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TPA3118D2DAP Datasheet(PDF) 18 Page - Texas Instruments |
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TPA3118D2DAP Datasheet(HTML) 18 Page - Texas Instruments |
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18 / 45 page  Copyright © 2016, Texas Instruments Incorporated > 1.4sec mP TPA3116D2 SDZ MUTE FAULTZ SDZ MUTE FAULTZ 18 TPA3116D2, TPA3118D2, TPA3130D2 SLOS708G – APRIL 2012 – REVISED DECEMBER 2017 www.ti.com Product Folder Links: TPA3116D2 TPA3118D2 TPA3130D2 Submit Documentation Feedback Copyright © 2012–2017, Texas Instruments Incorporated Figure 30. MUTE Driven by Inverted FAULTZ Figure 31. Timing Requirement for SDZ 7.3.11 Thermal Protection Thermal protection on the TPA31xxD2 family prevents damage to the device when the internal die temperature exceeds 150°C. There is a ±15°C tolerance on this trip point from device to device. Once the die temperature exceeds the thermal trip point, the device enters into the shutdown state and the outputs are disabled. This is a latched fault. Thermal protection faults are reported on the FAULTZ terminal as a low state. If automatic recovery from the thermal protection latch is desired, connect the FAULTZ pin directly to the SDZ pin. This allows the FAULTZ pin function to automatically drive the SDZ pin low which clears the thermal protection latch. 7.3.12 Device Modulation Scheme The TPA31xxD2 family has the option of running in either BD modulation or 1SPW modulation; this is set by the MODSEL pin. 7.3.12.1 MODSEL = GND: BD-Modulation This is a modulation scheme that allows operation without the classic LC reconstruction filter when the amp is driving an inductive load with short speaker wires. Each output is switching from 0 volts to the supply voltage. The OUTPx and OUTNx are in phase with each other with no input so that there is little or no current in the speaker. The duty cycle of OUTPx is greater than 50% and OUTNx is less than 50% for positive output voltages. The duty cycle of OUTPx is less than 50% and OUTNx is greater than 50% for negative output voltages. The voltage across the load sits at 0V throughout most of the switching period, reducing the switching current, which reduces any I2R losses in the load. |
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