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參數資料
| 型號： | TS4982IQT |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 2 W, 2 CHANNEL, AUDIO AMPLIFIER, QCC32 |
| 封裝： | 5 X 5 MM, ROHS COMPLIANT, QFN-32 |
| 文件頁數： | 17/31頁 |
| 文件大小： | 537K |
| 代理商： | TS4982IQT |
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Application information
TS4982
24/31
Doc ID 14527 Rev 2
4.10
Standby time
The time to disable the dedicated part into the standby mode since the level of the dedicated
standby pins are changed (HDEN from "1" to "0", SPKREN from "0" to "1") is called the
standby time. It is specified in the electrical characteristics in Table 7 on page 7.
4.11
Pop & click
Older generations of headphone drivers with single-ended outputs have a load connected in
series with a bulky capacitor (for instance 220
μF) to ground. With this type of configuration,
when the amplifier is turned on by a standby control pin, a time transient phenomena on the
load is present. This has been the main contribution to the unpleasant audible sound
currently called "pop effect".
Thanks to the negative charge pump the headphone outputs are referred to ground without
the need for bulky in-series capacitors. Therefore, the pop created by these bulky capacitors
is internally eliminated. In addition, the TS4982 include a pop & click circuitry which
suppresses any residual pop on the headphone and speaker outputs, thus enabling the
outputs to be virtually pop & click-free.
4.12
Headphone jack detection
The device incorporates a simple circuitry that can be used to enable the headphone
amplifier and disable the speaker amplifier by a headphone jack insertion.
Figure 45.
Headphone jack detection schematics
10K
HEADPHONE JACK
SPKREN
GND
RHP
LHP
Vcc
100K
HDEN
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TS4984 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:2 x 1W Stereo audio power amplifier with active low standby mode |
| TS4984EIJT | 功能描述:音頻放大器 2x1.2W stereo audio RoHS:否 制造商:STMicroelectronics 產品: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 |
| TS4984EIKJT | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:1.2W Stereo Audio Power Amplifier with Active Low Standby Mode |
| TS4984FC | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:1.2W Stereo Audio Power Amplifier with Active Low Standby Mode |
| TS4984IQT | 功能描述:音頻放大器 2x1W stereo audio Pwr amp RoHS:否 制造商:STMicroelectronics 產品: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 |
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