TDA7266L-J15-D-T UTC [Unisonic Technologies], TDA7266L-J15-D-T Datasheet - Page 5

• Manufacturer Part Number: TDA7266L-J15-D-T
• Description: 7+7W DUAL BRIDGE AMPLIFIER
• Manufacturer: UTC [Unisonic Technologies]

TDA7266
For Microprocessor Application
and MUTE signals sequence. It is quite simple to obtain this function using a microprocessor (Fig 1 and Fig 2).
exponentially. The external RC network is intended to turn-on slowly the biasing circuits of the amplifier, this to
avoid ”POP” and ”CLICK” on the outputs.
series to the input terminals (C3, C5) start to charge.
goes in play mode causing a loud “Pop Noise” on the speakers.
In order to avoid annoying ”Pop-Noise” during Turn-On/Off transients, it is necessary to guarantee the right ST-BY
At first ST-BY signal (from mP) goes high and the voltage across the ST-BY terminal (Pin 7) starts to increase
When this voltage reaches the ST-BY threshold level, the amplifier is switched-on and the external capacitors in
It’s necessary to maintain the mute signal low until the capacitors are fully charged, this to avoid that the device
A delay of 100 ~ 200ms between ST-BY and MUTE signals is suitable for a proper operation.
APPLICATION SUGGESTION
µP
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
ST-BY
MUTE
IN2
IN1
0.22µF
0.22µF
10k
10k
R1
R2
C1
C3
Fig. 1 Microprocessor Application
PW-GND
S-GND
C2
10µF
C4
1µF
12
4
9
8
7
6
TDA7266
3
Vcc
LINEAR INTEGRATED CIRCUIT
13
15
14 OUT2-
1
2
OUT1+
OUT1-
OUT2+
C5
470µF
C6
100nF
QW-R107-037,C
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