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| 型號： | TDF8555J/N1 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 44 W, 4 CHANNEL, AUDIO AMPLIFIER, PZFM37 |
| 封裝： | PLASTIC, SOT725-1, 37 PIN |
| 文件頁數(shù)： | 14/55頁 |
| 文件大小： | 534K |
| 代理商： | TDF8555J/N1 |
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TDF8555J
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 1 — 29 August 2011
21 of 55
NXP Semiconductors
TDF8555J
4
45 W power amplifier with multiple voltage regulator
The quiescent current has a very low level of 180
A (typical value) with only regulators 2
and 6 active. Due to the low voltage operation of the application, low dropout voltage
regulators are used.
All the regulators, except for the standby regulators, can be controlled by the I2C-bus. The
device has in addition to the regulators, two I2C-controlled power switches which are
capable of delivering 400 mA continuous current. This device has several fail-safe
protection modes. This module conforms to peak transient tests and protects against high
continuous voltage (24 V), short-circuits and thermal stress. The standby regulators will
maintain output as long as possible even in thermal shutdown or any other fault condition.
During overvoltage stress, all outputs except the standby regulators will shut off and the
device is able to supply a minimum current for indefinite amount of time allowing
sustained memory for a microprocessor. Also, there is a provision for use of a reserve
supply capacitor that will hold enough energy for regulator 2 to allow a microprocessor to
prepare for loss of voltage.
8.1 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.
8.2 Standby regulator outputs
Regulators 2 and 6 are used for the microcontroller and bus controller supply. They have
a low quiescent current and cannot be switched. These regulators will not shut down with
the switched regulators and cannot be controlled by the I2C-bus. These regulators will not
shut down during load dump transients or high temperature protection.
8.3 Bus controller regulator output
Regulator 6 has virtually the same functionality as regulator 2 but has different output
voltage and current.
8.4 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.
8.5 Backup function
A backup function is implemented by a switch which behaves like an ideal diode between
pins VP and BUCAP. The forward voltage of this ideal diode depends on the current
flowing through it. This function allows regulator 2 to be supplied during brief periods when
no supply voltage is present on pin VP. It requires an external capacitor connected to
pin BUCAP and ground. When the supply voltage is present on pin VP this capacitor will
be charged to a level of VP 0.3 V. This charge can now be used to supply regulator 2
when VP is absent for a short period of time.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TDF8590TH | 制造商:PHILIPS 制造商全稱: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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