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参数资料
| 型号： | TA8157AFN |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 0.014 W, 3 CHANNEL, AUDIO AMPLIFIER, PDSO24 |
| 封装： | SSOP-24 |
| 文件页数： | 11/15页 |
| 文件大小： | 1080K |
| 代理商： | TA8157AFN |
TA8157AF/AFN
2002-10-30
5
Application Note
(1)
PW SW
It is necessary to connect an external pull-down resistor with terminal PW SW (pin(11)), in case that this
IC is turned on due to external noise etc.
(2)
MT SW
The leak current flows through the terminal of MT SW (pin(10)), in case that this terminal is connected
with VCC line independently, even though this IC is off-mode (the terminal of PW SW (pin(11)) is off-mode).
It is necessary to connect an external pull-down resistor with terminal MT SW, in case that this IC is
turned on due to external noise etc.
(3)
BST SW
The leak current never flows through the terminal of BST SW (pin(1)) even though this terminal is at any
condition, because the ripple filter circuit supplies the BST SW circuit with power source. The terminal of
BST SW should not be applied higher voltage than VCC, to prevent IC from destruction. It is necessary to
connect an external pull-up resistor with terminal BST SW, in case that this IC doesn't operate normally
due to external noise etc.
In case that boost amplifier is on, BST SW terminal should be appliied VCC ~(VCC-0.3V).
(4)
Input of amplifier
Each input signal should be applied through a condenser. In case that DC current or DC voltage is applied
to each amplifier, the internal circuit has unbalance and the each amplifier doesn't operate normally.
It is advised that input signal refer to voltage of VREF, in order to reduce a pop sound.
(5)
Ripple filter
It is necessary to connect a transistor for ripple filter, because this IC doesn't have transistor for ripple
filter. Care should be taken to stabilize the ripple filter circuit, because the ripple filter circuit supplies
VREF circuit, adder amplifier and boost amplifier with power source.
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