參數(shù)資料
型號(hào)： MAX9752CETI+
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 14/29頁(yè)
文件大小： 0K
描述： IC AMP AUDIO PWR 1.7W D 28TQFN
標(biāo)準(zhǔn)包裝： 60
系列： DirectDrive®
類(lèi)型： D 類(lèi)
輸出類(lèi)型： 2-通道（立體聲）帶立體聲耳機(jī)
在某負(fù)載時(shí)最大輸出功率 x 通道數(shù)量： 1.7W x 2 @ 4 歐姆; 62mW x 2 @ 16 歐姆
電源電壓： 4.5 V ~ 5.5 V
特點(diǎn)： 消除爆音，短路保護(hù)和熱保護(hù)，關(guān)機(jī)，音量控制
安裝類(lèi)型： 表面貼裝
供應(yīng)商設(shè)備封裝： 28-TQFN-EP（5x5）
封裝/外殼： 28-WFQFN 裸露焊盤(pán)
包裝： 管件
Click-and-Pop Suppression
The MAX9752/MAX9753/MAX9754 feature Maxim’s
comprehensive, industry-leading click-and-pop sup-
pression eliminating audible transients at startup. The
Turn-On and Turn-Off Response waveforms in the
Typical Operating Characteristics show that there are
minimal spectral components in the audible range at
the output upon startup and shutdown.
Applications Information
Compatibility with
MAX9750/MAX9751/MAX9755
The MAX9752/MAX9753/MAX9754 provide a high-effi-
ciency, Class D speaker driver with very low EMI (see
the Typical Operating Characteristics). If a Class AB
output is desired, the MAX9750/MAX9751/MAX9755
can be substituted. The MAX9750, MAX9751, and
MAX9755 are pin-for-pin compatible with the MAX9752,
MAX9753, and MAX9754, respectively.
Filterless Operation
The MAX9752/MAX9753/MAX9754 do not require an
output filter in most applications. The devices rely on
the inherent inductance of the speaker coil and the nat-
ural filtering of both the speaker and the human ear to
recover the audio component of the square-wave out-
put. Eliminating the output filter results in a smaller, less
costly, more efficient solution.
Voice coil movement due to the square-wave frequency
is very small because the switching frequency is well
beyond the bandwidth of speakers. Although this move-
ment is small, a speaker not designed to handle the
additional power can be damaged. Use a speaker with a
series inductance > 30H for optimum results. Typical
8
Ω speakers exhibit series inductances in the 30H to
100H range. Highest efficiency is achieved with speak-
er inductances > 60H.
Power Dissipation and Heat Sinking
Because the MAX9752/MAX9753/MAX9754 have high-
efficiency, Class D speaker drivers, the intrinsic pack-
age power dissipation capabilities are sufficient for
cooling. No special heatsinking is needed in normal
operating conditions.
Headphone Amplifier Output Power
The headphone amplifiers have been specified for the
worst-case scenario—when both inputs are in-phase.
Under this condition, the drivers simultaneously draw cur-
rent 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
maximum attainable output power. Figure 12 shows the
two cases for in- and out-of-phase. In reality, the available
power lies between these extremes.
MAX9752/MAX9753/MAX9754
2.2W, Low-EMI, Stereo, Class D Power Amplifiers
with DirectDrive Headphone Amplifiers
______________________________________________________________________________________
21
MAX9752
RS3
47k
Ω
BEEP
0.47
μF
SOURCE 3
RS2
47k
Ω
0.47
μF
SOURCE 2
RS1
47k
Ω
0.47
μF
SOURCE 1
RINT
47k
Ω
BIAS
WINDOW
DETECTOR
(0.4VP-P THRESHOLD)
FREQUENCY
DETECTOR
(300Hz THRESHOLD)
SPEAKER/HEADPHONE
AMPLIFIER INPUTS
VOUT(BEEP)
Figure 11. MAX9752 Beep Summing Circuit
OUTPUT POWER (mW)
THD+N
(%)
125
100
75
50
25
0.01
0.1
1
10
100
1000
0.001
0150
VDD = 5V
RL = 16
Ω
AV = 3dB
OUTPUTS IN-PHASE
OUTPUTS 180
° OUT-OF-PHASE
Figure 12. THD+N vs. POUT with Headphone Output Signals
In- and Out-of-Phase
相關(guān)PDF資料
PDF描述
MAX9752BETI+ IC AMP AUDIO PWR 2.2W D 28TQFN
MAX9752AETI+ IC AMP AUDIO PWR 2.2W D 28TQFN
MAX9755ETI+ IC AMP AUDIO PWR 2.6W AB 28TQFN
VE-B3P-MW-S CONVERTER MOD DC/DC 13.8V 100W
V110A3V3H150B3 CONVERTER MOD DC/DC 3.3V 150W
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX9752CETI+ 功能描述:音頻放大器 Integrated Circuits (ICs) 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
MAX9752CETI+T 功能描述:音頻放大器 Integrated Circuits (ICs) 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
MAX9753ETI+ 功能描述:音頻放大器 Integrated Circuits (ICs) 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
MAX9753ETI+T 功能描述:音頻放大器 Integrated Circuits (ICs) 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
MAX9754ETI+ 功能描述:音頻放大器 Integrated Circuits (ICs) 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
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