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參數(shù)資料
| 型號(hào)： | TA8220HQ |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 30 W, 2 CHANNEL, AUDIO AMPLIFIER, PZFM17 |
| 封裝： | 2 MM PITCH, PLASTIC, HZIP-17 |
| 文件頁(yè)數(shù)： | 9/15頁(yè) |
| 文件大小： | 1206K |
| 代理商： | TA8220HQ |
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TA8220HQ
2006-04-28
3
The total closed loop gain GV of this IC can be obtained by expression below when the closed loop voltage gain of
amp1 is GV1.
(1)
(dB)
2
R
f
R
)
2
R
f
(R
1
R
og
20
V1
G
L
l
+
=
The closed loop voltage gain of power amp, amp3 and amp4 is fixed at GV3≒GV4 = 20dB.
Therefore, the total closed circuit voltage gain GV is obtained through BTL connection by the expression below.
GV = GV1 + GV3 + 6 (dB)………(2)
For example, when Rf = 0, GV is obtained by the
expressions (1) and (2) as shown below.
GV≒24 + 20 + 6 = 50dB
The voltage gain is reduced when Rf is increased.
(Fig.2)
With the voltage gain reduced, since (1) the
oscillation stability is reduced, and (2) the pop noise
changes when VCC is set to on, refer to the items 3
and 4.
2. Standby SW function
By means of controlling (4)pin (standby terminal) to
high and low, the power supply can be set to on and off.
The threshold voltage of (4)pin is set at 2.1V (3VBE), and
the power supply current is about 1A (typ.) at the
standby state.
Control voltage of (4)pin: V (SB)
Stand
By
Power
V (SB) (V)
On
Off
0~2
Off
On
3~VCC
<Adjustage of standby SW>
(1) Since VCC can directly be controlled to on / off by the microcomputer, the switching relay can be omitted.
(2) Since the control current is microscopic, the switching relay of small current capacity is satisfactory for
switching.
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相關(guān)代理商/技術(shù)參數(shù) |
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| TA8220HQ_06 | 制造商:TOSHIBA 制造商全稱:Toshiba Semiconductor 功能描述:30W BTL 】 2ch Audio Power Amplifier |
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| TA8221AH | 制造商:TOSHIBA 制造商全稱:Toshiba Semiconductor 功能描述:30W BTL x 2CH AUDIO POWER AMPLIFIER |
| TA8221AHQ | 制造商:Toshiba 功能描述:Audio Amp Speaker 2-CH Stereo 30W Class-AB 17-Pin HZIP |
| TA8221AL | 制造商:TOSHIBA 制造商全稱:Toshiba Semiconductor 功能描述:30W BTL x 2CH AUDIO POWER AMPLIFIER |
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