TDA7575PDTR STMicroelectronics, TDA7575PDTR Datasheet - Page 17

• Manufacturer Part Number: TDA7575PDTR
• Description: IC AMP AUDIO PWR 150W POWERSO37
• Manufacturer: STMicroelectronics
• Type: Class ABr

Specifications of TDA7575PDTR

• Output Type: 1-Channel (Mono) or 2-Channel (Stereo)
• Max Output Power X Channels @ Load: 150W x 1 @ 1 Ohm; 75W x 2 @ 2 Ohm
• Voltage - Supply: 8 V ~ 18 V
• Features: Differential Inputs, I²C, Mute, Short-Circuit and Thermal Protection, Standby
• Mounting Type: Surface Mount
• Package / Case: PowerSO-36 Exposed Top Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-3990-2

DOCUMENT CD00003142
Copyright STMicroelectronics
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 26 dB to 12 dB gain setting. They are as follows:
Concerning SHORT ACROSS THE SPEAKER / OPEN SPEAKER, the threshold varies from 26 dB to 12 dB
gain setting, since different loads are expected (either normal speaker's impedance or high impedance). The
values in case of 26 dB gain are as follows:
If the Line-Driver mode (Gv= 12 dB and Line Driver Mode diagnostic = 1) is selected, the same thresholds will
change as follows:
b) PERMANENT DIAGNOSTICS.
Detectable conventional faults are:
The following additional features are provided:
The TDA7575PD has 2 operating statuses:
1) RESTART mode. The diagnostic is not enabled. Each audio channel operates independently from each oth-
er. 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. G). Restart takes place when the overload is removed.
2) DIAGNOSTIC mode. It is enabled via I
tervention of the short-circuit protection) occurs to the speakers outputs . Once activated, the diagnostics pro-
cedure develops as follows (fig. H):
– 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
– Instead, if an overload is detected during the check after 1 ms, then a diagnostic cycle having a du-
– After a diagnostic cycle, the audio channel interested by the fault is switched to RESTART mode. The
status is made after 1ms: if normal situation (no overloads) is detected, the diagnostic is not per-
formed and the channel returns back active.
ration of about 100 ms is started.
REVISION 3.0
0V
0Ω
0V
S.C. across Load
S.C. across Load
S.C. to GND
0.5Ω
1.5Ω
1.2V
x
x
2
x
C bus and self activates if an output overload (such to cause the in-
1.5Ω
4.5Ω
1.8V
Normal Operation
Normal Operation
Normal Operation
COMPANY INTERNAL
ACTIVE
V
70Ω
S
200Ω
-1.5V
x
x
x
400Ω
V
130Ω
S
-0.9V
Open Load
Open Load
S.C. to Vs
D01AU1254
D01AU1252
D02AU1341
Unauthorized reproduction and communication strictly prohibited
DATE 22-Mar-2004
Infinite
infinite
V
S
TDA7575PD
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