參數(shù)資料
型號(hào)： TDA8552T
廠商： NXP SEMICONDUCTORS
元件分類： 音頻控制
英文描述： 2 x 1.4 W BTL audio amplifiers with digital volume control and headphone sensing
中文描述： 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO20
封裝： PLASTIC, SO-20
文件頁(yè)數(shù)： 7/28頁(yè)
文件大?。?/td> 254K
代理商： TDA8552T
1998 Jun 02
7
Philips Semiconductors
Preliminary specification
2
×
1.4 W BTL audio amplifiers with digital
volume control and headphone sensing
TDA8552T; TDA8552TS
Mode select pin
The device is in the standby mode (with a very low current
consumption) if the voltage at the MODE pin is between
V
DD
and V
DD
0.5 V. At a mode select voltage level of less
than 0.5 V the amplifier is fully operational. In the range
between 1 V and V
DD
1 V the amplifier is in the mute
condition. The mute condition is useful for using it as a ‘fast
mute’, in this mode the output signal is suppressed, while
the volume setting remains at its value. It is advised to
keep the device in the mute condition while the input
capacitor is being charged. This can be achieved by
holding the MODE pin at a level of 0.5V
DD
, or by waiting
approximately 100 ms before giving the first volume-UP
pulses.
Headphone sense pin (HPS)
A headphone can be connected to the amplifier by using a
coupling capacitor for each channel. The common ground
pin of the headphone is connected to the ground of the
amplifier, see Fig.4. By using the HPS pin as illustrated in
Fig.4, the TDA8552T detects if a headphone jack plug is
inserted into the connector.
When no headphone is plugged in, the voltage level at the
HPS pin will remain LOW. A voltage less than V
DD
1 V at
the HPS pin will keep the device in the BTL mode, thus the
loudspeakers can be operational. If the HPS pin is not
connected then the device will remain in the BTL mode.
When a headphone is plugged into the connector, the
voltage at the HPS pin will be set to V
DD
. The device then
switches to the Single-Ended (SE) mode, this means that
the slave power amplifiers at the outputs OUT1
and
OUT2
will be switched to the standby mode. This results
in floating outputs OUT1
and OUT2
, the loudspeaker
signal is thus attenuated by approximately 80 dB and only
the headphone can operate.
One of the benefits of this system is that the loudspeaker
current does not flow through the jack connector switch,
which could give some output power loss. The other
benefit is that the quiescent current is reduced when the
headphone jack is inserted.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TDA8552T/N1,512 功能描述:音頻放大器 AUDIO PWR AMP BTL 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
TDA8552T/N1,518 功能描述:音頻放大器 2X1W CMOS AMP + VOL 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
TDA8552T/N1.112 制造商:NXP Semiconductors 功能描述:AMP AUDIO POWER DUAL 8552 SOIC20
TDA8552T_02 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:2 x 1.4 W BTL audio amplifiers with digital volume control and headphone sensing
TDA8552TD 功能描述:音頻放大器 AUDIO PWR AMP BTL 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
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