TDA7801 datasheet(21/48 Pages) STMICROELECTRONICS

Part #	TDA7801

Description	Digital input quad power amplifier with built-in diagnostics features

PDF	48 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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21 / 48 page

DocID022674 Rev 4

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TDA7801

Operation mode

The device has three main operation modes:



Standby mode



Tristate mode



Amplifier mode

4.1

Standby mode

When the ENABLE pin is low the device is in standby-mode. The current consumption is

ISB.

4.2

Tristate mode

When the ENABLE pin is high and the bit D7 of register DB0 is low the device is in tristate-

mode. In that state the amplifier outputs are "high impedance", the I2C bus is ready to

receive command.

4.3

Amplifier mode

When the ENABLE pin is high and the bit D7 of register DB0 is high the device is in

amplifier-mode ready to play. To move the device in that state it is enough to write '1' on bit

D7 of register IB1 from tristate-mode. Note that the device starts with all channels muted by

default (see I2C registers description, Section 9).

TDA7801 Datasheet(PDF) 21 Page - STMicroelectronics