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TPA3116D2 데이터시트(PDF) 10 Page - Texas Instruments |
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TPA3116D2 데이터시트(HTML) 10 Page - Texas Instruments |
10 / 36 page + – + – + – + + SD MUTE TTL Buffer Gain Control GAIN OUTPR_FB RINP RINN Gain Control OUTPNR_FB FAULT SYNC GAIN/SLV AM<2:0> PLIMIT AVCC GVDD LDO Regulator LINP LINN GND Input Sense PBTL Select OUTPL_FB Gain Control OUTNL_FB AVDD GVDD PLIMIT Reference Ramp Generator Biases and References Startup Protection Logic SC Detect DC Detect Thermal Detect UVLO/OVLO PVCC GVDD PVCC Gate Drive OUTNL_ FB PVCC GVDD PVCC Gate Drive PWM Logic Modulation and PBTL Select OUTPL_FB GND OUTPL BSPL GND OUTNL BSNL GND BSNR OUTPR GND OUTNR OUTNR_ FB BSPR OUTPR_FB PVCC GVDD PVCC Gate Drive PVCC GVDD PVCC Gate Drive PWM Logic Modulation and PBTL Select PLIMIT PLIMIT + – + – + – + – + – + – – – Thermal Pad + – PVCC PVCC TPA3116D2-Q1, TPA3118D2-Q1 SLOS862A – JULY 2015 – REVISED AUGUST 2015 www.ti.com 7 Detailed Description 7.1 Overview The TPA311xD2-Q1 devices are highly efficient class-D audio amplifiers with integrated 120-m Ω MOSFETs that allow output currents up to 7.5 A. The high efficiency allows the amplifier to provide an excellent audio performance without the need for a bulky heat sink. The device can be configured for either master or slave operation by using the SYNC pin. Doing so helps to prevent audible beat noise. 7.2 Functional Block Diagram 7.3 Feature Description 7.3.1 Gain Setting and Master and Slave The gain of the TPA311xD2-Q1 family is set by the voltage divider connected to the GAIN/SLV control pin. Master or slave mode is also controlled by the same pin. An internal ADC is used to detect the eight input states. The first four stages set the GAIN in master mode to gains of 20, 26, 32, and 36 dB, respectively, whereas the next four stages set the GAIN in slave mode to gains of 20, 26, 32, and 36 dB, respectively. The gain setting is latched during power up and cannot be changed while device is powered. Table 2 lists the recommended resistor values and the state and gain. 10 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: TPA3116D2-Q1 TPA3118D2-Q1 |
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