TDA7564BH STMicroelectronics, TDA7564BH Datasheet - Page 19

• Manufacturer Part Number: TDA7564BH
• Description: IC AMP QUAD MULTIFUNC FLEXIWATT2
• Manufacturer: STMicroelectronics
• Type: Class ABr

Specifications of TDA7564BH

• Output Type: 4-Channel (Quad)
• Max Output Power X Channels @ Load: 75W x 4 @ 2 Ohm
• Voltage - Supply: 8 V ~ 18 V
• Features: I²C, Mute, Short-Circuit and Thermal Protection, Standby
• Mounting Type: Through Hole
• Package / Case: 25-Flexiwatt (bent and staggered leads)
• Operational Class: Class-AB
• Audio Amplifier Output Configuration: 4-Channel Stereo
• Output Power (typ): 75x4@2OhmW
• Audio Amplifier Function: Speaker
• Input Offset Voltage: 100@14.4VmV
• Single Supply Voltage (typ): 14V
• Dual Supply Voltage (typ): Not RequiredV
• Power Supply Requirement: Single
• Power Dissipation: 85W
• Rail/rail I/o Type: No
• Single Supply Voltage (min): 8V
• Single Supply Voltage (max): 18V
• Dual Supply Voltage (min): Not RequiredV
• Dual Supply Voltage (max): Not RequiredV
• Operating Temp Range: -55C to 150C
• Operating Temperature Classification: Military
• Mounting: Through Hole
• Pin Count: 25
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

TDA7564B
5
5.1
Multiple faults
When more misconnections are simultaneously in place at the audio outputs, it is
guaranteed that at least one of them is initially read out. The others are notified after
successive cycles of I
This is true for both kinds of diagnostic (turn-on and permanent).
The table below shows all the couples of double-fault possible. It should be taken into
account that a short circuit with the 4 ohm speaker unconnected is considered as double
fault.
Table 5.
S. GND (so) / S. GND (sk) in the above table make a distinction according to which of the 2
outputs is shorted to ground (test-current source side= so, test-current sink side = sk). More
precisely, in Channels LF and RR, so = CH+, sk = CH-; in Channels LR and RF, so = CH-, sk
= CH+.
In permanent diagnostic the table is the same, with only a difference concerning open
load (*), which is not among the recognizable faults. Should an Open Load be present
during the device's normal working, it would be detected at a subsequent Turn on Diagnostic
cycle (i.e. at the successive car radio turn-on).
Faults availability
All the results coming from I
measurements inside a defined period of time. If the fault is stable throughout the whole
period, it will be sent out.
To guarantee always resident functions, every kind of diagnostic cycles (turn-on, permanent,
offset) will be reactivate after any I
new cycle will be able to start, but the read data will come from the previous diag. cycle (i.e.
The device is in turn-on state, with a short to GND, then the short is removed and micro
reads I
cycle. If another I
to observe a change in diagnostic bytes, two I
S. Across L.
S. GND (so)
S. GND (sk)
Open L.
S. Vs
2
C. The short to GND is still present in bytes, because it is the result of the previous
Double fault table for turn-on diagnostic
S. GND (so)
2
C reading operation occurs, the bytes do not show the short). In general
S. GND
2
C reading and faults removal, provided that the diagnostic is enabled.
/
/
/
/
2
C bus, by read operations, are the consequence of
Doc ID 12734 Rev 3
S. GND (sk)
2
S. GND
S. GND
C reading operation. So, when the micro reads the I
/
/
/
2
C reading operations are necessary.
S. Vs + S.
S. Vs
S. Vs
S. Vs
GND
/
/
S. Across L.
S. Across L.
S. GND
S. GND
S. Vs
/
Multiple faults
Open L. (*)
Open L. (*)
Open L.
S. GND
S. Vs
N.A.
2
19/34
C, a