參數(shù)資料
型號(hào)： TDF8554J/N4
廠商： NXP SEMICONDUCTORS
元件分類(lèi)： 音頻／視頻放大
英文描述： 44 W, 4 CHANNEL, AUDIO AMPLIFIER, PZFM37
封裝： PLASTIC, SOT725-1, 37 PIN
文件頁(yè)數(shù)： 16/56頁(yè)
文件大?。?/td> 597K
代理商： TDF8554J/N4
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
23 of 56
NXP Semiconductors
TDF8554J
4
45 W power amplifier with multiple voltage regulator
8.7 Protection
All regulator and switch outputs are fully protected against load dump and short-circuit
(foldback current protection); see Figure 15. At load dump, all regulator outputs, except
the output of regulator 2, will go LOW. The power switches can withstand ‘loss of ground’
which means that pin GND is disconnected and the switch output is connected to ground.
8.8 Temperature protection
The amplifier is switched off when the regulator junction temperature becomes too high to
prevent undefined audio signals when the regulators are switched off while the amplifier is
still on. A regulator junction temperature that is too high is indicated by pin DIAG and can
be read out via the I2C-bus DB2[D6].
If the junction temperature still increases and the regulator reaches the maximum
temperature protection level, all regulators and switches will be disabled except the
outputs of regulator 2.
8.9 Switched regulator outputs
Switched outputs (regulator 1, 3, 4 and 5) can be programmed by the I2C-bus and have
an internal protection for overtemperature conditions. The regulated outputs, supplying
pulsed current loads, will contaminate the line with high frequency noise, so it is important
to prevent any cross-coupling between the regulated outputs, particularly with the 8.3 V
supply for audio.
9.
I2C-bus specification
Fig 15. Foldback current protection
VO(reg)
IOS
IOlim
IO(reg)
001aan206
Table 8.
TDF8554J hardware address
A6
A5
A4
A3
A2
A1
A0
R/W
Hex
1
0
1
0
0 = write to TDF8554J;
1 = read from TDF8554J
D8
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TDF8590TH 制造商:PHILIPS 制造商全稱(chēng):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:音頻放大器 AMPLIFIER CLASS D RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)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
TDF8590TH/N1S,118 功能描述:音頻放大器 4/8 OHM CLASS D AMP RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)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
TDF8590TH/N1-T 功能描述:音頻放大器 AMPLIFIER CLASS D RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)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
TDF8590TH/N1TJ 制造商:NXP Semiconductors 功能描述:- Tape and Reel
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