參數(shù)資料
型號(hào)： MAX4410EUD+
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 6/20頁(yè)
文件大?。?/td> 0K
描述： IC AMP AUDIO .08W STER 14TSSOP
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 96
系列： DirectDrive®
類(lèi)型： AB 類(lèi)
輸出類(lèi)型： 耳機(jī)，2-通道（立體聲）
在某負(fù)載時(shí)最大輸出功率 x 通道數(shù)量： 80mW x 2 @ 16 歐姆
電源電壓： 1.8 V ~ 3.6 V
特點(diǎn)： 消除爆音，短路保護(hù)和熱保護(hù)，關(guān)閉
安裝類(lèi)型： 表面貼裝
供應(yīng)商設(shè)備封裝： 14-TSSOP
封裝/外殼： 14-TSSOP（0.173"，4.40mm 寬）
包裝： 管件
產(chǎn)品目錄頁(yè)面： 1390 (CN2011-ZH PDF)
MAX4410
80mW, DirectDrive Stereo Headphone Driver
with Shutdown
14
______________________________________________________________________________________
Shutdown
The MAX4410 features two shutdown controls allowing
either channel to be shut down or muted independently.
SHDNL controls the left channel while SHDNR controls
the right channel. Driving either SHDN_ low disables the
respective channel, sets the driver output impedance to
about 1k
, and reduces the supply current to less than
10A. When both SHDN_ inputs are driven low, the
charge pump is also disabled, further reducing supply
current draw to 6A. The charge pump is enabled once
either SHDN_ input is driven high.
Click-and-Pop Suppression
In traditional single-supply audio drivers, the output-
coupling capacitor is a major contributor of audible
clicks and pops. Upon startup, the driver charges the
coupling capacitor to its bias voltage, typically half the
supply. Likewise, on shutdown the capacitor is dis-
charged to GND. This results in a DC shift across the
capacitor, which in turn, appears as an audible transient
at the speaker. Since the MAX4410 does not require
output-coupling capacitors, this does not arise.
Additionally, the MAX4410 features extensive click-and-
pop suppression that eliminates any audible transient
sources internal to the device. The Power-Up/Down
Waveform in the Typical Operating Characteristics
shows that there are minimal spectral components in the
audible range at the output upon startup or shutdown.
In most applications, the output of the preamplifier dri-
ving the MAX4410 has a DC bias of typically half the
supply. At startup, the input-coupling capacitor is
charged to the preamplifier’s DC-bias voltage through
the RF of the MAX4410, resulting in a DC shift across
the capacitor and an audible click/pop. Delaying the
rise of the MAX4410’s SHDN_ signals 4 to 5 time con-
stants (200ms to 300ms) based on RIN and CIN relative
to the start of the preamplifier eliminates this click/pop
caused by the input filter.
Applications Information
Power Dissipation
Under normal operating conditions, linear power ampli-
fiers can dissipate a significant amount of power. The
maximum power dissipation for each package is given
in the Absolute Maximum Ratings section under
Continuous Power Dissipation or can be calculated by
the following equation:
where TJ(MAX) is +150°C, TA is the ambient tempera-
ture, and
θJA is the reciprocal of the derating factor in
°C/W as specified in the Absolute Maximum Ratings
section. For example,
θJA of the TSSOP package is
+109.9°C/W.
The MAX4410 has two sources of power dissipation,
the charge pump and the two drivers. If the power dis-
sipation for a given application exceeds the maximum
allowed for a given package, either reduce VDD,
increase load impedance, decrease the ambient tem-
perature, or add heat sinking to the device. Large out-
put, supply, and ground traces improve the maximum
power dissipation in the package.
Thermal overload protection limits total power dissipa-
tion in the MAX4410. When the junction temperature
exceeds +140°C, the thermal protection circuitry dis-
ables the amplifier output stage. The amplifiers are
enabled once the junction temperature cools by 15°C.
This results in a pulsing output under continuous ther-
mal overload conditions.
Output Power
The device has been specified for the worst-case sce-
nario— when both inputs are in phase. Under this con-
dition, the drivers simultaneously draw current from the
charge pump, leading to a slight loss in headroom of
VSS. In typical stereo audio applications, the left and
right signals have differences in both magnitude and
phase, subsequently leading to an increase in the max-
imum attainable output power. Figure 4 shows the two
extreme cases for in and out of phase. In reality, the
available power lies between these extremes.
P
TT
DISSPKG MAX
J MAX
A
JA
()
=
θ
100
10
1
0.1
0.01
0.001
0
100
150
50
200
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. OUTPUT POWER
MAX4410
fig04
OUTPUT POWER (mW)
VDD = 3V
AV = -1V/V
RL = 16
fIN = 10kHz
THD
+
N
(%)
OUTPUTS IN
PHASE
ONE
CHANNEL
OUTPUTS
180
° OUT OF
PHASE
Figure 4. Output Power vs. Supply Voltage with Inputs In/Out
of Phase
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX4410EUD+ 功能描述:音頻放大器 80mW DirectDrive Stereo Headphone Amp RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)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
MAX4410EUD+T 功能描述:音頻放大器 80mW DirectDrive Stereo Headphone Amp RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)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
MAX4410EUD-T 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(lèi)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
MAX4410EVKIT 功能描述:音頻 IC 開(kāi)發(fā)工具 MAX4410 Eval Kit RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類(lèi)型:Audio Amplifiers 工具用于評(píng)估:TAS5614L 工作電源電壓:12 V to 38 V
MAX4411BEBE 制造商:Maxim Integrated Products 功能描述:80MW 2V/V FIXED GAIN DIRECTDRIVE HP - Rail/Tube
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