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参数资料
| 型号： | TB2936HQ |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 26 W, 2 CHANNEL, AUDIO AMPLIFIER, PZFM25 |
| 封装： | 1 MM PITCH, PLASTIC, HZIP-25 |
| 文件页数： | 15/20页 |
| 文件大小： | 470K |
| 代理商： | TB2936HQ |
TB2936HQ
2009-02-04
4
2. Mute Function (pin 22)
The audio mute function is enabled by setting pin 22 Low. R1 and C4 determine the time constant of the
mute function. The time constant affects pop noise generated when power or the mute function is turned on
or off; thus, it must be determined on a per-application basis. (Refer to Figures 3 and 4.)
The value of the external pull-up resistor is determined, based on pop noise value.
For example, when the control voltage is changed from 5 V to 3.3 V, the pull-up resistor should be:
3.3 V / 5 V
× 47 kΩ = 31 kΩ
Figure 3 Mute Function
Figure 4 Mute Attenuation
VMUTE (V)
22
1 k
Ω
R1
5 V
Mute On/Off
control
C4
0
120
100
80
60
40
20
0
20
0.5
1
1.5
2
2.5
3
VCC = 13.2 V
f
= 1 kHz
RL = 4 Ω
VO = 20dBm
BW
= 400 Hz to 30 kHz
Pin 22 control voltage: VMUTE (V)
ATT – VMUTE
Mute
at
tenua
tion
ATT
(dB
)
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