參數(shù)資料
型號: MAX9700AEBC+T
廠商: Maxim Integrated Products
文件頁數(shù): 20/20頁
文件大小: 0K
描述: IC AMP AUDIO 1.6W MONO D 12UCSP
產(chǎn)品培訓模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標準包裝: 2,500
類型: D 類
輸出類型: 1-通道(單聲道)
在某負載時最大輸出功率 x 通道數(shù)量: 1.6W x 1 @ 6 歐姆
電源電壓: 2.5 V ~ 5.5 V
特點: 消除爆音,差分輸入,短路和熱保護,關(guān)閉
安裝類型: 表面貼裝
供應商設備封裝: 12-UCSP(3x4)
封裝/外殼: 12-WFBGA,WLCSP
包裝: 帶卷 (TR)
MAX9700
1.2W, Low-EMI, Filterless,
Class D Audio Amplifier
_______________________________________________________________________________________
9
scheme remains the same, but the period of the saw-
tooth waveform changes from cycle to cycle (Figure 2).
Instead of a large amount of spectral energy present at
multiples of the switching frequency, the energy is now
spread over a bandwidth that increases with frequency.
Above a few megahertz, the wideband spectrum looks
like white noise for EMI purposes (Figure 3).
External Clock Mode
The SYNC input allows the MAX9700 to be synchro-
nized to a system clock (allowing a fully synchronous
system), or allocating the spectral components of the
switching harmonics to insensitive frequency bands.
Applying an external TTL clock of 800kHz to 2MHz to
SYNC synchronizes the switching frequency of the
MAX9700. The period of the SYNC clock can be ran-
domized, enabling the MAX9700 to be synchronized to
another MAX9700 operating in SSM mode.
Filterless Modulation/Common-Mode Idle
The MAX9700 uses Maxim’s modulation scheme
that eliminates the LC filter required by traditional
class D amplifiers, improving efficiency, reducing
component count, and conserving board space
and system cost. Conventional class D amplifiers
Figure 1. MAX9700 Outputs with an Input Signal Applied
OUT+
OUT-
VIN-
VIN+
VOUT+ - VOUT-
tON(MIN)
tSW
SYNC INPUT
MODE
GND
FFM with fS = 1100kHz
UNCONNECTED
FFM with fS = 1450kHz
VDD
SSM with fS = 1220kHz
±120kHz
Clocked
FFM with fS = external clock frequency
Table 1. Operating Modes
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