Shorted Load (SL)

Detection Threshold

Normal

Load

Open Load (OL)

Detection Threshold

Open Load

Play Mode

Normal or Shorted Load

May Be Detected

Shorted Load

Detected

Open Load Detected

Normal or Open Load

May Be Detected

Shorted

Load

OL Max

Load Diagnostics

Output Conditions

OL Min

SL Max

SL Min

13

TAS5441-Q1

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SLOSE41 – APRIL 2020

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Figure 12. Load Diagnostic Reporting Thresholds

7.3.5.2 Faults During Load Diagnostics

If the device detects a fault (such as overtemperature, overvoltage, or undervoltage) during the load diagnostics

test, the device exits the load diagnostics, which can result in a pop or click on the output.

7.3.6 Protection and Monitoring

•

Overcurrent Shutdown (OCSD)—The overcurrent shutdown forces the output into Hi-Z. The device asserts

•

DC Detect—This circuit checks for a dc offset continuously during normal operation at the output of the

dc detection threshold follows PVDD changes.

•

Overtemperature Shutdown (OTSD)—The device shuts down when the die junction temperature reaches

is automatic when the temperature returns to a safe level.

•

Undervoltage (UV)—The undervoltage (UV) protection detects low voltages on PVDD. In the event of an

•

Power-On Reset (POR)—Power-on reset (POR) occurs when PVDD drops below the POR threshold. A POR

•

Overvoltage (OV) and Load Dump—OV protection detects high voltages on PVDD. If PVDD reaches the

withstand 40-V load-dump voltage spikes. The device supports load-dump in both standby and active modes.

•

This value determines both the positive and negative limits. The user can use the SpeakerGuard feature to

improve battery life or protect the speaker from exceeding its excursion limits.

•

Adjacent-Pin Shorts—The device design is such that shorts between adjacent pins do not cause damage.

interface is active approximately 1 ms after the STANDBY pin is high.