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參數(shù)資料
| 型號： | TDA8943 |
| 廠商： | NXP Semiconductors N.V. |
| 元件分類： | 運動控制電子 |
| 英文描述： | 6 W mono Bridge Tied Load BTL audio amplifier |
| 中文描述： | 6聲道橋接負載橋接音頻放大器 |
| 文件頁數(shù)： | 4/20頁 |
| 文件大?。?/td> | 358K |
| 代理商： | TDA8943 |
Philips Semiconductors
TDA8943SF
6 W mono Bridge Tied Load (BTL) audio amplifier
Product specification
Rev. 02 — 7 April 2000
4 of 20
9397 750 06865
Philips Electronics N.V. 2000. All rights reserved.
8.1 Input configuration
The TDA8943SF inputs can be driven symmetrical (floating) as well as asymmetrical.
In the asymmetrical mode one input pin is connected via a capacitor to the signal
ground which should be as close as possible to the SVR (electrolytic) capacitor
ground. Note that the DC level of the input pins is half of the supply voltage V
CC
, so
coupling capacitors for both pins are necessary.
The input cut-off frequency is:
(1)
For R
i
= 45 k
and C
i
= 220 nF:
(2)
As shown in
Equation 1
and
2
, large capacitor values for the inputs are not
necessary
;
so the switch-on delay during charging of the input capacitors, can be
minimized. This results in a good low frequency response and good switch-on
behaviour.
Remark:
To prevent HF oscillations do not leave the inputs open, connect a capacitor
of at least 1.5 nF across the input pins close to the device.
8.2 Power amplifier
The power amplifier is a Bridge Tied Load (BTL) amplifier with an all-NPN output
stage, capable of delivering a peak output current of 2 A.
The BTL principle offers the following advantages:
Lower peak value of the supply current
The 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 8
. The maximum output power is limited by the maximum
supply voltage of 12 V and the maximum available output current: 2 A repetitive peak
current.
f
i cut
off
–
)
2
π
R
i
(
C
i
×
)
----------------------------
=
f
i cut
off
–
)
×
2
π
45
(
10
3
×
220
10
9
–
×
)
----------------------------------------------------------------
16
Hz
=
=
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TDA8943SF | 制造商:PHILPS 功能描述: |
| TDA8943SF/N1,112 | 功能描述:音頻放大器 6W MONO BTL PWR AMP 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 |
| TDA8943SF/N1.112 | 制造商:NXP Semiconductors 功能描述:AMP AUDIO POWER SINGLE 8943 SIL-9 |
| TDA8944 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:2 x 7 W stereo Bridge Tied Load BTL audio amplifier |
| TDA8944AJ | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:2 x 7 W BTL audio amplifier with DC gain control |
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