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参数资料
| 型号： | TDA8942P/N1,112 |
| 厂商： | NXP SEMICONDUCTORS |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 1.5 W, 2 CHANNEL, AUDIO AMPLIFIER, PDIP16 |
| 封装： | 0.300 INCH, PLASTIC, SOT-38-1, MO-001, DIP-16 |
| 文件页数： | 18/22页 |
| 文件大小： | 394K |
| 代理商： | TDA8942P/N1,112 |
Philips Semiconductors
TDA8942P
2 x 1.5 W (3 W music power) stereo BTL audio amplier
Product data
Rev. 03 — 02 September 2003
5 of 22
9397 750 11707
Koninklijke Philips Electronics N.V. 2003. All rights reserved.
8.
Functional description
The TDA8942P is a stereo BTL audio power amplier capable of delivering 2
× 1.5 W
output power to a 16
load at THD = 10 %, using a 9 V power supply. The voltage
gain is xed at 32 dB.
With the three-level MODE input the device can be switched from standby to mute
and to operating mode.
The TDA8942P outputs are protected by an internal thermal shutdown protection
mechanism and a short-circuit protection.
8.1 Input conguration
The TDA8942P inputs can be driven symmetrical (oating) 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 VCC, so
coupling capacitors for both pins are necessary.
The input cut-off frequency is:
(1)
For Ri =45k and Ci = 220 nF:
(2)
As shown in Equation 1 and Equation 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
behavior.
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.
f
i cut
off
–
()
1
2
π R
i
C
i
×
()
-----------------------------
=
f
i cut
off
–
()
1
2
π 45 10
3
×
220
×
10
9
–
×
()
-----------------------------------------------------------------
16 Hz
==
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TDA8943 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:6 W mono Bridge Tied Load BTL audio amplifier |
| TDA8943SF | 制造商:PHILPS 功能描述: |
| TDA8943SF/N1,112 | 功能描述:音频放大器 6W MONO BTL PWR AMP RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装: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 制造商全称:NXP Semiconductors 功能描述:2 x 7 W stereo Bridge Tied Load BTL audio amplifier |
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