參數(shù)資料
型號(hào)： MAX9759
廠商： Maxim Integrated Products, Inc.
元件分類： 運(yùn)動(dòng)控制電子
英文描述： 3.2W, High-Efficiency, Low-EMI, Filterless, Class D Audio Amplifier
中文描述： 3.2W、高效、低EMI、無(wú)需濾波、D類音頻放大器
文件頁(yè)數(shù)： 11/20頁(yè)
文件大?。?/td> 957K
代理商： MAX9759
M
3.2W, High Efficiency, Low-EMI, Filterless,
Class D Audio Amplifier
______________________________________________________________________________________
11
Spread-Spectrum Modulation (SSM) Mode
The MAX9759 features a unique, patented spread-spec-
trum mode that reduces peak component energy in the
wideband spectrum, improving EMI emissions that may
be radiated by the speaker and cables by 5dB.
Proprietary techniques ensure that the cycle-to-cycle
variation of the switching period does not degrade audio
reproduction or efficiency (see the
Typical Operating
Characteristics
). Select SSM mode by setting SYNC =
V
DD
. In SSM mode, the switching frequency varies by
±70kHz around the center frequency (1.2MHz). The
modulation scheme remains the same, but the period of
the sawtooth waveform changes from cycle to cycle
(Figure 2). Instead of a large amount of spectral energy
present at multiples of the switching frequency, the ener-
gy is now spread over a bandwidth that increases with
frequency. Above a few megahertz, the wideband spec-
trum looks like white noise for EMI purposes (Figure 3).
OUT+
OUT-
V
IN-
V
IN+
V
OUT+
- V
OUT-
t
ON(MIN)
t
SW
Figure 1. MAX9759 Outputs with an Input Signal Applied
SYNC INPUT
GND
FLOAT
V
DD
Clocked
MODE
FFM with f
S
= 1100kHz
FFM with f
S
= 1500kHz
SSM with f
S
= 1200kHz
±
70kHz
FFM with f
S
= external clock frequency
Table 1. Operating Modes
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX9759ETE+ 功能描述:音頻放大器 3.2W Low-EMI Class D Amplifier 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
MAX9759ETE+T 功能描述:音頻放大器 3.2W Low-EMI Class D Amplifier 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
MAX9759EUE+ 制造商:Maxim Integrated Products 功能描述:- Rail/Tube
MAX9759EUE+T 制造商:Maxim Integrated Products 功能描述:AUD AMP SPKR 1CH MONO 4.3W CLS-D 16TSSOP - Tape and Reel
MAX9759EVKIT 功能描述:音頻放大器 Evaluation Kit for the MAX9759 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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