Digital Amplifier User's Guide
4.4 SPDIF Optical Input Connector
4.5 SPDIF Co-Axial Input Connector
4.6 USB Connector
5 Protection
5.1 Short-Circuit Protection and Fault-Reporting Circuitry
5.2 Fault Reporting
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Protection
This connector is a standard TOSLINK connector that connects the SPDIF digital audio input to the SPDIF
receiver on the HPL-MC012 PCB. This connector, or the SPDIF co-axial input, is used, but not both
connectors at the same time.
This connector is a standard RCA connector that connects the SPDIF digital audio input to the SPDIF
receiver on the HPL-MC012 PCB. This connector, or the SPDIF optical Input, is used, but not both
connectors at the same time.
This connector is a standard USB connector and is used to connect GUI control information from a PC to
the HPL-MC012 PCB. The USB system does not stream audio from a PC.
This section describes the short-circuit protection and fault-reporting circuitry of the TAS5102/3 device.
The TAS5102/3 is a self-protecting device that provides fault reporting (including high-temperature
protection and short-circuit protection). For highest possible reliability, recovering from a fault requires
external reset of the device. This is done by the TAS5086 on the HPL-MC012 board. See the TAS5102/3
data sheet for more information regarding the RESET function.
The OTW and FAULT outputs from TAS5102/3 indicate fault conditions. See the TAS5102/3 data sheet
(SLLS801 ) for a description of these pins.
Table 6. TAS5102 Warning/Error Signal Decoding
FAULT OTW Device Condition
Overcurrent (OC) or undervoltage (UVP) warning or overtemperature error
0 0
(OTE)
Overtemperature warning (OTW) or overcurrent (OC) or undervoltage
0 1
(UVP)
1 0 Junction temperature lower than 125 ° C and no faults (normal operation)
1 1 Junction temperature higher than 125 ° C (overtemperature warning)
The FAULT output is open-drain. The OTW output is push-pull active high.
The OTW LED on the MC012 is illuminated when the temperature of the TAS5102/3 is okay (less than
125 ° C.) The LED turns off when the TAS5102/3 is warning of overtemperature on the device (T
J
> 125 ° C.)
This polarity is due to a reversal of polarity of the OTW pin from other devices (e.g., TAS5132) which also
use this modulator board.
SLLU106 – August 2008 TAS5102EVM and TAS5103EVM for the TAS5102 and TAS5103 Digital Amplifier Power Output Stages 11
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