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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： | 6/56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
14 of 56
NXP Semiconductors
TDF8554J
4
45 W power amplifier with multiple voltage regulator
7.5.1 Start-up diagnostics with DC load detection
If the start-up diagnostics are enabled, the load condition of all four channels is
determined. At the end of the start-up diagnostics cycle, not only the load condition is
known (shorted load, normal load or open load), but also if a separate amplifier is
connected or if the outputs are shorted to battery or ground. If a separate amplifier
(booster) is detected, the amplifier can start-up in line driver mode (low gain setting).
The load diagnostic is insensitive to door-slam (slowly moving speaker due to slamming of
the car door) and to external interference such as crosstalk of relays switching in the
wiring harness; see Figure 8.
The load detection values are shown in Figure 9.
If only 4
speakers are connected, the low gain mode can be selected during the start-up
diagnostics. A shorted load is indicated until an impedance of 1.5
is reached. Even ‘soft’
shorts in the wiring harness will be detected.
Overvoltage protection (20 V)
yes
Over voltage pre-warning (16 V) can be enabled if IB4[D3] = 1
Start-up diagnostic notification
no
Maximum temperature
protection active
yes
Table 4.
Diagnostic information on pin DIAG
Diagnostic information
Pin DIAG
Fig 8.
Principle of start-up diagnostics
Fig 9.
Start-up diagnostics load detection levels
COMPARATORS
SPIKE
FILTER
DOOR-SLAM
PROCESSOR
OFFSET
GENERATOR
I2C-BUS BITS
LOAD CONDITION
001aam697
out +
out
SHORTED
NORMAL
LINE DRIVER
OPEN
0.5
Ω
1.5
Ω
high gain
low gain
1.5
Ω
3.2
Ω
20
Ω
20
Ω
80
Ω
80
Ω
200
Ω
200
Ω
400
Ω
400
Ω
001aaam698
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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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