TDA7563PD ,MULTIFUNCTION QUAD POWER AMPLIFIER WITH BUILT-IN DIAGNOSTICS FEATURESFEATURESFigure 1. Package■ MULTIPOWER BCD TECHNOLOGY■ MOSFET OUTPUT POWER STAGE■ DMOS POWER OUTPUT■ ..
TDA7563PDTR ,MULTIFUNCTION QUAD POWER AMPLIFIER WITH BUILT-IN DIAGNOSTICS FEATURESElectrical Characteristics (Refer to the test circuit, V = 14.4V; R = 4Ω ; f = 1KHz; G = 30dB; T = ..
TDA7564 ,MULTIFUNCTION QUAD POWER AMPLIFIER WITH BUILT-IN DIAGNOSTICS FEATURESELECTRICAL CHARACTERISTICS (Refer to the test circuit, V = 14.4V; R = 4Ω; f = 1KHz; T = 25°C; unles ..
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TDA7563PD-TDA7563PDTR
MULTIFUNCTION QUAD POWER AMPLIFIER WITH BUILT-IN DIAGNOSTICS FEATURES
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TDA7563PDApril 2004
FEATURES MULTIPOWER BCD TECHNOLOGY MOSFET OUTPUT POWER STAGE DMOS POWER OUTPUT NON-SWITCHING HI-EFFICIENCY HIGH OUTPUT POWER CAPABILITY 4x28W/
4Ω @ 14.4V, 1KHZ, 10% THD, 4x40W EIAJ MAX. OUTPUT POWER 4x72W/2Ω FULL I2 C BUS DRIVING:
–ST-BY INDEPENDENT FRONT/REAR SOFT PLAY/
MUTE SELECTABLE GAIN 30dB 16dB (FOR LOW NOISE LINE OUTPUT
FUNCTION) HIGH EFFICIENCY ENABLE/DISABLE2 C BUS DIGITAL DIAGNOSTICS FULL FAULT PROTECTION DC OFFSET DETECTION FOUR INDEPENDENT SHORT CIRCUIT
PROTECTION CLIPPING DETECTOR PIN WITH
SELECTABLE THRESHOLD (2%/10%) ST-BY/MUTE PIN LINEAR THERMAL SHUTDOWN ESD PROTECTION
DESCRIPTIONThe TDA7563PD is a new BCD technology Quad
Bridge type of car radio amplifier in PowerSO36
package specially intended for car radio applica-
tions. Thanks to the DMOS output stage the
TDA7563PD has a very low distortion allowing a
clear powerful sound. Among the features, its su-
perior efficiency performance coming from the in-
ternal exclusive structure, makes it the most
suitable device to simplify the thermal manage-
ment in high power sets.The dissipated output
power under average listening condition is in fact
reduced up to 50% when compared to the level
provided by conventional class AB solutions. This
device is equipped with a full diagnostics array that
communicates the status of each speaker through
the I2 C bus.
PRODUCT PREVIEWMULTIFUNCTION QUAD POWER AMPLIFIER
WITH BUILT-IN DIAGNOSTICS FEATURES
Figure 2. Block DiagramREV. 1
TDA7563PD
Table 2. Absolute Maximum Ratings
Table 3. Thermal Data
Figure 3. Pin Connection (Top view)
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TDA7563PD
Figure 4. Application Circuit
TDA7563PD
Table 4. Electrical Characteristics (Refer to the test circuit, VS = 14.4V; RL = 4Ω; f = 1KHz; GV = 30dB; Tamb = 25°C; unless otherwise specified.)
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TDA7563PD
Table 4. Electrical Characteristics (continued)(Refer to the test circuit, VS = 14.4V; RL = 4Ω; f = 1KHz; GV = 30dB; Tamb = 25°C; unless otherwise specified.)
