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| 型号： | TDF8553J |
| 厂商： | NXP SEMICONDUCTORS |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 87 W, 4 CHANNEL, AUDIO AMPLIFIER, PZFM37 |
| 封装： | PLASTIC, SOT725-1 |
| 文件页数： | 4/47页 |
| 文件大小： | 391K |
| 代理商： | TDF8553J |
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TDF8553J_1
NXP B.V. 2008. All rights reserved.
Objective data sheet
Rev. 01 — 3 December 2008
12 of 47
NXP Semiconductors
TDF8553J
4
× 50 Watt power amplier and multiple voltage regulator
8.6 Voltage regulators
The voltage regulator section contains:
Four switchable regulators and two standby regulators
Two power switches with loss-of-ground and surge protection
Second supply pin to reduce dissipation by means of an external DC-to-DC converter
Backup functionality for regulator 2
The TDF8553 uses low dropout voltage regulators for use in low voltage applications.
All of the voltage regulators except for the standby regulators can be controlled via the
I2C-bus. The voltage regulator section of this device has two power switches which are
capable of delivering unregulated continuous current, and has several fail-safe protection
modes. It conforms to peak transient tests and protects against continuous high voltage
(24 V), short-circuits and thermal stress. Standby regulators 2 and 6 will try to maintain
output for as long as possible even if a thermal shut-down or any other fault condition
occurs. During overvoltage stress conditions, all outputs except regulators 2 and 6 will
switch off and the device will be able to supply a minimum current for an indenite amount
of time sufcient for powering the memory of a microcontroller and bus controller
functionality. Provision is made for an external reserve supply capacitor to be connected
to pin BUCAP which can store enough energy to allow regulator 2 to supply a
microcontroller for a period long enough for it to prepare for a loss-of-voltage.
8.6.1 Standby regulator outputs
Standby outputs (regulators 2 and 6) are used for the microcontroller and bus controller
supply. These regulators will not shut down with the switched regulators and cannot be
controlled by the I2C-bus. The standby regulators will not shut down during load dump
transients or by high temperature protection.
8.6.2 Backup capacitor
The backup capacitor (Cbackup) is used as a backup supply for the regulator 2 output when
the battery supply voltage (VP) cannot support the regulator 2 voltage.
Fig 4.
Amplier output during supply voltage drop
V
(V)
t (s)
SVR voltage
vehicle engine start
headroom voltage
amplifier
DC output voltage
VP
001aai692
14
8.4
7
相关PDF资料 |
PDF描述 |
|---|---|
| TDF8554J/N2 | 44 W, 4 CHANNEL, AUDIO AMPLIFIER, PZFM37 |
| TDF8554J/N4 | 44 W, 4 CHANNEL, AUDIO AMPLIFIER, PZFM37 |
| TDF8555J/N1 | 44 W, 4 CHANNEL, AUDIO AMPLIFIER, PZFM37 |
| TDF8599TD | 70 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO36 |
| TDF8599TH | 70 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO36 |
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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