- 您现在的位置：买卖IC网 > PDF目录98163 > TAS5424ATPHDQ1 (TEXAS INSTRUMENTS INC) 116 W, 4 CHANNEL, AUDIO AMPLIFIER, PQFP64 PDF资料下载
参数资料
| 型号： | TAS5424ATPHDQ1 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 116 W, 4 CHANNEL, AUDIO AMPLIFIER, PQFP64 |
| 封装： | PLASTIC, HTQFP-64 |
| 文件页数： | 11/51页 |
| 文件大小： | 1422K |
| 代理商： | TAS5424ATPHDQ1 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页当前第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页
www.ti.com
SLOS535B – MAY 2009 – REVISED JANUARY 2010
The user may restart the affected channel via I2C. An OCSD event activates the fault pin, and the affected
channel(s) are recorded in the I2C fault register. If the supply or ground short is strong enough to exceed the
peak current threshold but not severe enough to trigger the OCSD, the peak current limiter prevents excess
current from damaging the output FETs, and operation returns to normal after the short is removed.
3. DC Detect—This circuit detects a dc offset continously during normal operation at the output of the amplifier.
If the dc offset reaches the level defined in the I2C registers for the specified time period, the circuit triggers.
By default a dc detection event does not shut the output down. The shutdown function can be enabled or
disabled via I2C. If enabled, the triggered channel shuts down, but the others remain playing and the FAULT
pin is asserted. The positive dc level and negative dc level are defined in I2C registers and can have
separate thresholds.
4. Clip Detect—The clip detect circuit alerts the user to the presence of a 100% duty-cycle PWM due to a
clipped waveform. When this occurs, a signal is passed to the CLIP_OTW pin and it is asserted until the
100% duty-cycle PWM signal is no longer present. All four channels are connected to the same CLIP_OTW
pin. Through I2C, the CLIP_OTW signal can be changed to clip-only, OTW-only, or both. A fourth mode,
used only during diagnostics, is the option to report tweeter detection events on this pin (see the Tweeter
Detection section). The microcontroller in the system can monitor the signal at the CLIP_OTW pin and may
be configured to reduce the volume to all four channels in an active clipping-prevention circuit.
5. Overtemperature Warning (OTW) and Overtemperature Shutdown (OTSD)—By default, the CLIP_OTW
pin is set to indicate an OTW. This can be changed via I2C commands. If selected to indicate a temperature
warning, the CLIP_OTW pin is asserted when the die temperature reaches 125°C. The OTW has three
temperature thresholds with a 10°C hysteresis. Each threshold is indicated in I2C register 0x04 bits 5, 6, and
7. The TAS5414A and TAS5424A still function until the temperature reaches the OTSD threshold, 155°C, at
which time the outputs are placed into Hi-Z mode and the FAULT pin is asserted. I2C is still active in the
event of an OTSD and the registers can be read for faults, but all audio ceases abruptly. The OTSD resets at
145°C, to allow the TAS5414A/5424A to be turned back on through I2C. The OTW is still indicated until the
temperature drops below 115°C. All temperatures are nominal values.
CAUTION
CAUTIONARY NOTE: The PHD package version of the TAS5414A has a thermal
weakness when any channel is outputting high current. The TAS5414A PHD may
experience permanent thermal-related damage when high output current causes
heating in the output stages of the device. Typical dangerous scenarios include
shorted output loads and when delivering high power to low-impedance loads. The
DKD versions of the TAS5414A and TAS5424A do not have this thermal weakness
and are not at risk for damage due to these conditions. Please contact Texas
Instruments directly for further application details.
6. Undervoltage (UV) and Power-on-Reset (POR)—The undervoltage (UV) protection detects low voltages on
PVDD, AVDD, and CP. In the event of an undervoltage, the FAULT pin is asserted and the I2C register is
updated, depending on which voltage caused the event. Power-on-reset (POR) occurs when PVDD drops
low enough. A POR event causes the I2C to go into a high-impedance state. After the device recovers from
the POR event, the device must be re-initialized via I2C.
7. Overvoltage (OV) and Load Dump—The OV protection detects high voltages on PVDD. If PVDD reaches
the overvoltage threshold, the FAULT pin is asserted and the I2C register is updated. If the voltage increases
beyond the load dump threshold of 29 Vdc, the device shuts down and must be restarted once the voltage
returns to a safe value. After the device recovers from the
Ⅹ load dump event, the device must be
re-initialized via I2C. The TAS5414A and TAS5424A can withstand 50-V load-dump voltage spikes (see
Figure 15). Also depicted in this graph are the voltage thresholds for normal operation region, overvoltage
operation region, and load-dump protection region. Figure 13 shows the regions of operating voltage and the
profile of the load dump event. Battery charger voltages from 25 V to 35 V can be withstood for up to 1 hour.
Copyright 2009–2010, Texas Instruments Incorporated
19
相关PDF资料 |
PDF描述 |
|---|---|
| TAS5424ATPHDRMQ1 | 116 W, 4 CHANNEL, AUDIO AMPLIFIER, PQFP64 |
| TAS5424ATPHDRQ1 | 116 W, 4 CHANNEL, AUDIO AMPLIFIER, PQFP64 |
| TAS5424TDKDQ1 | 116 W, 4 CHANNEL, AUDIO AMPLIFIER, PDSO44 |
| TAS5424TDKDRQ1 | 116 W, 4 CHANNEL, AUDIO AMPLIFIER, PDSO44 |
| TAS5424TDKDQ1G4 | 116 W, 4 CHANNEL, AUDIO AMPLIFIER, PDSO44 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TAS5424ATPHDRMQ1 | 制造商:TI 制造商全称:Texas Instruments 功能描述:FOUR-CHANNEL AUTOMOTIVE DIGITAL AMPLIFIERS |
| TAS5424ATPHDRQ1 | 制造商:TI 制造商全称:Texas Instruments 功能描述:FOUR-CHANNEL AUTOMOTIVE DIGITAL AMPLIFIERS |
| TAS5424BQ1DKDEVM | 功能描述:音频 IC 开发工具 TAS5424BQ1DKD 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 |
| TAS5424BTDKDQ1 | 制造商:Texas Instruments 功能描述:- Trays |
| TAS5424BTDKDRQ1 | 功能描述:音频放大器 Four-CH Auto Digital Amps 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 |
发布紧急采购，3分钟左右您将得到回复。