TDA7563PD
Figure 5. Quiescent Current vs. Supply Voltage
Figure 6. Output Power vs. Supply Voltage (4Ω)
Figure 7. Output Power vs. Supply Voltage (2Ω)
Figure 8. Distortion vs. Output Power (4Ω, STD)
Figure 9. Distortion vs. Output Power (4Ω, HI-EFF)
Figure 10. Distortion vs. Output Power (2Ω, STD)
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TDA7563PD
Figure 11. Distortion vs. Frequency (4Ω)
Figure 12. Distortion vs. Frequency (2Ω)
Figure 13. Crosstalk vs. Frequency
Figure 14. Supply Voltage Rejection vs. Freq.
Figure 15. Power Dissipation & Efficiency vs.
Output Power (4Ω, STD, SINE)
Figure 16. Power Dissipation & Efficiency vs.
Output Power (4W, HI-EFF, SINE)
TDA7563PD
Figure 17. Power Dissipation vs. Average
Ouput Power (Audio Program
Simulation, 4Ω)
Figure 18. Power Dissipation vs. Average
Ouput Power (Audio Program
Simulation, 2Ω) Diagnostics Functional Description:
a) TURN-ON DIAGNOSTICIt is activated at the turn-on (stand-by out) under I2 Cbus request. Detectable output faults are: SHORT TO GND SHORT TO Vs SHORT ACROSS THE SPEAKER OPEN SPEAKER
To verify if any of the above misconnections are in place, a subsonic (inaudible) current pulse (fig. 19) is inter-
nally generated, sent through the speaker(s) and sunk back.The Turn On diagnostic status is internally stored
until a successive diagnostic pulse is requested (after a I2C reading).
If the "stand-by out" and "diag. enable" commands are both given through a single programming step, the pulse
takes place first (power stage still in stand-by mode, low, outputs= high impedance).
Afterwards, when the Amplifier is biased, the PERMANENT diagnostic takes place. The previous Turn On state
is kept until a short appears at the outputs.
Figure 19. Turn - On diagnostic: working principle
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TDA7563PDFig. 20 and 21 show SVR and OUTPUT waveforms at the turn-on (stand-by out) with and without TURN-ON
DIAGNOSTIC.
Figure 20. SVR and Output behaviour (CASE 1: without turn-on diagnostic)
Figure 21. SVR and Output pin behaviour (CASE 2: with turn-on diagnostic)
TDA7563PD The information related to the outputs status is read and memorized at the end of the current pulse top. The
acquisition time is 100 ms (typ.). No audible noise is generated in the process. As for SHORT TO GND / Vs the
fault-detection thresholds remain unchanged from 30 dB to 16 dB gain setting. They are as follows:
Figure 22. Concerning SHORT ACROSS THE SPEAKER / OPEN SPEAKER, the threshold varies from 30 dB to 16 dB
gain setting, since different loads are expected (either normal speaker's impedance or high impedance). The
values in case of 30 dB gain are as follows:
Figure 23. If the Line-Driver mode (Gv= 16 dB and Line Driver Mode diagnostic = 1) is selected, the same thresholds will
change as follows:
Figure 24.
b) PERMANENT DIAGNOSTICS. Detectable conventional faults are: SHORT TO GND SHORT TO Vs SHORT ACROSS THE SPEAKER
The following additional features are provided: OUTPUT OFFSET DETECTION
The TDA7563PD has 2 operating statuses: 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 (fig. 25). Restart takes place when the overload is removed.
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TDA7563PD DIAGNOSTIC mode. It is enabled via I2 C bus and self activates if an output overload (such to cause
the intervention of the short-circuit protection) occurs to the speakers outputs . Once activated, the di-
agnostics procedure develops as follows (fig. 26): To avoid momentary re-circulation spikes from giving erroneous diagnostics, a check of the output sta-
tus 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 I2 C reading. This is to ensure continuous diagnostics
throughout the car-radio 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).
Figure 25. Restart timing without Diagnostic Enable (Permanent) - Each 1mS time, a sampling of
the fault is done
Figure 26. Restart timing with Diagnostic Enable (Permanent) OUTPUT DC OFFSET DETECTIONAny DC output offset exceeding ±2 V are signalled out. This inconvenient might occur as a consequence of ini-
tially 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):
