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TPA3112D1QPWPRQ1 Datasheet(PDF) 15 Page - Texas Instruments |
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TPA3112D1QPWPRQ1 Datasheet(HTML) 15 Page - Texas Instruments |
15 / 32 page PVCC PVCC GAIN1 6 AVCC 7 8 AGND 9 GVDD OUTN BSN BSP OUTP 23 22 21 20 TPA3112D1-Q1 FAULT 2 GND 3 4 GND 5 GAIN0 PVCC BSN OUTN PGND 27 26 25 24 PLIMIT 10 INN 11 12 INP 13 NC PGND OUTP BSP PVCC 19 18 17 16 AVCC 14 PVCC 15 GND 29 PowerPAD SD 1 PVCC 28 PVCC 100 F 0.1 F 1000 pF 100 F 0.1 F 1000 pF Audio Source Control System AVCC 100 k Ω 10 100 k (1) Ω AVCC 1 k Ω FB FB 0.47 F 1000 pF 0.47 F 1000 pF 1 µF 1 µF 1 µF 1 µF TPA3112D1-Q1 www.ti.com SLOS793B – SEPTEMBER 2012 – REVISED SEPTEMBER 2015 8 Application and Implementation NOTE Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality. 8.1 Application Information The TPA3112D1-Q1 device is an automotive class-D audio amplifier. It accepts either a single ended or differential analog input, amplifies the signal, and drives up to 25-W across a bridge tied load, usually a speaker. Because an analog input is needed, this device is often paired with a codec or audio DAC if the audio source is digital. The four digital input/output pins, GAIN0, GAIN1, SD, and FAULT, can be pulled up to PVCC. When connecting these terminals to PVCC, a 100 k Ω-resistor must be put in series to limit the slew rate. One of four gain settings is used depending on the configuration of GAIN0 and GAIN1. The SD pin is used to put the device in shutdown or normal mode. The FAULT pin is used to indicate if a DC detect or short circuit fault was detected. The next few sections explains design considerations and how to choose the external components. 8.2 Typical Application (1) 100 k Ω resistor is needed if the PVCC slew rate is more than 10 V/ms. Figure 16. Mono Class-D Amplifier With BTL Output Copyright © 2012–2015, Texas Instruments Incorporated Submit Documentation Feedback 15 Product Folder Links: TPA3112D1-Q1 |
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