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參數(shù)資料
| 型號： | TA2170FTG |
| 廠商： | Toshiba Corporation |
| 英文描述： | Low Current Consumption Headphone Amplifier (Built-in input selector) |
| 中文描述： | 低電流消耗耳機(jī)放大器（內(nèi)置輸入選擇器） |
| 文件頁數(shù)： | 7/12頁 |
| 文件大?。?/td> | 233K |
| 代理商： | TA2170FTG |
TA2170FTG
2006-04-19
7
3. Adjustment of DC output voltage
Please perform the OUT ADJ pin (pin 24) as follows by the power supply of V
CC1
and V
CC2
.
If a boost voltage is applied to V
CC1
, V
CC2
is connected to a battery and the difference between V
CC1
and V
CC2
is greater than or equal to 0.7 V, short pins 23 and 24 together. In this case the DC output
voltage
will be
2
V
CC2
.
If the difference between V
CC1
and V
CC2
is less than 0.7 V, or if V
CC1
and V
CC2
are connected to the
same power supply, leave pin 24 open.
In these cases the DC output voltage will be
2
V
0.7
V
CC2
.
4. Switch
(1)
Timing chart
Refer to Fig. 2 for the IC timing chart.
(2)
PW SW
The device is ON when this pin is set to High. To prevent the IC being turned ON by external noise, it
is necessary to connect an external pull-down resistor to the PW SW pin. The pin is highly sensitive.
Mute smoothing
The resistor is connected to a mute pin less than 100 k
When larger than this, the switch circuit doesn’t operate normally.
(3)
200 ms
100 ms
OFF
ON
ON
OFF
ON
OFF
OUT
MUTE
ALL MUTE
PW SW
Figure 2 Timing chart
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