TDA7563 STMicroelectronics, TDA7563 Datasheet - Page 8

• 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

TDA7563
Figure 14. Power Dissipation vs. Average
DIAGNOSTICS FUNCTIONAL DESCRIPTION:
a) TURN-ON DIAGNOSTIC
It is activated at the turn-on (stand-by out) under I
– 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. 16) 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 16. Turn - On diagnostic: working principle
8/20
45
40
35
30
25
20
15
10
5
0
0
Ptot (W)
Vs = 14 V
RL = 4 x 4 Ohm
GAUSSIAN NOISE
Ouput Power (Audio Program
Simulation, 4 )
1
Isource
Isink
2
Po (W)
Vs~5V
CH+
CH-
START
3
CLIP
HI-EFF MODE
STD MODE
4
Isource
I (mA)
Isink
2
5
Cbus request. Detectable output faults are:
Figure 15. Power Dissipation vs. Average
90
80
70
60
50
40
30
20
10
0
0
Ptot (W)
Vs = 14 V
RL = 4 x 2 Ohm
GAUSSIAN NOISE
1
Measure time
~100mS
Ouput Power (Audio Program
Simulation, 2 )
2
3
Po (W)
4
START
CLIP
5
6
HI-EFF MODE
STD MODE
t (ms)
7
8
9