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 (fCLK=1.0MHz), signal frequency
fs=1kHz, Gain=12dB, TA = +25C, unless otherwise noted (6,7,8)
.
20
10
20
10
20
10
5
5
5
2
1
2
1
2
1
VIN=2.5V
0.5
0.5
0.5
CLK=Float
(1.3MHz)
CLK=EXT
(1.4MHz)
VIN=2.5V
0.2
0.1
0.2
0.1
0.2
0.1
VIN=5V
VIN=5V
0.05
0.05
0.05
VIN=3.3V
CLK=EXT
CLK=GND
(1.0MHz)
VIN=3.3V
(500kHz)
0.02
0.01
0.02
0.01
0.02
0.01
60m 80m100m
200m 300m 500m 700m
1
2
3
4
60m 80m100m
200m
300m
500m 700m
1
2
60m 70m 100m
200m 300m
500m 700m
1
2
POUT (W)
POUT (W)
POUT (W)
20
10
20
10
20
10
5
5
5
2
1
2
1
2
1
0.5
POUT=400mW
0.2
0.1
0.5
0.5
POUT=800mW
CLK=Float
(1.3MHz)
0.05
0.2
0.1
0.2
0.1
CLK=GND
(1.0MHz)
0.02
0.01
POUT=50mW
0.05
0.05
CLK=EXT
(500kHz)
CLK=EXT
(1.4MHz)
0.005
0.02
0.01
0.02
0.01
0.002
0.001
POUT=100mW
20
50 100 200 500 1k 2k
5k 10k 20k
20
50 100 200 500 1k 2k
5k 10k 20k
20
50 100 200 500 1k 2k
5k 10k 20k
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
Frequency Response
VIN=3.3V, POUT=100mW
+0
20
40
+0
-10
-20
+4
+2
+0
-2
-4
-6
-8
-30
-40
-50
-60
60
80
100
120
-10
10 20
-70
5k
10k 20k 40k
50 100 200 500 1k 2k
2k 4k 6k 8k 10k 12k 14k 16k 18k 20k
20
50 100 200 500 1k 2k
5k 10k 20k
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
MP1720 Rev. 1.01
8/9/2012
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7
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