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| 型号： | TA8205AHQ |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 18 W, 2 CHANNEL, AUDIO AMPLIFIER, PZFM17 |
| 封装： | 2 MM PITCH, PLASTIC, HZIP-17 |
| 文件页数： | 8/14页 |
| 文件大小： | 934K |
| 代理商： | TA8205AHQ |
TA8205AHQ/ALQ
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
Amp 1 is GV1.
(dB)
R2
f
R
R2)
f
(R
R1
og
20
V1
G
+
=
l
..... (1)
The closed loop voltage gain of power Amp, Amp 3
and Amp 4 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. Stand
by SW function
By means of controlling pin(4) (stand
by terminal) to high
and low, the power suply can be set to on and off.
The threshold voltage of pin(4) is set at about 3V (typ.),
and the power supply current is about 1A (typ.) at the
stand
by state.
Pin(4) control voltage : V (SB)
Stand
by
Power
V (SB) (V)
On
Off
0~2
Off
On
3~VCC
Fig.3 With pin(4) set to high, power is turened on.
Advantage of stand
by SW
(1) Since VCC can directly be controlled to on / off by the microcomuter, the switching relay can be omitted.
(2) Since the control current is microscopic, the switching relay of small current capacity is satisfactory for
switching.
Fig.2
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TA8205AL | 制造商:TOSHIBA 制造商全称:Toshiba Semiconductor 功能描述:18W BTL x 2CH AUDIO POWER AMPLIFIER |
| TA8205ALQ | 制造商:TOSHIBA 制造商全称:Toshiba Semiconductor 功能描述:18W BTL 】 2CH Audio Power Amplifier |
| TA8207K | 制造商:Toshiba America Electronic Components 功能描述: |
| TA8207K_12 | 制造商:UTC-IC 制造商全称:UTC-IC 功能描述:LOW FREQUENCY POWER AMPLIFIER |
| TA8207KL-F12-H-T | 制造商:UTC-IC 制造商全称:UTC-IC 功能描述:LOW FREQUENCY POWER AMPLIFIER |
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