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TPA2012D2RTJRG4 Datasheet(PDF) 18 Page - Texas Instruments |
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TPA2012D2RTJRG4 Datasheet(HTML) 18 Page - Texas Instruments |
18 / 33 page PVdd AVdd INL- INL+ INR- INR+ SDR AGND PGND OUTL+ OUTL- OUTR+ OUTR- Shutdown Control TPA2012D2 To power supply 10 µF CI DAC or CODEC SDL G1 G0 CI CI CI 0.1 µF 1 µF Copyright © 2016, Texas Instruments Incorporated 1 µF 1 µF 1 µF I I C 1 C (2 R f ) = p C I I 1 f (2 R C ) = p 18 TPA2012D2 SLOS438F – DECEMBER 2004 – REVISED MARCH 2017 www.ti.com Product Folder Links: TPA2012D2 Submit Documentation Feedback Copyright © 2004–2017, Texas Instruments Incorporated The input capacitors and input resistors form a high-pass filter with the corner frequency, fc, determined in Equation 1. (1) The value of the input capacitor is important to consider as it directly affects the bass (low frequency) performance of the circuit. Speakers in wireless phones cannot usually respond well to low frequencies, so the corner frequency can be set to block low frequencies in this application. Not using input capacitors can increase output offset. Equation 2 is used to solve for the input coupling capacitance. (2) If the corner frequency is within the audio band, the capacitors should have a tolerance of ±10% or better, because any mismatch in capacitance causes an impedance mismatch at the corner frequency and below. 10.2.1.3 Application Curves For application curves, see the figures listed in Table 4. (1) All figure numbers have a hyperlink to a figure in the Typical Characteristics. Table 4. Table of Graphs DESCRIPTION FIGURE NO.(1) THD+N vs Output power Figure 1 THD+N vs Frequency Figure 5 Power dissipation vs Output power Figure 24 Output power vs Supply voltage Figure 32 10.2.2 TPA2012D2 With Single-Ended Input Signal Figure 38. Typical Application Schematic With Single-Ended Input Signal |
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