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參數(shù)資料
| 型號(hào)： | TPA3100D2RGZR-P |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 21.8 W, 2 CHANNEL, AUDIO AMPLIFIER, PQCC48 |
| 封裝： | 7 X 7 MM, GREEN, PLASTIC, QFN-48 |
| 文件頁數(shù)： | 18/39頁 |
| 文件大?。?/td> | 1298K |
| 代理商： | TPA3100D2RGZR-P |
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MUTE
FAULT
ExternalGPIO
Control
TPA3100D2
MSTR/SLV and SYNC operation
USING LOW-ESR CAPACITORS
SHORT-CIRCUIT PROTECTION AND AUTOMATIC RECOVERY FEATURE
SLOS469E – OCTOBER 2005 – REVISED MAY 2007
Figure 34. External MUTE Control
The MSTR/SLV and SYNC terminals can be used to synchronize the frequency of the class-D output switching.
When the MSTR/SLV terminal is high, the output switching frequency is determined by the selection of the
resistor connected to the ROSC terminal (see ROSC Resistor Selection). The SYNC terminal becomes an
output in this mode, and the frequency of this output is also determined by the selection of the ROSC resistor.
This TTL compatible, push-pull output can be connected to another TPA3100D2, configured in the slave mode.
The output switching is synchronized to avoid any beat frequencies that could occur in the audio band when two
class-D amplifiers in the same system are switching at slightly different frequencies.
When the MSTR/SLV terminal is low, the output switching frequency is determined by the incoming square wave
on the SYNC input. The SYNC terminal becomes an input in this mode and accepts a TTL compatible square
wave from another TPA3100D2 configured in the master mode or from an external GPIO. If connecting to an
external GPIO, recommended frequencies are 200 kHz to 300 kHz for proper device operation, and the
maximum amplitude is 4 V.
Low-ESR capacitors are recommended throughout this application section. A real (as opposed to ideal)
capacitor can be modeled simply as a resistor in series with an ideal capacitor. The voltage drop across this
resistor minimizes the beneficial effects of the capacitor in the circuit. The lower the equivalent value of this
resistance, the more the real capacitor behaves like an ideal capacitor.
The TPA3100D2 has short-circuit protection circuitry on the outputs that prevents damage to the device during
output-to-output shorts, output-to-GND shorts, and output-to-VCC shorts. When a short circuit is detected on the
outputs, the part immediately disables the output drive. This is a latched fault and must be reset by cycling the
voltage on the SHUTDOWN pin or MUTE pin. This clears the short-circuit flag and allows for normal operation if
the short was removed. If the short was not removed, the protection circuitry again activates.
The FAULT terminal can be used for automatic recovery from a short-circuit event, or used to monitor the status
with an external GPIO. For automatic recovery from a short-circuit event, connect the FAULT terminal directly to
the MUTE terminal. When a short-circuit event occurs, the FAULT terminal transitions high indicating a
short-circuit has been detected. When directly connected to MUTE, the MUTE terminal transitions high, and
clears the internal fault flag. This causes the FAULT terminal to cycle low, and normal device operation resumes
if the short-circuit is removed from the output. If a short remains at the output, the cycle continues until the short
is removed. If external MUTE control is desired, and automatic recovery from a short-circuit event is also
desired, an OR gate can be used to combine the functionality of the FAULT output and external MUTE control,
see Figure 34.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPA3100D2RGZT | 功能描述:音頻放大器 20 W Stereo Class-D Audio 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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA3100D2RGZT | 制造商:Texas Instruments 功能描述:IC AMP AUDIO PWR 21.8W D 48VQFN |
| TPA3100D2RGZTG4 | 功能描述:音頻放大器 20 W Stereo Class-D Audio 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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA3101D2 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:10-W STEREO CLASS-D AUDIO POWER AMPLIFIER |
| TPA3101D2_07 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:10-W STEREO CLASS-D AUDIO POWER AMPLIFIER |
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