參數(shù)資料
型號(hào)： TA2131FLG
廠商： Toshiba Corporation
英文描述： Low Current Consumption Headphone Amplifier for Portable MD Player (With Bass Boost
中文描述： 低電流消耗為便攜式耳機(jī)放大器MD播放機(jī)（帶低音提升
文件頁(yè)數(shù)： 10/21頁(yè)
文件大小： 439K
代理商： TA2131FLG
TA2131FLG
2006-04-19
10
3.
Beep
Beep sound signals from microcomputer can be received by the beep input terminal (15-pin).
The PW
A
and PW
B
of the power amplifier during power mute are turned OFF, and the beep signal input
from BEEP-IN (15-pin) is output from the BEEP-OUT terminal (23/24-pin) as fixed current, after passing
through the converter and current amplification stage. Connecting this terminal to the headphone load
outputs the beep sound.
If the beep sound is not input, fix the BEEP-IN (15-pin) terminal to GND level.
4.
Power Switch
As long as the power switch is not connected to “H” level, the IC does not operate. If it malfunctions due
to external noise, however, it is recommended to connect a pull-down resistor externally (the power switch
is set to be highly sensitive).
60
10
0
20
40
30
100
300
1 k
3 k
10 k
30 k
100 k
VCC1
=
2.8 V
VCC2
=
1.2 V
Rg
=
620
RL
=
16
Vo
=
22dBV
WIDE BAND
Output C
=
220
μ
F
C
=
0.47
μ
F
C
=
2.2
μ
F
C
=
1
μ
F
Vrefshort
f (Hz)
C
Figure 6 Low-Pass Compensation Condenser and Crosstalk
CT – f
V
CC
PW SW
(18-pin)
MT SW
(17-pin)
BEEP IN
(15-pin)
OFF
OFF
OFF
ON
ON
OFF
100 ms
100 ms
200 ms
20
15
24
23
I
BEEP
I
BEEP
I
D
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