BBK DK1410SI - 3.5.12 Function introduction to TAS5508

3.5.11 Function introduction to TLV272
TLV272 includes two integrated operational amplifiers inside, with pin function shown as follows:
Pin Name
Data
direction
Function Pin Name
Data
direction
Function
1 1OUT O Output of operational amplifier A 5 2IN+ O Output of operational amplifier B
2 1IN- I
Negative input terminal of operational
amplifier A
6 2IN- I
Negative input terminal of operational
amplifier B
3 1IN+ I
Positive input terminal of operational
amplifier A
7 2OUT I
Positive input terminal of operational
amplifier B
4 GND I Common 8 VDD I 5V voltage input
3.5.12 Function introduction to TAS5508
TAS5508 is a digital pulse width modulator (PWM) developed by TI Company, which performs PWM
modulation to audio digital signal (SDATA0, SDATA1, SDATA2) outputted by Mt1389 to modulates audio
signal onto load wave. This player generates 10-path audio signal output in all, that is headphone left/right
channel, AV board mixed left/right channel, surround left/right channel, front left/right channel, centre channel
and subwoofer channel. The sound volume is bigger, space occupation patio is smaller; and sound volume is
smaller, space occupation ration is bigger. It mat realize self-protection function. If voltage and current of the
back stage circuit is too high, it will close automatically to avoid damaging element. Function of each pin is
shown as follows:
Pin Name Data direction Function
1 VRA-PLL Reference voltage of PLL analog power supply 1.8V
2 PLL AO PLL-FLT-RET.PLL external filtering loop
3 PLL-FLTM AO PLL negative input
4 PLL-FLTP AI PLL positive input
5 AVSS Analog ground
6 AVSS Analog ground
7 VRD-PLL Reference voltage of PLL digital power supply 1.8V
8 AVSS-PLL PLL analog ground
9 AVDD-PLL PLL3.3V power supply
10 VBGAP Bandwidth gap reference voltage
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