TDA7575BPD datasheet(20/32 Pages) STMICROELECTRONICS

20 / 32 page

Software specifications

TDA7575B

20/32

Table 7.

IB2

If R/W = 1, the TDA7575B sends 2 "Diagnostics Bytes" to

μP: DB1 and DB2.

Table 8.

DB1

Stand-by on - Amplifier not working - (D4 = 0)

Stand-by off - Amplifier working - (D4 = 1)

Power Amplifier Mode Diagnostic (D3 = 0);

Line Driver Mode Diagnostic (D3 = 1)

Current Detection Diagnostic Enabled (D2 = 1)

Current Detection Diagnostic Defeat (D2 = 0)

Power amplifier working in standard mode (D1 = 0)

Power amplifier working in high efficiency mode (D1 = 1)

Current Detection Threshold HIGH (D7 =0)

Current Detection Threshold LOW (D7 =1)

Thermal warming (if Tchip

≥ 150°C, D7 = 1)

Diag. cycle not activated or not terminated (D6 = 0)

Diag. cycle terminated (D6 = 1)

Channel 1

current detection IB2 (D0) = 0

Output peak current < 250 mA - Open load (D5 = 1)

Output peak current > 500 mA - Normal load (D5 = 0)

Channel LF

current detection IB2 (D0) = 1

Output peak current < 125 mA - Open load (D5 = 1)

Output peak current > 250 mA - Normal load (D5 = 0)

Channel 1

Turn-on diagnostic (D4 = 0)

Permanent diagnostic (D4 = 1)

Channel 1

Normal load (D3 = 0)

Short load (D3 = 1)

Channel 1

Turn-on diag.: No open load (D2 = 0)

Open load detection (D2 = 1)

Offset diag.: No output offset (D2 = 0)

Output offset detection (D2 = 1)

Channel 1

No short to Vcc (D1 = 0)

Short to Vcc (D1 = 1)

Channel 1

No short to GND (D1 = 0)

Short to GND (D1 = 1)

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