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
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 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)
4.7Ω
OUT (R)
4.7Ω
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 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
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 - 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 -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 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 -1.5 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
Doc ID 1477 Rev 6 5/14
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