Ic2701 (Vhiyda147Sz-1Y) - Sharp LC-32D44E Service Manual

8. IC2701 (VHiYDA147SZ-1Y)

High-efficiency digital audio power amplifier IC with maximum power output of 20W (Vddp=14V, RL=4Ω) x 2ch.
It incorporates the "DRC (Dynamic range compression)" function. Since the volume is increased at low volume level and is decreased at high volume
level, it is possible to prevent sudden volume change. It is also provided with the "power limiter" which can set the output limit.
Pin No. Pin Name
1, 2, 12, 25, 35, 36
3 PVDDREG
4
5
6
7
8
9
10
11 PLIMIT
13, 14 PVDDPR
15, 16, 17 OUTPR
18, 19 PVSSR
20, 21, 22 OUTMR
23, 24 PVDDMR
26 SLEEPN
27 PROTN
28 MUTEN
29 CKOUT
30
31 NCDRC0
32 NCDRC1
33
34
37, 38 PVDDML
39, 40, 41 OUTML
42, 43 PVSSL
44, 45, 46 OUTPL
47, 48 PVDDPL
I/O
NC --- No connection.
--- Power terminal for regulator (PVDD).
AVDD --- Output terminal for 3.3V regulator.
INLP I Analog input terminal (Lch+)
INLM I Analog input terminal (Lch-)
VREF VREF terminal.
INRM I Analog input terminal (Rch-)
INRP I Analog input terminal (Rch+)
AVSS --- GND terminal for analog.
I Power limit setting terminal.
--- Power terminal for digital amplifier output (Rch+).
O Digital amplifier output terminal (Rch+).
--- Ground terminal for digital amplifier output (Rch).
O Digital amplifier output terminal (Rch-).
--- Power terminal for digital amplifier output (Rch-).
I Sleep control terminal.
O Error flag output terminal.
I Mute control terminal.
O Clock output terminal for synchronization.
CKIN I External clock input terminal.
I Non-clip/DRC1/DRC2 mode selection terminal 0.
I Non-clip/DRC1/DRC2 mode selection terminal 1.
GAIN0 I GAIN setting terminal 0.
GAIN1 I GAIN setting terminal 1.
--- Power terminal for digital amplifier output (Lch-).
O Digital amplifier output terminal (Lch-).
--- Ground terminal for digital amplifier output (Lch).
O Digital amplifier output terminal (Lch+).
--- Power terminal for digital amplifier output (Lch+).
LC32D44E/S/RU-BK/GY (1st Eddition)
Pin Function
5 – 8