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This chapter describes the short-circuit protection and fault-reporting circuitry of the
TAS5142 device.
3.1
Short-Circuit Protection and Fault-Reporting Circuitry
The TAS5142 is a self-protecting device that provides device fault reporting (including high-temperature
protection and short-circuit protection). The TAS5186A is configured in back-end auto-recovery mode and,
therefore, resets automatically after all errors. This means that the device restarts itself after an error
occasion and report through the SD signal.
3.2
Device Fault Reporting
The OTW and SD outputs from TAS5186A indicate fault conditions. Please refer to the TAS5186A Data
Manual for a description of these pins.
OTW
0
0
1
1
The temperature warning signal is an open collector connected to pin 22 (OTW) in the control interface
connector.
The shutdown signal is an open collector connected to pin 20 (SD) in the control interface connector.
The shutdown signals, together with the temperature warning signal, give chip state information as
described in
Table
SLEU073 – JULY 2006
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Table 3-1. TAS5142 Warning/Error Signal Decoding
SD
DEVICE CONDITION
0
High-temperature error and/or high-current error
1
High-temperature warning
0
Undervoltage lockout or high-current error
1
Normal operation, no errors/warnings
3-1. Device fault-reporting outputs are open-drain outputs.
Chapter 3
SLEU073 – JULY 2006
Protection
Protection
11
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