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參數(shù)資料
| 型號(hào)： | TA7251BP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 30 W, 1 CHANNEL, AUDIO AMPLIFIER, PZFM12 |
| 封裝： | HZIP-12 |
| 文件頁(yè)數(shù)： | 6/12頁(yè) |
| 文件大?。?/td> | 1045K |
| 代理商： | TA7251BP |
TA7250,51BP
2002-10-30
3
Application Information
(this explanatory terminal number is for
TA7250BP)
1. Voltage gain
The closed loop voltage gain: GV is determined by Rf1, Rf2
and R0.
If RoRf1 > Rf2
GV≒20og
f2
R
f1
R
+6 (dB)
(R0 is established 20k)
Care must be taken, sine the current “I” flows to Rf1 and Rf2
from quiescent output voltage at pin(12) / (7) and it is
impossible decrease so much Rf1 and Rf2.
When GV = 40dB, it is recommended to use Rf1 for 1k and
Rf2 for 20.
2. Oscillation prevention
For the oscillation prevention, the capacitors should be inserted output terminal to GND and output to another
output.
These are recommended to use the polyester film capacitor which temperature characteristics are better.
It use ceramic capacitor, the characteristics is liable to be influenced by temperature, than it is better to use the
capacitor of which capacity is lager than the recommended value, surely carry out the temperature test, and
confirm the oscillation allowance.
Especially when using this IC with the voltage gain reduced or with the feedback amount increased, the phase
inversion is produced in high frequency and the oscillation is liable to be generated.
Therefore, use this IC at GV = 40dB or over after sufficiently checking the capacity of capacitor, type of capacitor
and mounting position of capacitor.
3. Aso circuit
This IC incorporates the protection circuit of out to VCC, out to GND and shorting between output and another
output.
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