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参数资料
| 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： | 56/56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
9 of 56
NXP Semiconductors
TDF8554J
4
45 W power amplifier with multiple voltage regulator
If the amplifier starts, and a speaker fault occurs (double-fault condition: one side of the
speaker connected to ground and one side of the speaker connected to one output), the
amplifier only sets the speaker fault detection bits.
If the amplifier is switched off by the I2C-bus (IB1[D0] = 0), the soft mute is activated and
the capacitor on pin SVR is discharged. If the amplifier is switched off by pulling pin STB
LOW, the amplifier is muted (fast mute) and then the capacitor on pin SVR is discharged.
This fast mute can be used for instance, when an external engine start detection is used.
7.2 Engine start and low voltage operation
The voltage on pin SVR is used as a reference voltage for the input bias (set to
0.23
battery voltage + 2 diode voltage V
be) and as a reference for generating half the
filtered supply voltage at the amplifier output. The capacitor on pin SVR is required for
improved supply voltage ripple rejection and channel separation between the four
channels.
The DC output voltage relates to the SVR voltage to prevent common mode ripple on the
speaker lines. If the supply voltage drops during an engine start, the output will follow
slowly due to the SVR capacitor. To create sufficient headroom for the output signal below
a battery voltage of 10 V, the DC-output voltage will directly follow half the supply voltage.
Fig 3.
Start-up and shut-down in I2C mode
twake
td(fast-mute)
td(mute-off)
toff
tamp-on
VP
DIAG
STB
SVR
amplifier
output
DB2[D7]
POR
IB1[D0]
start enable
001aam685
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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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