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參數(shù)資料
| 型號： | TFA9843J |
| 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 20 W or BTL: 4 W to 40 W) |
| 中文描述： | 14 W, 2 CHANNEL, AUDIO AMPLIFIER, PZFM9 |
| 封裝： | POWER, PLASTIC, SOT-523-1, DIL-BENT-SIL, 9 PIN |
| 文件頁數(shù)： | 5/21頁 |
| 文件大?。?/td> | 142K |
| 代理商： | TFA9843J |
Philips Semiconductors
TFA9843J
2-channel audio amplifier (2 x SE or 1 x BTL)
Preliminary data
Rev. 02 — 19 January 2004
5 of 21
9397 750 12587
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
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 11
. The maximum output power is limited by the supply
voltage of 26 V and the maximum available output current is 4 A repetitive peak
current. A minimum load (SE) of 3
is required for supply voltages > 22 V; see
Figure 5
. A minimum load (BTL) of 6
is required for supply voltages > 22 V; see
Figure 6
.
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 13
(SE) or
Figure 14
(BTL) for 0 dB
respectively 12 dB headroom (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 TFA9843J 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 (THD = 0.2 %)
SE
P
o
= 5 W
P
o(ALL)
= 315 mW
Power dissipation (P
D
);
both channels driven
BTL
P
o
= 10 W
P
o(ALL)
= 630 mW
0 dB
12 dB
8.4 W
4.2 W
P
o ALL SE
)
-----------------
3
15.85
315
mW
=
=
P
o ALL BTL
)
--------------------
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 |
|---|---|
| TFA9843J/N1,112 | 功能描述:音頻放大器 AUDIO AMP 2CH 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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TFA9879 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Mono BTL class-D audio amplifier for portable applications with digital input |
| TFA9879HN/N1 | 制造商:NXP Semiconductors 功能描述:IC AMP AUDIO MONO 3W DBS17P |
| TFA9879HN/N1,118 | 功能描述:音頻放大器 ClassD 2.75W 2Channel 1.8V 5.7mA 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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TFA9879HN/N1,157 | 功能描述:音頻放大器 ClassD 2.75W 2Channel 1.8V 5.7mA 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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
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