MP1720 – 2.7W LOW EMI HIGH EFFICIENCY MONO CLASS-D AUDIO AMPLIFIER
TYPICAL PERFORMANCE CURVES
VIN = PVIN = SHDN =3.3V, DGND = PGND = 0V, CLK = DGND (f
CLK
=1.0MHz), signal frequency
f
s
=1kHz, Gain=12dB, T
A
= +25
C, unless otherwise noted
(6,7,8)
.
20
10
5
2
1
0.5
VIN=2.5V
0.2
0.1
0.05
0.02
0.01
VIN=3.3V
VIN=5V
0.2
0.1
0.05
0.02
VIN=3.3V
VIN=5V
0.2
0.1
0.05
0.02
CLK=GND
(1.0MHz)
CLK=EXT
(500kHz)
20
10
5
2
1
0.5
VIN=2.5V
20
10
5
2
1
0.5
CLK=EXT
(1.4MHz)
CLK=Float
(1.3MHz)
60m 80m100m
200m 300m 500m 700m 1
2
3
4
0.01
60m 80m100m
200m 300m
500m 700m
1
2
0.01
60m 70m 100m
200m 300m
500m 700m
1
2
P
OUT
(W)
P
OUT
(W)
P
OUT
(W)
20
10
5
20
10
5
2
1
0.5
0.2
P
OUT
=800mW
20
10
5
2
P
OUT
=400mW
THD+N (%)
2
1
0.5
0.2
0.1
0.05
0.02
0.01
20
P
OUT
=100mW
1
0.5
0.2
CLK=Float
(1.3MHz)
CLK=GND
(1.0MHz)
CLK=EXT
(500kHz)
CLK=EXT
(1.4MHz)
0.1
0 . 05
0 . 02
0 . 01
0 . 005
0 . 002
0 . 001
P
OUT
=50mW
0.1
0.05
0.02
50 100 200
500 1k
2k
5k 10k 20k
20
50 100 200
500 1k
2k
5k 10k 20k
0.01
20
50 100 200
500 1k
2k
5k 10k 20k
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
Frequency Response
VIN=3.3V, P
OUT
=100mW
+0
+0
-10
-20
-30
-40
-50
+4
+2
+0
-2
-4
-6
-8
120
20
40
60
80
100
-60
50 100 200 500 1k 2k
5k 10k 20k 40k
-10
10 20
2k
4k
6k
8k 10k 12k 14k 16k 18k 20k
-70
20
50 100 200
500 1k
2k
5k 10k 20k
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
MP1720 Rev. 1.01
8/9/2012
www.MonolithicPower.com
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© 2012 MPS. All Rights Reserved.
7
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