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參數資料
| 型號： | TS4961TIQT |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 1.5 W, 1 CHANNEL, AUDIO AMPLIFIER, QCC16 |
| 封裝： | 3 X 3 MM, ROHS COMPLIANT, QFN-16 |
| 文件頁數： | 32/49頁 |
| 文件大小： | 1351K |
| 代理商： | TS4961TIQT |
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Application component information
TS4961T
38/49
4.5
Shutdown time (tSTBY)
When the standby command is set, the time required to put the two output stages into high
impedance and to put the internal circuitry in standby mode, is about 5 ms. This time is used
to decrease the gain and avoid any pop noise during shutdown.
4.6
Consumption in standby mode
Between the shutdown pin and GND there is an internal 300 k
Ωresistor. This resistor forces
the TS4961T to switch to standby mode when the standby input is left floating.
However, this resistor also introduces additional power consumption if the standby pin
voltage is not 0 V.
4.7
Single-ended input configuration
The TS4961Tcan be used in a single-ended input configuration, but input coupling
capacitors are necessary. Figure 76 shows a typical single-ended input application.
Figure 76.
Typical single-ended input application
All formulas are identical except for the gain (with Rin in kΩ) :
Due to the internal resistor tolerance, AVsingle is in the range of:
In the event that multiple single-ended inputs are summed, it is important that the
impedance on both TS4961 inputs (In- and In+) be equal.
Rin
GND
Vcc
SPEAKER
Cin
Ve
GND
Standby
In-
Stdby
In+
Out-
Out+
VCCA
12
15
16
7
8
6
5
GNDA
Internal
Bias
PWM
Output
Bridge
H
Oscillator
150k
+
-
300k
TS4961T(Audio Amplifier Part)
Csa
1uF
A
V
gle
sin
V
e
Out
+
Out
-
–
-------------------------------
300
R
in
----------
==
273
R
in
----------
A
V
gle
sin
327
R
in
----------
≤≤
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