43 PWM-P-2 DO Power amplifier right channel PWM output (positive end)
44 PWM-M-3 DO Power amplifier surround left channel PWM output (negative end)
45 PWM-P-3 DO Power amplifier surround left channel PWM output (positive end)
46 PWM-M-4 DO Power amplifier surround right channel PWM output (negative end)
47 PWM-P-4 DO Power amplifier surround right channel PWM output (positive end)
48 VR-PWM Reference voltage of digital bandwidth modulation 1.8V
49 PWM-M-7 DO Power amplifier centre PWM output (negative end)
50 PWM-P-7 DO Power amplifier centre PWM output (positive end)
51 PWM-M-8 DO Power amplifier subwoofer PWM output (negative end)
52 PWM-P-8 DO Power amplifier subwoofer PWM output (positive end)
53 DVSS-PWM Bandwidth modulation digital ground
54 DVDD-PWM Bandwidth modulation digital 3.3V power supply
55 PWM-M-5 DO Mixed left channel PWM output (negative end)
56 PWM-P-5 DO Mixed left channel PWM output (positive end)
57 PWM-M-6 DO Mixed right channel PWM output (negative end)
58 PWM-P-6 DO Mixed right channel PWM output (positive end)
59 PWM-HPML DO PWM output (negative end)
60 PWM-HPPL DO PWM output (positive end)
61 PWM-HPMR DO PWM output (negative end)
62 PWM-HPPR DO PWM output (positive end)
63 MCLK DI
64 RESERVED
3.5.13 Function introduction to TAS5112
TAS5112 is a high performance digital amplifier designed by TI Company. In model DK1020S, two
TAS5112 are used to demodulate and amplify digital audio signal after pulse width demodulation and
outputted by TAS5508. Each generates 3-channel outputs, that is surround left/right channel, subwoofer
channel and front left/right/centre channel. TAS5112 is usually used together with TAS5508. If TSA5508 has
trouble, it will provide a feedback signal for TAS5508 to make TAS5508 close and not output signal any more
to avoid damaging element.
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