TDA7575B Datasheet, PDF (18/32 Pages) STMicroelectronics – 2 x 75W multifunction dual-bridge power amplifier with integrated digital diagnostics

I2C bus interface
TDA7575B
I²C PIN (PIN16) < 1.5V: I²C bus interface deactivated
I²C PIN (PIN16) > 2.5V: I²C bus interface activated
It is also possible to let I²C PIN floating to deactivate the I²C bus interface, or to short I²C
PIN to V_CC to activate it.
In particular:
I²C ENABLED: I²C pin (PIN16) > 2.5V
– STD MODE: V_stby (PIN5) > 3.5V, IB2(D1)=0
– HE MODE: V_stby (PIN5) > 3.5V, IB2(D1)=1
– PLAY MODE: V_mute (pin 4) >3.5V, IB1 (D2) = 1
The amplifier can always be switched off by putting V_stby to 0V, but with I²C enabled it can
be turn on only through I²C (with V_stby>3.5V).
I²C DISABLED: I²C pin (PIN16) < 1.5V
– STD MODE: 3.5V < st-by (PIN5) < 5
– HE MODE: V_stby (PIN5) > 7V
– PLAY MODE: V_mute (pin 4) >3.5V
For both STD and HE MODE the play/mute mode can be set acting on V_mute pin.
When I²C BUS is disabled, when a fault is detected PIN 14 (CD-OUT) is pulled down by the
internal logic circuitry. The faults detected are the short circuit to ground, to V_CC and across
the load (after an aver current detection).
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