TDA7575B Datasheet, PDF (20/32 Pages) STMicroelectronics – 2 x 75W multifunction dual-bridge power amplifier with integrated digital diagnostics

Software specifications
TDA7575B
Table 7.
D7
D6
D5
D4
D3
D2
D1
D0
IB2
0
0
0
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)
If R/W = 1, the TDA7575B sends 2 "Diagnostics Bytes" to μP: DB1 and DB2.
Table 8. DB1
D7 Thermal warming (if Tchip ≥ 150°C, D7 = 1)
Diag. cycle not activated or not terminated (D6 = 0)
D6
Diag. cycle terminated (D6 = 1)
Channel 1
Channel LF
current detection IB2 (D0) = 0
current detection IB2 (D0) = 1
D5
Output peak current < 250 mA - Open load (D5 = 1) Output peak current < 125 mA - Open load (D5 = 1)
Output peak current > 500 mA - Normal load (D5 = 0) Output peak current > 250 mA - Normal load (D5 = 0)
Channel 1
D4 Turn-on diagnostic (D4 = 0)
Permanent diagnostic (D4 = 1)
Channel 1
D3 Normal load (D3 = 0)
Short load (D3 = 1)
Channel 1
Turn-on diag.: No open load (D2 = 0)
D2 Open load detection (D2 = 1)
Offset diag.: No output offset (D2 = 0)
Output offset detection (D2 = 1)
Channel 1
D1 No short to V_cc (D1 = 0)
Short to V_cc (D1 = 1)
Channel 1
D0 No short to GND (D1 = 0)
Short to GND (D1 = 1)
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