TDA7572TR STMicroelectronics, TDA7572TR Datasheet - Page 48

• Manufacturer Part Number: TDA7572TR
• Description: IC AMP PWM 200W BRIDGE 64HIQUAD
• Manufacturer: STMicroelectronics
• Type: Class Dr

Specifications of TDA7572TR

• Output Type: 1-Channel (Mono)
• Voltage - Supply: 8 V ~ 58 V
• Features: Digital Inputs, I²C, I²S, Mute, Short-Circuit and Thermal Protection, Standby
• Mounting Type: Surface Mount
• Package / Case: 64-HiQUAD
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Max Output Power X Channels @ Load: -

Diagnostics
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10.1
10.1.1
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Diagnostics
Diagnostics are grouped into two categories, those performed only during standby, and
those available during amplifier operation.
When Mode[1:0] indicate the I
the Faults1 register) to initiate diagnostics.
When Mode[1:0]indicate the I
determine if the diagnostics should be run automatically during power-up
Diagnostics performed during power-up (Power Up Diagnostic or PUD, sometimes called
"Turn-on-diagnostics") are:
1.
2.
3.
4.
During operation the following conditions are continuously monitored:
1.
2.
3.
4.
5.
6.
Faults are reported in a simple manner for bus free operation. The open drain WS/Clip_L pin
asserts when clipping occurs, and the Address0/Fault_L pin asserts if any there are any
other faults. In case of busfree operation the Address0/Fault is the logical OR of all fault
conditions. When I
the diagnostics being performed via TDA7572's registers, Address0/Fault_L is used to
determine which one has to be the I
it is used to assert when clipping occurs. In this case the Address0 of I
automatically set to zero, which implies that only two TDA7572 can be addressed. In any
Mode case a clipping output is present.
The detailed procedure implemented to manage these faults follows:
Faults during operation:
DC offset across the speaker
I
register Faults2 is set and the external FET's are tristated. The bit is cleared using the
W1TC procedure. Resetting the bit removes the tristate mode and modulator operation is
restored
No I
Address0/Fault_L pin. In order to restart the system is necessary to pass through standby
mode.
2
Cbus: If the module of VHOUTF1 - VHOUTF2 > 3Vfor more then 100ms the Offset bit in
2
Output shorted to ground
Output shorted to Vs
Shorted transducer
Open Transducer
DC offset across the speaker
Die temperature
External temperature
Output Clipping
Output overcurrent
Power supply overcurrent
Cbus: Operation is as above except the fault is also reported by asserting the
2
C bus is present, one can read detailed fault status, as well as control
2
2
C is not active, the state of Mode[1:0] are further decoded to
C is active, the RunDiag bit must be set (by an I
2
C bus Address0 of this IC or, in case of DAC operation,
2
C bus address is
2
C write to
TDA7572