MAX9700AETB

更新时间： 2024-01-27 12:39:18

品牌	Logo	应用领域
美信 - MAXIM		音频放大器
页数	文件大小	规格书
19页	533K
描述
1.2W, Low-EMI, Filterless, Class D Audio Amplifier

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MAX9700AETB 数据手册

1.2W, Low-EMI, Filterless,

Class D Audio Amplifier

IN-

IN+

OUT-

OUT+

ON(MIN)

- V

OUT-

OUT+

Figure 1. MAX9700 Outputs with an Input Signal Applied

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.

Table 1. Operating Modes

SYNC INPUT

GND

MODE

FFM with f = 1100kHz

FLOAT

FFM with f = 1450kHz

SSM with f = 1220kHz 120kHz

Clocked

FFM with f = external clock frequency

Filterless Modulation/Common-Mode Idle

The MAX9700 uses Maxim’s unique, patented modula-

tion 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

output a 50% duty cycle square wave when no signal is

present. With no filter, the square wave appears across

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

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1...6 7 8910 11 12...19

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MAX9700BEBC+T	MAXIM	获取价格	1.2W, Low-EMI, Filterless, Class D Audio Amplifier