LM4675SDBD Datasheet, PDF (8/23 Pages) Texas Instruments – Ultra-Low EMI, Filterless, 2.65W, Mono, Class D Audio Power Amplifier with Spread Spectrum

LM4675, LM4675SDBD, LM4675TLBD
SNAS353C – AUGUST 2006 – REVISED MAY 2013
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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.
Output Power vs. Supply Voltage
R_L = 4Ω, f = 1kHz
4
Output Power vs. Supply Voltage
R_L = 8Ω, f = 1kHz
2
3
THD+N = 10%
2
1
THD+N = 1%
1.5
THD+N = 10%
1
THD+N = 1%
0.5
0
2.5 3 3.5 4 4.5 5 5.5
SUPPLY VOLTAGE (V)
Figure 17.
PSRR vs. Frequency
V_DD = 3.6V ,V_RIPPLE = 200mV_P-P, R_L = 8Ω
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
10
100
1000 10000 100000
FREQUENCY (Hz)
Figure 19.
Supply Current vs. Supply Voltage
No Load
5
0
2.5 3 3.5 4 4.5 5 5.5
SUPPLY VOLTAGE (V)
Figure 18.
CMRR vs. Frequency
V_DD = 3.6V, V_CM = 1V_P-P, R_L = 8Ω
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
10
100
1000 10000 100000
FREQUENCY (Hz)
Figure 20.
Shutdown Supply Current vs. Supply Voltage
No Load
0.05
4
0.04
3
0.03
2
0.02
1
0.01
0
2.5 3 3.5 4 4.5 5 5.5
SUPPLY VOLTAGE (V)
Figure 21.
0
2.5 3 3.5 4 4.5 5 5.5
SUPPLY VOLTAGE (V)
Figure 22.
8
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