TEA7530DP 查看數據表（PDF） - STMicroelectronics

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产品描述 (功能)

生产厂家

TEA7530DP

MONITOR AMPLIFIER

STMicroelectronics 

TEA7530

CIRCUIT DESCRIPTION

TEA7530 is a 8 pin DIP integrated circuit provid-

ing the following facilities:

♦ Loudspeaker amplifier

♦ Antidistortion feed-back system (limited line

current compensation)

1.1. LOUDSPEAKER AMPLIFIER

The amplifier is divided into 2 main sections.

- Automatic Gain Control (AGC)

- Push-pull amplifier (bridge structure)

Figure 9

a) The AGC section is used for the antidistortion

system.

♦When used in a telephone set to avoid larsen

effect the AGC automatically decreases loud-

speaker amplifier gain.

♦When the required output level exceeds the

capabilities of the available current, the AGC

decreases the loudspeaker amplifier gain to

avoids distortion.

b) The output amplifier uses a double push-pull

configuration (H bridge) to get maximum dynamic

range under limited supply conditions.

Figure 10

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