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参数资料
| 型号： | TA7628P |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 0.6 W, 1 CHANNEL, AUDIO AMPLIFIER, PDIP16 |
| 封装： | 0.300 INCH, 2.54 MM PITCH, PLASTIC, DIP-16 |
| 文件页数： | 6/12页 |
| 文件大小： | 478K |
| 代理商： | TA7628P |
TA7628P/HP
2002-03-05
3
RB = 220 k at VCC = 7.5 V
RB = 150 k at VCC = 9 V
4.
Precaution of preamplifier
(1)
It is better that the coupling capacitor between the volume and the output of preamplifier is small.
Recommended value: C = 0.47 F
(2)
In recording mode, the signal source resistance must be more than 1 k for ALC (Automatic Level
Control) operation. When this resistance is small, the ALC range becomes narrow.
5.
Buffer amplifier
When the output signal is clipped in the buffer amplifier, this signal returns to preamplifier and influences
to make THD bad.
To prevent this, in playback mode, the buffer amplifier is recommended to be cut-off by terminating the
output terminal to GND directly or by terminating the feedback terminal to GND through 330 or less
than this shown in Figure 2.
Figure 2
6.
Power amplifier
(1)
In case of the battery use (VCC ≤ 6 V), this IC is happen to oscillate (blocking oscillation) when the
impedance of power supply is high.
In this case, it is recommended to insert the resistance RA of 500 ~1 k between pin 10 and pin 12
(VCC~Filter II). By this method, this IC becomes very stable. But the output DC voltage is not center
by the influence of RA. Then the output wave shape is not symmetrical clipping wave and the
maximum output voltage is reduced. So we recommend to insert the other resistance RB between
pin 6 and pin 8 for compensating the output DC voltage.
(2)
When you use this IC at the supply voltage of more than 6 V, it is better to insert the resistance RB
for compensating output DC voltage. (Figure 3)
The recommended value:
Figure 3
(3)
The output coupling capacitance and bootstrap capacitance is better to be large because of getting the
maximum output power.
(4)
On the PC board, the interval between VCC and GND is better to be large.
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相关代理商/技术参数 |
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