TDA7563 STMicroelectronics, TDA7563 Datasheet - Page 11

• Manufacturer Part Number: TDA7563
• Description: IC AMP AUDIO 72W AB 27FLEXIWATT
• Manufacturer: STMicroelectronics
• Type: Class ABr

Specifications of TDA7563

• Output Type: 4-Channel (Quad)
• Max Output Power X Channels @ Load: 72W 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: Contains lead / RoHS non-compliant
• Other names: 497-2183-5

– To avoid momentary re-circulation spikes from giving erroneous diagnostics, a check of the output sta-
– Instead, if an overload is detected during the check after 1 ms, then a diagnostic cycle having a duration
– After a diagnostic cycle, the audio channel interested by the fault is switched to RESTART mode. The
– To check the status of the device a sampling system is needed. The timing is chosen at microprocessor
Figure 19. Restart timing without Diagnostic Enable (Permanent) - Each 1mS time, a sampling of
Figure 20. Restart timing with Diagnostic Enable (Permanent)
OUTPUT DC OFFSET DETECTION
Any DC output offset exceeding +/- 2 V are signalled out. This inconvenient might occur as a consequence of
initially defective or aged and worn-out input capacitors feeding a DC component to the inputs, so putting the
speakers at risk of overheating.
This diagnostic has to be performed with low-level output AC signal (or Vin = 0).
The test is run with selectable time duration by microprocessor (from a "start" to a "stop" command):
– START = Last reading operation or setting IB1 - D5 - (OFFSET enable) to 1
circuit protection intervention
circuit protection intervention
tus is made after 1ms: if normal situation (no overloads) is detected, the diagnostic is not performed and
the channel returns back active.
of about 100 ms is started.
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
throughout the car-radio operating time.
level (over half a second is recommended).
(i.e. short circuit to GND)
(i.e. short circuit to GND)
Overcurrent and short
Overcurrent and short
the fault is done
1-2mS
1-2mS
1mS
100/200mS
1mS
2
C reading. This is to ensure continuous diagnostics
1mS
1mS
Short circuit removed
1mS
1mS
t
Short circuit removed
t
TDA7563
Out
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