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| 型号： | TDF8554J/N4 |
| 厂商： | NXP SEMICONDUCTORS |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 44 W, 4 CHANNEL, AUDIO AMPLIFIER, PZFM37 |
| 封装： | PLASTIC, SOT725-1, 37 PIN |
| 文件页数： | 44/56页 |
| 文件大小： | 597K |
| 代理商： | TDF8554J/N4 |
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TDF8554J
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 1 — 31 August 2011
49 of 56
NXP Semiconductors
TDF8554J
4
45 W power amplifier with multiple voltage regulator
14.2 Beep input circuit
Beep input circuit to amplify the beep signal from the microcontroller to all 4 amplifiers with
gain set to 0 dB. Note that this circuit will not affect amplifier performance.
14.3 Regulator output noise
The outputs of regulators 1 to 5 are designed to give very low noise with good stability.
output capacitor on the noise figure.
[1]
Measured in the frequency range 20 Hz to 80 kHz; at IO(reg) =10mA.
14.4 Regulator stability
The regulators are made stable by the external capacitors connected to the regulator
outputs. The stability can be guaranteed with almost any output capacitor if its Equivalent
Series Resistance (ESR) stays below the ESR curve shown in Figure 34. If an electrolytic
capacitor is used, its behavior with temperature can cause oscillations at extremely low
temperature. Oscillation problems can be avoided by adding a 47 nF capacitor in parallel
with the electrolytic capacitor. The following example describes how to select the value of
output capacitor.
Fig 33. Application diagram for beep input
TDF8554J
2.2 μF
ACGND
1.7 kΩ
from microcontroller
100 Ω
0.22 μF
47 pF
aaa-000379
Table 27.
Regulator noise figures
Regulator
Noise figure (
V) [1]
Co = 10 F
Co = 47 F
Co = 100 F
1
225
195
185
2
750
550
530
3120
100
95
4
225
195
185
5
320
285
270
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相关代理商/技术参数 |
参数描述 |
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| TDF8590TH | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:2 X 80 W SE (4 OHM) or 1 X 160 W BTL (8 OHM) class-D amplifier |
| TDF8590TH/N1,118 | 功能描述:音频放大器 AMPLIFIER CLASS D 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 |
| TDF8590TH/N1S,118 | 功能描述:音频放大器 4/8 OHM CLASS D 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 |
| TDF8590TH/N1-T | 功能描述:音频放大器 AMPLIFIER CLASS D 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 |
| TDF8590TH/N1TJ | 制造商:NXP Semiconductors 功能描述:- Tape and Reel |
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