TDA7575PD STMicroelectronics, TDA7575PD Datasheet - Page 18

• Manufacturer Part Number: TDA7575PD
• Description: IC AMP AUDIO PWR 150W POWERSO36
• Manufacturer: STMicroelectronics
• Type: Class ABr

Specifications of TDA7575PD

• 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

DOCUMENT CD00003142
Copyright STMicroelectronics
TDA7575PD
Fig. G: Restart timing without Diagnostic Enable (Permanent)
Each 1mS time, a sampling of the fault is done
Fig H: 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):
Excess offset is signalled out if persistent throughout the assigned testing time. This feature is disabled if any
overloads leading to activation of the short-circuit protection occurs in the process.
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circuit protection intervention
– To check the status of the device a sampling system is needed. The timing is chosen at microproces-
– START = Last reading operation or setting IB1 - D5 - (OFFSET enable) to 1
– STOP = Actual reading operation
circuit protection intervention
(i.e. short circuit to GND)
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.
sor level (over than half a second is recommended).
Overcurrent and short
(i.e. short circuit to GND)
Overcurrent and short
REVISION 3.0
1-2mS
1mS
1mS
100mS
1mS
COMPANY INTERNAL
ACTIVE
1mS
2
C reading. This is to ensure continuous diagnostics
1mS
Short circuit removed
1mS
Unauthorized reproduction and communication strictly prohibited
1mS
t
DATE 22-Mar-2004
Short circuit removed
t
Out
page: 14/17