TDA7564BPD View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

TDA7564BPD

4 x 50W multifunction quad power amplifier with built-in diagnostics features

STMicroelectronics 

TDA7564B

10 Examples of bytes sequence

Examples of bytes sequence

1 - Turn-on diagnostic - Write operation

Start Address byte with D0 = 0 ACK IB1 with D6 = 1 ACK IB2 ACK STOP

2 - Turn-on diagnostic - Read operation

Start Address byte with D0 = 1 ACK DB1 ACK DB2 ACK DB3 ACK DB4 ACK STOP

The delay from 1 to 2 can be selected by software, starting from 1 ms

3a - Turn-on of the power amplifier with 26dB gain, mute on, diagnostic defeat, High eff.

mode both channels.

.

Start Address byte with D0 = 0 ACK

IB1

ACK

IB2

ACK STOP

X000000X

XXX1X011

3b - Turn-off of the power amplifier

Start Address byte with D0 = 0 ACK

4 - Offset detection procedure enable

IB1

ACK

IB2

ACK STOP

X0XXXXXX

XXX0XXXX

Start

Address byte with D0 = 0

ACK

IB1

ACK

IB2

ACK STOP

XX1XX11X

XXX1X0XX

5 - Offset detection procedure stop and reading operation (the results are valid only for the

offset detection bits (D2 of the bytes DB1, DB2, DB3, DB4)

.

Start Address byte with D0 = 1 ACK DB1 ACK DB2 ACK DB3 ACK DB4 ACK STOP

● The purpose of this test is to check if a D.C. offset (2V typ.) is present on the outputs,

produced by input capacitor with anomalous leakage current or humidity between pins.

● The delay from 4 to 5 can be selected by software, starting from 1ms

6 - Current detection procedure start (the AC inputs must be with a proper signal that

depends on the type of load)

Start Address byte with D0 = 0 ACK

IB1

ACK

IB2

ACK STOP

XX01111X

XXX1X1XX

Current detection reading operation (the results valid only for the current sensor detection

bits - D5 of the bytes DB1, DB2, DB3, DB4)

.

Start Address byte with D0 = 1 ACK DB1 ACK DB2 ACK DB3 ACK DB4 ACK STOP

● During the test, a sinus wave with a proper amplitude and frequency (depending on the

loudspeaker under test) must be present. The minimum number of periods that are

needed to detect a normal load is 5.

● The delay from 6 to 7 can be selected by software, starting from 1ms.

29/34

Share Link: