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PDF TDA7266D Data sheet ( Hoja de datos )
| Número de pieza | TDA7266D | |
| Descripción | 5W+5W DUAL BRIDGE AMPLIFIER | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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TDA7266D
5W+5W DUAL BRIDGE AMPLIFIER
s WIDE SUPPLY VOLTAGE RANGE (3.5 - 12V)
s OUTPUT POWER
5+5W @THD = 10%, RL = 8Ω, VCC = 9.5V
s SINGLE SUPPLY
s MINIMUM EXTERNAL COMPONENTS
– NO SVR CAPACITOR
– NO BOOTSTRAP
– NO BOUCHEROT CELLS
– INTERNALLY FIXED GAIN
s STAND-BY & MUTE FUNCTIONS
s SHORT CIRCUIT PROTECTION
s THERMAL OVERLOAD PROTECTION
PRELIMINARY DATA
TECHNOLOGY BI20II
PowerSO20 Slug Down
ORDERING NUMBER: TDA7266D
DESCRIPTION
The TDA7266D is a dual bridge amplifier specially
designed for LCD TV/Monitor, PC Motherboard, TV
and Portable Audio applications.
TEST AND APPLICATION CIRCUIT
VCC
R1
JP1 47K
C3 0.22µF
+5V 7
IN1
R2
47K S-GND
13
ST-BY R3 10K
9
C4
10µF
Vref
C5 0.22µF
IN2
14
MUTE R4 10K
8
C6
1µF
1
10
11
PW-GND
20
6 15
C1 C2 C7
470µF 100nF 100nF
+ 2 OUT1+
-
- 5 OUT1-
+
+ 19 OUT2+
-
- 16 OUT2-
+
D02AU1407
May 2003
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
1/13
1 page  
Figure 2. Microprocessor Driving Signals
+VS(V)
+18
VIN
(mV)
VST-BY
pin 9
1.8
1.3
0.8
VMUTE
pin 8
4.1
2.9
2.3
Iq
(mA)
TDA7266D
VOUT
(V)
OFF
ST-BY
MUTE
PLAY
MUTE
ST-BY
OFF
D02AU1411
B) Low Cost Application
In low cost applications where the mP is not present, the suggested circuit is shown in fig.3.
The St-by and mute terminals are tied together and they are connected to the supply line via an external voltage
divider.
The device is switched-on/off from the supply line and the external capacitor C4 is intended to delay the St-by
and mute threshold exceeding, avoiding "Popping" problems.
So to avoid any popping or clicking sond, it is important to clock:
a Correct Sequence: At turn-ON, the Stand-by must be removed at first, then the Mute must be re-
leased after a delay of about 100-200ms. On the contrary at turn-OFF the Mute must be activated
as first and then the Stand-by.
With the values suggested in the Application circuit the right operation is guaranteed.
b Correct Threshold Voltages: In order to avoid that due to the spread in the internal thresholds (see
the above limits) a wrong external voltage causes uncertain commutations for the two functions we
suggest to use the following values:
Mute for Vcc>6.4V
: VT = 2.3V
Mute for Vcc<6.4V
: VT = Vcc/2 - 1
Stand-by
: VT = 0.8V
5/13
5 Page 
Figure 15. Evaluation Board Top Layer Layout
TDA7266D
Figure 16. Evaluation Board Bottom Layer Layout
11/13
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet TDA7266D.PDF ] | |
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