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參數(shù)資料
| 型號： | TA2152FNG |
| 廠商： | Toshiba Corporation |
| 英文描述： | Low Current Consumption Headphone Amplifier (for 1.5-V/3-V Use) |
| 中文描述： | 低電流消耗耳機放大器（用于1.5-V/3-V使用） |
| 文件頁數(shù)： | 6/16頁 |
| 文件大?。?/td> | 278K |
| 代理商： | TA2152FNG |
TA2152FNG
2006-04-19
6
(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
.
However, when the voltage level of V
CC2
is high, the DC output voltage is will be set to approximately 1.4 V.
(4) RF IN pin
The ripple rejection ratio can by improved by connecting a capacitor to this pin. Connection of a capacitor is
recommended, particularly for output-coupling type.
(5) Output application of power amplifier
For output-coupling type the center amplifier is not used with the result that current consumption is low.
Please set the C-AMP SW pin (pin 21) accordingly.
Output-coupling type: Pin 21 is connected to GND.
OCL type: Pin 21 is open.
RR
C (RF IN)
RF IN capacitance C (
μ
F)
R
80
70
60
50
30
40
0.1
0.2
0.5
1
2
5
10
Output-coupling type
VCC1
=
2.4 V
VCC2
=
1.2 V (ripple signal applied)
fr
=
100 Hz
Vr
=
20dBV
BIAS IN
=
4.7
μ
F
Open
Figure 3 Improvement of ripple rejection ratio
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