TDA7266D STMicroelectronics, TDA7266D Datasheet - Page 4

• Manufacturer Part Number: TDA7266D
• Description: IC AMP AUDIO 5W STER POWERSO20
• Manufacturer: STMicroelectronics
• Type: Class ABr

Specifications of TDA7266D

• Output Type: 2-Channel (Stereo)
• Max Output Power X Channels @ Load: 5W x 2 @ 8 Ohm
• Voltage - Supply: 3.5 V ~ 12 V
• Features: Mute, Short-Circuit and Thermal Protection, Standby
• Mounting Type: Surface Mount
• Package / Case: PowerSO-20 Exposed Bottom Pad
• No. Of Channels: 2
• Output Power: 5W
• Supply Voltage Range: 3.5V To 12V
• Thd + N: 0.05% @ 1W, 8ohm, VCC=9.5V
• Load Impedance: 8ohm
• Operating Temperature Range: 0°C To +70°C
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-4024-5; Q2035810; TDA7266D

TDA7266D
APPLICATIVE SUGGESTIONS
STAND-BY AND MUTE FUNCTIONS
(A) Microprocessor Application
In order to avoid annoying "Pop-Noise" during Turn-On/Off transients, it is necessary to guarantee the right St-
by and mute signals sequence.It is quite simple to obtain this function using a microprocessor (Fig. 1 and 2).
At first St-by signal (from P) goes high and the voltage across the St-by terminal (Pin 9) starts to increase ex-
ponentially. 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.
When this voltage reaches the St-by threshold level, the amplifier is switched-on and the external capacitors in
series to the input terminals (C1, C3) start to charge.
It's necessary to mantain the mute signal low until the capacitors are fully charged, this to avoid that the device
goes in play mode causing a loud "Pop Noise" on the speakers.
A delay of 100-200ms between St-by and mute signals is suitable for a proper operation.
Figure 1. Microprocessor Application
4/13
P
ST-BY
MUTE
IN1
IN2
PW-GND
R1 10K
R2 10K
10 F
1 F
C2
C4
C1 0.22 F
C3 0.22 F
S-GND
7
9
13
14
8
1
10
11
20
Vref
+
+
+
+
-
-
-
-
6
V CC
15
19
16
2
5
OUT1+
OUT1-
OUT2+
OUT2-
D02AU1409
470 F
C5
100nF
C6