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參數(shù)資料
| 型號： | TA8225LQ |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 45 W, 1 CHANNEL, AUDIO AMPLIFIER, PSFM17 |
| 封裝： | 2 MM PITCH, PLASTIC, HSIP-17 |
| 文件頁數(shù)： | 13/17頁 |
| 文件大?。?/td> | 1284K |
| 代理商： | TA8225LQ |
TA8225HQ/LQ
2006-04-28
5
(2) Input offset voltage
Input offset voltage is increased by as many times as a gain and appears as output offset voltage.
Input offset voltage is affected by an external resistor in addition to properness of pair of capacitor in IC.
An example of a general application circuit is shown in (Fig.5). In this case, input to the differential amplifier
composing the buffer amplifier is decided to be 30k + 1.1k = 31.1k at the in (+) side and 1.1k at the in ()
side. Therefore a rising difference of about 30 times between the in (+) side and the in () side.
So, to fit input offset voltages, it is possible to suppress the input offset voltage by adjusting it to 31.1k both
at the in (+) and in () sides according to the application example shown in (Fig.6). As input coupling
capacitors are used in actual set, the circuit shown in (Fig.7) is considered. In this case, it is necessary to
take the utmost care of proper pair of CIN (+) and CIN ().
Pop noise level affected by input offset voltage shall be checked on an actually mounted set.
4. Junction temperature detecting pin(2)
Using temperature characteristic of a band gap circuit and in proportion to junction temperature, pin(2) DC
voltage: V2 rises at about ±10mV / °C temperature characteristic. So, the relation between V2 at Tj = 25°C and
V2χ at Tj =χ°C is decided by the following expression:
C)
25(
C
10mV /
C)
(25
2
V
2
V
C)
(
j
T
°
+
°
χ
=
°
χ
In deciding a heat sink suze, a junction temperature can be
easily made clear by measuring voltage at this pin while a
backside temperature of IC was so far measured using a
thermocouple type thermometer.
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| TA8225HQ | 45 W, 1 CHANNEL, AUDIO AMPLIFIER, PZFM17 |
| TA8225L | 45 W, 1 CHANNEL, AUDIO AMPLIFIER, PSFM17 |
| TA8225H | 45 W, 1 CHANNEL, AUDIO AMPLIFIER, PZFM17 |
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| TA8227APG-D12-H-T | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:LOW FREQUENCY POWER AMPLIFIER |
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