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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： | 13/56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
20 of 56
NXP Semiconductors
TDF8554J
4
45 W power amplifier with multiple voltage regulator
[1]
X = neither mode selected.
7.7 I2C-bus
If pin STB is LOW, the total quiescent current is low, and the I2C-bus lines are not loaded.
When pin STB is switched HIGH, the TDF8554J enters operating mode and performs a
POR which results in pin DIAG going LOW. The TDF8554J starts when IB1[D0] = 1. Bit
D0 also resets the ‘power-on reset occurred’ bit (DB2[D7]) and releases pin DIAG.
Soft mute and hard mute can be activated via the I2C-bus. Soft mute can be activated
independently for the front channels (1 and 3) and rear channels (2 and 4), and mutes the
audio in 15 ms. Hard mute activates the mute for all channels at the same time and mutes
the audio in 400
s. Unmuting after a hard mute will be a soft unmute of approximately
15 ms. When pin STB is switched to standby mode, and the amplifier has started, first the
hard mute is activated and then the amplifier shuts down. It is possible to fully mute the
amplifiers within 400
s by making pin STB LOW, for example during an engine start.
7.8 I2C-bus diagnostic bits read out/cleared after read
The amplifier’s diagnostic information can be read via the I2C-bus. The I2C-bus bits are
set on a failure and will be reset with the I2C-bus read command (clear after read). Even
when the failure is removed the microprocessor will know what was wrong by reading the
I2C-bus. Old information is read during an I2C-bus read. Most up-to-date information is
read after two consecutive read commands.
Cleared after read means that the I2C-bus bits are cleared after a read command. The
Clear command is done only if all four data bytes are read. If only three data bytes are
read, the I2C-bus latches are not cleared and the old value remains in the latches.
When selected, pin DIAG will give up-to-date diagnostic information. When a failure is
removed, pin DIAG will be released instantly, independently of the I2C-bus latches.
8.
Functional description voltage regulator section
The voltage regulator section contains:
Four switchable regulators and one permanent active regulator
Two power switches with loss-of-ground protection
Reset push-pull output
Backup functionality
Table 7.
DC output voltage as a function of different gain settings
Channels 1 and 3
gain setting (dB)
Channels 2 and 4
gain setting (dB)
Line driver/low gain
mode IB4[D4][1]
All channels DC
output voltage (V)
26
X
0.5VP
16
26
X
0.5VP
26
16
X
0.5VP
16
low gain mode
0.5VP
16
line driver mode
0.23VP
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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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