Datasheet
0
0 200 400 600 800 1000 1200
OUTPUT POWER (mW)
POWER DISSIPATION (%)
100
200
300
400
500
600
V
DD
= 5V
V
DD
= 3.6V
V
DD
= 2.5V
0
0 250 500 750 1000 1250 1500
OUTPUT POWER (mW)
POWER DISSIPATION (mW)
V
DD
= 2.5V
V
DD
= 3.6V
V
DD
= 5V
20
40
60
80
100
120
140
160
180
200
0
10
20
30
40
50
60
70
80
90
100
0 500 1000 1500 2000 2500
OUTPUT POWER (mW)
EFFICIENCY (%)
V
DD
= 5V
V
DD
= 3.6V
V
DD
= 2.5V
0 250 500 750 1000 1250 1500
OUTPUT POWER (mW)
EFFICIENCY (%)
0
10
20
30
40
50
60
70
80
90
100
V
DD
= 5V
V
DD
= 3.6V
V
DD
= 2.5V
LM4673, LM4673SDBD, LM4673TMBD
SNAS317D –DECEMBER 2005–REVISED MAY 2013
www.ti.com
Typical Performance Characteristics (continued)
The performance graphs were taken using the Audio Precision AUX-0025 Switching Amplifier measurement Filter in series
with the LC filter on the demo board.
Efficiency vs. Output Power Efficiency vs. Output Power
R
L
= 4Ω, f = 1kHz R
L
= 8Ω, f = 1kHz
Figure 12. Figure 13.
Power Dissipation vs. Output Power Power Dissipation vs. Output Power
R
L
= 4Ω, f = 1kHz R
L
= 8Ω, f = 1kHz
Figure 14. Figure 15.
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