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參數(shù)資料
| 型號： | TDA8946 |
| 廠商： | NXP Semiconductors N.V. |
| 元件分類： | 運動控制電子 |
| 英文描述： | 2 x 15 W stereo Bridge Tied Load BTL audio amplifier |
| 中文描述： | 2 x 15瓦的立體聲橋接負載橋接音頻放大器 |
| 文件頁數(shù)： | 4/23頁 |
| 文件大?。?/td> | 393K |
| 代理商： | TDA8946 |
Philips Semiconductors
TDA8946J
2 x 15 W stereo BTL audio amplifier
Product specification
Rev. 02 — 14 March 2000
4 of 23
9397 750 06863
Philips Electronics N.V. 2000. All rights reserved.
8.
Functional description
The TDA8946J is a stereo BTL audio power amplifier capable of delivering 2
×
15 W
output power to an 8
load at THD = 10%, using a 18 V power supply and an
external heatsink. The voltage gain is fixed at 32 dB.
With the three-level MODE input the device can be switched from ‘standby’ to ‘mute’
and to ‘operating’ mode.
The TDA8946J outputs are protected by an internal thermal shutdown protection
mechanism and a short-circuit protection.
8.1 Input configuration
The TDA8946J 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.
n.c.
OUT2
GND2
V
CC2
OUT2+
13
14
15
16
17
not connected
negative loudspeaker terminal 2
ground channel 2
supply voltage channel 2
positive loudspeaker terminal 2
Table 3:
Symbol
Pin description
…continued
Pin
Description
f
i cut
off
–
)
2
R
i
C
i
)
----------------------------
=
f
i cut
off
–
)
×
2
π
45
(
10
3
×
220
10
9
–
×
)
----------------------------------------------------------------
16
Hz
=
=
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA8946AJ | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:2 x 15 W BTL audio amplifier with DC gain control |
| TDA8946AJ/N2,112 | 功能描述:音頻放大器 2X15W AUDIO AMP VOL CTRL 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 |
| TDA8946J | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:2 x 15 W stereo Bridge Tied Load BTL audio amplifier |
| TDA8946J/N1,112 | 功能描述:音頻放大器 AUDIO AMP 2X15W 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 |
| TDA8947J | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:4-channel audio amplifier (SE: 1 W to 25 W; BTL: 4 W to 50 W) |
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