參數(shù)資料
型號(hào)： LM4831
廠商： National Semiconductor Corporation
英文描述： Multimedia Computer Audio Chip
中文描述： 多媒體計(jì)算機(jī)音頻芯片
文件頁(yè)數(shù)： 6/12頁(yè)
文件大?。?/td> 575K
代理商： LM4831
Pin Descriptions
(Continued)
PWRDWN
This pin is used to power down the
entire IC (except BEEP Circuitry).
Placing a logic high on the PWRDWN
pin will place the LM4831 in a low
supply current state. To minimize the
shutdown-mode supply current, the
PWRDWN pin should be pulled up to
the voltage on the LM4831 power
supply pins. The PWRDWN pin is
overridden if an edge change occurs
on any of the BEEP A–D inputs.
L_INA,
L_INB,
L_INC
These pins are the left channel inputs.
Typical input impedance on each input
is 20 k
.
R_INA,
R_INB,
R_INC
These pins are the right channel
inputs. Typical input impedance on
each input is 20 k
.
L_MIX,
R_MIX
These pins are the inverting input
nodes of the input mixer for the left
and right channel, respectively.
L_EQOUT,
R_EQOUT
These are the outputs of the input
mixer for the left and right channel,
respectively. This output is generally
fed to an external filter to equalize the
response of internal computer
speakers and then back into the EQIN
pins.
L_EQIN,
R_EQIN
These pins are one of the two inputs
to the 2:1 analog multiplexer and are
used to feed in externally filtered
versions of the EQOUT signals. The
2:1 multiplexer selects the signal on
L_EQIN and R_EQIN if the HP_IN
and DS_IN pins are both low.
L_MUX,
R_MUX
These are the stereo outputs of the
2:1 analog multiplexer. The output of
the 2:1 multiplexer is decided by the
state of the HP-IN and DS-IN pins. If
both HP-IN and DS-IN are low, the 2:1
mux selects the analog input on the
EQIN pins. If either HP-IN or DS-IN is
high, the 2:1 mux selects the internal
analog path. See .
L_LINEOUT,
R_LINEOUT
These are the line outputs for the left
and right channel, respectively.
Although these outputs are capable of
driving a wide range of resistive loads,
they are typically used to drive an
impedance of at least 10 k
. These
outputs are only enabled when the
DS-IN pin is high, otherwise, they are
in a high-impedance state.
L_PA+IN,
R_PA+IN
These pins are the positive inputs of
the output audio power amplifiers.
Since the power amplifier is typically
configured as an inverting amplifier,
these pins should be connected to the
BYPASS pin to properly bias the
output power amplifiers. Further, these
pins should be individually bypassed
with a capacitor of 0.01 μF–0.1 μF.
L_PAIN,
R_PAIN
These pins are the inverting inputs for
the output audio power amplifier for
the left and right channel, respectively.
L_PAOUT,
R_PAOUT
These pins are the inverted power
amp outputs for the left and right
channel, respectively. In bridged mode
(DS-IN = HP_IN = PWRDWN = low),
each output drives one terminal of a
direct coupled bridged speaker. In
single-ended (headphone) mode,
(HP_IN = high, PWRDWN = low,
DS-IN = N/A) these outputs drive a
capacitively coupled stereo
headphone. In docking station mode
(DS-IN = high, HP_IN = PWRDWN =
low), these outputs are disabled.
L_PA+OUT,
R_PA+OUT
These pins are the non-inverted power
amp outputs for the left and right
channel, respectively. In bridged mode
(DS-IN = HP_IN = PWRDWN = low),
each output drives one terminal of a
direct coupled bridged speaker. In
single-ended (headphone) mode
(HP_IN = high, PWRDWN = low,
DS-IN = N/A), these outputs are in a
high impedance state, effectively
muting the bridged loudspeaker. In
docking station mode (DS-IN = high,
HP_IN = PWRDWN = low), these
outputs are disabled.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM4831 WAF 制造商:Texas Instruments 功能描述:
LM48310 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Ultra-Low EMI, Filterless, 2.6W, Mono, Class D Audio Power Amplifier with E2S
LM48310SD 制造商:Texas Instruments 功能描述:Audio Amp Speaker 1-CH Mono 2.6W Class-D 10-Pin LLP EP T/R
LM48310SD/NOPB 功能描述:音頻放大器 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
LM48310SDBD 功能描述:音頻 IC 開發(fā)工具 LM48310SD EVAL BOARD RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評(píng)估:TAS5614L 工作電源電壓:12 V to 38 V
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