TDA7266M STMicroelectronics, TDA7266M Datasheet - Page 3

• Manufacturer Part Number: TDA7266M
• Description: IC AMP AUDIO 7W MONO MULTIWATT15
• Manufacturer: STMicroelectronics
• Type: Class ABr

Specifications of TDA7266M

• Output Type: 1-Channel (Mono)
• Max Output Power X Channels @ Load: 7W x 1 @ 8 Ohm
• Voltage - Supply: 3 V ~ 18 V
• Features: Mute, Short-Circuit and Thermal Protection, Standby
• Mounting Type: Through Hole
• Package / Case: Multiwatt-15 (Vertical, Bent and Staggered Leads)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ELECTRICAL CHARACTERISTICS (Continued)
APPLICATION SUGGESTION
STAND-BY AND MUTE FUNCTIONS
(A) Microprocessor Application
In order to avoid annoying "Pop-Noise" during
Turn-On/Off transients, it is necessary to guaran-
tee the right St-by and mute signals sequence.
It is quite simple to obtain this function using a mi-
croprocessor (Fig. 1 and 2).
At first St-by signal (from mP) goes high and the
voltage across the St-by terminal (Pin 7) starts to
increase exponentially. The external RC network
is intended to turn-on slowly the biasing circuits of
Figure 1: Microprocessor Application
Symbol
VT
I
ST-BY
e
ST-BY
N
P
St-by Threshold
ST-BY current V6 = GND
Total Output Noise Voltage
ST-BY
MUTE
IN1
Parameter
R1 10K
R2 10K
10 F
1 F
C2
C4
C1 0.22 F
S-GND
4
7
9
6
Vref
A curve
f = 20Hz to 20kHz
Test Condition
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 (C3,
C5) 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.
+
+
-
-
3
V CC
13
1
2
8
Min.
0.8
OUT1+
OUT1-
PW-GND
Typ.
150
1.3
D98AU833A
470 F
C5
Max.
100
1.8
TDA7266M
100nF
C6
Unit
V
A
V
3/9