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TAS5441-Q1 Folha de dados(PDF) 13 Page - Texas Instruments |
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TAS5441-Q1 Folha de dados(HTML) 13 Page - Texas Instruments |
13 / 28 page 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 www.ti.com SLOSE41 – APRIL 2020 Product Folder Links: TAS5441-Q1 Submit Documentation Feedback Copyright © 2020, Texas Instruments Incorporated 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 the FAULT pin and updates the I2C register. • DC Detect—This circuit checks for a dc offset continuously during normal operation at the output of the amplifier. If a dc offset occurs, the device asserts the FAULT pin and updates the I2C register. Note that the dc detection threshold follows PVDD changes. • Overtemperature Shutdown (OTSD)—The device shuts down when the die junction temperature reaches the overtemperature threshold. The device asserts the FAULT pin asserts and updates I2C register. Recovery 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 undervoltage condition, the device asserts the FAULT pin and resets the I2C register. • Power-On Reset (POR)—Power-on reset (POR) occurs when PVDD drops below the POR threshold. A POR event causes the I2C bus to go into a high-impedance state. After recovery from the POR event, the device restarts automatically with default I2C register settings. The I2C is active as long as the device is not in POR. • Overvoltage (OV) and Load Dump—OV protection detects high voltages on PVDD. If PVDD reaches the overvoltage threshold, the device asserts the FAULT pin and updates the I2C register. The device can withstand 40-V load-dump voltage spikes. The device supports load-dump in both standby and active modes. • SpeakerGuard—This protection circuitry limits the output voltage to the value selected in I2C register 0x03. 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. 7.3.7 I2C Serial Communication Bus The device communicates with the system processor via the I2C serial communication bus as an I2C slave-only device. The processor can poll the device via I2C to determine the operating status. All reports of fault conditions and detections are via I2C. The system can also set numerous features and operating conditions via I2C. The I2C interface is active approximately 1 ms after the STANDBY pin is high. |
Nº de peça semelhante - TAS5441-Q1 |
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Descrição semelhante - TAS5441-Q1 |
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