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參數(shù)資料
| 型號： | TB2936HQ |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 26 W, 2 CHANNEL, AUDIO AMPLIFIER, PZFM25 |
| 封裝： | 1 MM PITCH, PLASTIC, HZIP-25 |
| 文件頁數(shù)： | 16/20頁 |
| 文件大?。?/td> | 470K |
| 代理商： | TB2936HQ |
TB2936HQ
2009-02-04
5
3. DC Offset Detection
The purpose of the integrated DC offset detector is to avoid an anomalous DC offset on the outputs,
produced by the input capacitor due to leakage current or short-circuit.
Figure 5 DC Offset Detection Mechanism
Amp output
OUT(-)
VCC/2
GND
Time
GND
Voltage at (A)
(pin 25)
Offset detection
threshold voltage
RS2
Time
Voltage at (B)
(LPF output)
OUT(+)
Vref
Elec. vol
25
5 V
LPF
To a microcontroller
+
V
Negative DC offset (
)
(caused by RS2)
Positive DC offset (
+)
(caused by RS1)
VCC/2 (normal DC voltage)
Leakage current
or short-circuit
Vbias
Vref/2
A
B
R
S2
RS1
The microcontroller shuts down the
system if the output is lower than
the specified voltage.
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