參數(shù)資料
型號(hào): MAX97003EWP+T
廠商: Maxim Integrated Products
文件頁數(shù): 16/48頁
文件大?。?/td> 0K
描述: IC AUDIO SUBSYSTEM LN 20WLP
標(biāo)準(zhǔn)包裝: 2,500
類型: D 類;H 類
輸出類型: 1-通道(單聲道)或 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: 1W x 2 @ 8 歐姆
電源電壓: 2.7 V ~ 5.5 V
特點(diǎn): 消除爆音,差分輸入,關(guān)閉
安裝類型: *
供應(yīng)商設(shè)備封裝: *
封裝/外殼: *
包裝: *
Maxim Integrated Products 23
MAX97003
High-Efficiency, Low-Noise Audio Subsystem
Figure 2. Stereo Single-Ended and Differential Input Configurations
Figure 3. EMI with 12in of Speaker Cable
Ultra-Low EMI Filterless Output Stage
Traditional Class D amplifiers require the use of external
LC filters or shielding to meet EN55022B electromag-
netic-interference (EMI) regulation standards. Maxim’s
patented active emissions limiting edge-rate control
circuitry and spread-spectrum modulation reduces EMI
emissions, while maintaining up to 93% efficiency.
Maxim’s spread-spectrum modulation mode flattens
wideband spectral components, while proprietary tech-
niques ensure that the cycle-to-cycle variation of the
switching period does not degrade audio reproduction or
efficiency. The IC’s spread-spectrum modulator random-
ly varies the switching frequency by Q10kHz around the
center frequency (300kHz). Above 10MHz, the wideband
spectrum looks like noise for EMI purposes. See Figure 3.
R
IN_2 (R)
STEREO SINGLE-ENDED
L
IN_1 (L)
IN_2 (+)
DIFFERENTIAL
IN_1 (-)
TO MIXER
FREQUENCY (MHz)
EMISSION
LEVEL
(dBV/m)
900
800
600 700
200 300 400 500
100
10
30
50
70
90
-10
0
1000
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