TDA7563B STMicroelectronics, TDA7563B Datasheet - Page 16

• Manufacturer Part Number: TDA7563B
• Description: IC AMP QUAD MULTIFUNC FLEXIWATT2
• Manufacturer: STMicroelectronics
• Type: Class ABr

Specifications of TDA7563B

• 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: 27-Flexiwatt (bent and staggered leads)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Diagnostics functional description
4.2
16/33
Permanent diagnostics
Detectable conventional faults are:
The following additional features are provided:
The TDA7563B has 2 operating statuses:
1.
2.
Figure 25. Restart timing without diagnostic enable (permanent) - Each 1mS time, a
Figure 26. Restart timing with diagnostic enable (permanent)
–
–
–
–
Restart mode. The diagnostic is not enabled. Each audio channel operates
independently from each other. If any of the a.m. faults occurs, only the channel(s)
interested is shut down. A check of the output status is made every 1 ms
Restart takes place when the overload is removed.
Diagnostic mode. It is enabled via I
to cause the intervention of the short-circuit protection) occurs to the speakers outputs.
Once activated, the diagnostics procedure develops as follows
–
–
–
–
circuit protection intervention
circuit protection intervention
(i.e. short circuit to GND)
Overcurrent and short
(i.e. short circuit to GND)
Overcurrent and short
Short to GND
Short to Vs
Short across the speaker
Output offset detection
To avoid momentary re-circulation spikes from giving erroneous diagnostics, a
check of the output status is made after 1ms: if normal situation (no overloads) is
detected, the diagnostic is not performed and the channel returns back active.
Instead, if an overload is detected during the check after 1 ms, then a diagnostic
cycle having a duration of about 100 ms is started.
After a diagnostic cycle, the audio channel interested by the fault is switched to
restart mode. The relevant data are stored inside the device and can be read by
the microprocessor. When one cycle has terminated, the next one is activated by
an I
operating time.
To check the status of the device a sampling system is needed. The timing is
chosen at microprocessor level (over half a second is recommended).
sampling of the fault is done
2
C reading. This is to ensure continuous diagnostics throughout the car-radio
1-2mS
1-2mS
Doc ID 12733 Rev 3
1mS
100/200mS
1mS
2
C bus and self activates if an output overload (such
1mS
1mS
Short circuit removed
1mS
1mS
t
(Figure
Short circuit removed
t
26):
(Figure
TDA7563B
Out
25).