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| 型号： | TAS5026PAGR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP64 |
| 封装： | GREEN, PLASTIC, TQFP-64 |
| 文件页数： | 17/52页 |
| 文件大小： | 886K |
| 代理商： | TAS5026PAGR |
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Architecture Overview
19
SLES041B—November 2002
TAS5026
0
–10
Response
–
dB
3.18 (50
s)
10.6 (15
s)
f – Frequency – kHz
De-Emphasis
Figure 2–11. De-Emphasis Filter Characteristics
2.4
Pulse Width Modulator (PWM)
The TAS5026 contains six channels of high performance digital Equibit PWM modulators that are designed
to drive switching output stages (back ends) in both single-ended (SE) and H-bridge (bridge tied load)
configuration. The TAS5026 device uses noise shaping and sophisticated error correction algorithms to
achieve high power efficiency and high-performance digital audio reproduction.
The PWM provides six pseudo-differential outputs to drive six monolithic power stages (such as TAS5110)
or six discrete differential power stages using of gate drivers (such as the TAS5182) and MOSFETs in
single-ended or bridged configurations. The TAS5026 also provides a high performance differential output that
can be used to drive an external analog headphone amplifier.
2.4.1 Clipping Indicator
The clipping output is designed to indicate clipping. When any of the six PWM outputs exceeds the maximum
allowable amplitude, the clipping indicator is asserted. The clipping indicator is cleared every 10 ms.
2.4.2 Error Recovery
Error recovery is used to provide error management and to permit the PWM output to be reset while preserving
all inter-volume, inter-channel delay, dc offsets, and the other internal settings. Error recovery is initiated by
bringing the ERR_RCVRY terminal low for a minimum 5 MCLK_IN cycles or by setting the error recovery bit
in control register 1. Error recovery is a level sensitive signal.
The device also performs an error recovery automatically:
When the speed configuration is changed to normal, double, or quad speed
Following a change in the serial data bus interface configuration
When ERR_RCVRY is brought low, all valid signals go low, and the PWM-P and PWM-M outputs go low. If
there are any pending speed configurations, these changes are then performed. When ERR_RCVRY is
brought high, a delay of 4 ms to 5 ms is performed before the system starts the output re-initialization
sequence. After the initialization time, the TAS5026 begins normal operation. During error recovery, all
controls and device settings that were not updated are maintained in their current configurations.
To permit error recovery to be used to provide TAS5100 error management and recovery, the delay between
the start of (falling edge) error recovery and the falling edge of valid 1 though valid 6 is selectable. This delay
can be selected to be either 6
s or 47 s.
During error recovery all serial data bus operations are ignored. At the conclusion of the sequence, the error
recovery register bit is returned to normal operation state. Table 2–11 shows the device output signal states
while during error recovery.
Table 2–11. Device Outputs During Error Recovery
SIGNAL
MODE
SIGNAL STATE
Valid 1–Valid 6
All
Low
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TAS5026PAGRG4 | 功能描述:多媒体杂项 Dig Aud PWM Proc RoHS:否 制造商:Texas Instruments 类型: 通道数量: 转换速率:540 Mbps 分辨率: 封装 / 箱体:SOIC-16 封装:Tube |
| TAS5028 | 制造商:TI 制造商全称:Texas Instruments 功能描述:8 Channel Digital Audio PWM Processor |
| TAS5028-5122C6EVM | 功能描述:音频 IC 开发工具 TAS5028-5122C6 Eval Mod RoHS:否 制造商:Texas Instruments 产品:Evaluation Kits 类型:Audio Amplifiers 工具用于评估:TAS5614L 工作电源电压:12 V to 38 V |
| TAS5028A | 制造商:TI 制造商全称:Texas Instruments 功能描述:8 Channel Digital Audio PWM Processor |
| TAS5028APAG | 功能描述:音频放大器 8Ch Dig Aud PWM Proc 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 |
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