TDA7808 datasheet(17/39 Pages) STMICROELECTRONICS

Part #	TDA7808

Description	High efficiency digital input automotive quad power amplifier, start stop compatible

PDF	39 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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17 / 39 page

DS12230 Rev 4

17/39

TDA7808

Operation states

TDA7808 functionality is regulated by means of a finite state machine.

Main states are:



Standby



ECO-mode



Amplifier mode

4.1

Standby state

When STBY pin is under VILSTBY voltage the amplifier is in stand-by state and the current

consumption is very low.

4.2

ECO-mode state

When STBY pin is over VIHSTBY the amplifier is in a state of low current absorption, the

ECO-mode. The short circuit protections are active and the amplifier is ready for receiving

commands from micro-controller through I2C interface.

Outputs and A3V3 supply are biased at 0 V.

4.3

Amplifier-mode state

When TDA7808 is in ECO-mode state, IB3-d0 is set to "1", (Amplifier-ON), and I2S clock is

present the amplifier moves to Amplifier-mode state.

The outputs are biased from 0 V to Vcc/2 and the current consumption reaches "Iq" level

until the amplifier is set in MUTE or in PLAY with low level signal. User can move the

amplifier from MUTE to PLAY and viceversa acting on IB2-d4, d3 bits.

A hardware unmute pin is available in PSO36 package only.

TDA7808 Datasheet(PDF) 17 Page - STMicroelectronics