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AD82587D Datasheet(PDF) 32 Page - Elite Semiconductor Memory Technology Inc.

Part # AD82587D
Description  2X20W Stereo / 1X40W Mono Digital Audio Amplifier
PDF  45 Pages
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Manufacturer  ESMT [Elite Semiconductor Memory Technology Inc.]
Direct Link  http://www.esmt.com.tw/index.asp
Logo ESMT - Elite Semiconductor Memory Technology Inc.

AD82587D Datasheet(HTML) 32 Page - Elite Semiconductor Memory Technology Inc.

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ESMT
AD82587D
Elite Semiconductor Memory Technology Inc.
Publication Date: Jan. 2018
Revision: 1.6
32/45
 Address 0X09 : Power saving mode switching level
If the PWM exceeds the programmed switching power level (default 30*40ns), the modulation algorithm will
change from quaternary to ternary modulation. Ternary modulation has less switching loss, resulting in
higher power efficiency during larger power output operations. If the PWM drops below the programmed
switching power level, the modulation algorithm will change back to quaternary modulation.
BIT
NAME
DESCRIPTION
VALUE
FUNCTION
B[7:5]
X
Reserved
B[4:0]
QTS[4:0]
Quaternary and
Ternary Switching
Level
11111
62
11110
60
︰
︰
︰
︰
10000
32
01111
30
01110
28
01101
26
︰
︰
00001
4
00000
4
Total Harmonic Distortion + Noise v.s. Output Power
Color
Sweep
Trace
Line Style
Thick
Data
Axis
Comment
1
1
Red
Solid
2
Anlr.THD+N Ratio
Left
Q
2
1
Blue
Solid
3
Anlr.THD+N Ratio
Left
Q+T level 30
3
1
Magenta
Solid
3
Anlr.THD+N Ratio
Left
Q+T level 40
4
1
Green
Solid
3
Anlr.THD+N Ratio
Left
Q+T level 20
5
1
Cyan
Solid
3
Anlr.THD+N Ratio
Left
Q+T level 46
0.04
2
0.06
0.08
0.2
0.3
0.5
0.7
1
%
2
20
3
4
5
6
7
8
9 10
W
24V, 8Ω
Quaternary
Q+T level 20
Q+T level 30
Q+T level 40
Q+T level 46



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