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參數(shù)資料
| 型號(hào)： | TFA9842J |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 2-channel audio amplifier; SE: 1 W to 7.5 W; BTL: 2 W to 15 W |
| 中文描述： | 7.5 W, 2 CHANNEL, AUDIO AMPLIFIER, PZFM9 |
| 封裝： | PLASTIC, SOT-523-1, DIL-BENT-SIL, 9 PIN |
| 文件頁(yè)數(shù)： | 5/21頁(yè) |
| 文件大?。?/td> | 143K |
| 代理商： | TFA9842J |
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Philips Semiconductors
TFA9842J
2-channel audio amplifier (2 x SE or 1 x BTL)
Preliminary data
Rev. 01 — 26 April 2004
5 of 21
9397 750 12013
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Ripple frequency on the supply voltage is twice the signal frequency
No expensive DC-blocking capacitor
Good low frequency performance.
8.2.1
Output power measurement
The output power as a function of the supply voltage is measured on the output pins
at THD = 10 %; see
Figure 6
.
The maximum output power is limited by the supply voltage of 26 V and the maximum
available output current is 3 A (repetitive peak current). A minimum load for SE of 4
and for BTL of 16
is required for V
CC
> 22 V; see
Figure 5
.
8.2.2
Headroom
Typical CD music requires at least 12 dB (factor 15.85) dynamic headroom,
compared to the average power output, for transferring the loudest parts without
distortion. At V
CC
= 18 V and P
o
= 5 W (SE with R
L
= 4
) or P
o
= 10 W (BTL with
R
L
= 8
) at THD = 0.2 % (see
Figure 7
), the Average Listening Level (ALL) music
power without any distortion yields:
(4)
(5)
The power dissipation can be derived from
Figure 9
(SE and BTL) for a headroom of
0 dB and 12 dB, respectively (see
Table 4
).
For the average listening level a power dissipation of 4.2 W can be used for a
heatsink calculation.
8.3 Mode selection
The TFA9842J has three functional modes, which can be selected by applying the
proper DC voltage to pin MODE (see
Table 5
and
Figure 3
).
Table 4:
Headroom
Power rating as function of headroom
Power output
SE
P
o
= 5 W
P
o(ALL)
= 315 mW
Power dissipation
(both channels driven)
BTL
P
o
= 10 W
P
o(ALL)
= 630 mW
0 dB
12 dB
P
D
= 8.4 W
P
D
= 4.2 W
P
o ALL SE
)
3
15.85
---------------
315
mW
=
=
P
o ALL BTL
)
10 10
3
15.85
------------------
630
mW
=
=
Table 5:
V
MODE
0 to 0.8 V
4.5 V to (V
CC
3.5 V)
(V
CC
2.0 V) to V
CC
Mode selection
Amplifiers 1 and 2
standby
mute
on
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TFA9842J/N1,112 | 功能描述:音頻放大器 STEREO 2X6W SE MPA RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TFA9843AJ | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:20 W stereo power amplifier with volume control |
| TFA9843AJ/N1,112 | 功能描述:音頻放大器 STEREO 2X8W SE MPA RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TFA9843BJ | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:2-channel audio amplifier (SE: 1 W to 20 W) |
| TFA9843BJ/N1,112 | 功能描述:音頻放大器 STEREO 2X8W SE MPA RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
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