩMute 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, R64.7 ΩFrequency stabilityDanger of oscillationDanger of oscillation
C1, C21 µFInput AC coupling-
C31 µF
C4, C61000 µF
C5, C70.1 µF
Standby/mute time
constant
Supply voltage
decoupling
Supply voltage
decoupling
Longer on/off timeShorter on/off time
-Danger of oscillation
-Danger of oscillation
Higher lowfrequency cutoff
C8, C90.1 µFFrequency stability--
Dz5.1 VMute circuit--
Q1BC107Mute circuit--
10/14 Doc ID 1477 Rev 6
TDA7264Package 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 611/14
Package mechanical dataTDA7264
Table 7.Multiwatt8 package dimensions
Dimensions in mmDimensions in inches
Reference
MinTypMaxMinTypMax
A--5.00--0.197
B--2.65--0.104
C--1.60--0.063
E0.49-0.550.019-0.22
F0.78-0.850.031-0.033
G2.402.542.680.0940.1000.106
G117.6417.7817.920.6940.7000.706
H119.60--0.772--
H2--20.20--0.787
L20.35-20.650.801-0.813
L217.0517.2017.350.6710.6770.683
L317.2517.5017.750.6790.6890.699
L410.3010.7010.900.4060.4210.429
L72.65-2.900.104-0.114
N--- ---
N1--- ---
P--- ---
Q--- ---
R1--- ---
S1.90-2.600.075-0.102
S11.90-2.600.075-0.102
U0.40-0.550.016-0.022
V-5 deg--5 deg-
Z0.70-0.85--0.033
Diam.13.65-3.850.144-0.152
Diam.2--- ---
12/14 Doc ID 1477 Rev 6
TDA7264Revision history
7 Revision history
Table 8.Document revision history
DateRevisionChanges
Jan-20045First issue in EDOCS
01-Jul-20096Removed references to TDA7264A
Doc ID 1477 Rev 613/14
TDA7264
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