D2-45057_14 Datasheet, PDF (14/31 Pages) Intersil Corporation – Intelligent Digital Amplifier PWM Controller and Audio Processor

D2-45057, D2-45157
Typical Performance Characteristics
Test Considerations
• Typical performance measurements are made using an Audio Precision™ 2700 Series audio analyzer.
• Precision power resistors are used for the 8Ω loudspeaker loads
• Measurements are done using a +HV supply of +24.0VDC.
Full-Bridge Typical Performance Curves
10.00
HVDD = 24.0V,
5.00 _{8Ω LOAD, 1kHz}
2.00
1.00
0.50
0.20
0.10
0.05
0.02
0.01
0.06 0.1 0.2 0.5 1 2
5 10 20 50
POWER (W)
FIGURE 4. THD vs POWER, FULL-BRIDGE
1.000
0.500
0.200
0.100
0.050
P = 7W
0.020
0.010
0.005
P = 25W
P = 14W
P = 1W
0.002 ^{HVDD = 24.0V, 8Ω LOAD,}
AT 1W, 7W, 14W, 25W POWER OUT
0.001
20
50 100 200 500 1k 2k
FREQUENCY (Hz)
5k 10k 20k
FIGURE 5. THD vs FREQUENCY, FULL-BRIDGE
6
5 ^{HVDD = 24.0V,}
8Ω LOAD, 3.5W
4
3
2
1
-0
-1
-2
-3
-4
-5
-6
30 50
100 200 500 1k 2k
FREQUENCY (Hz)
5k 10k
FIGURE 6. FREQUENCY RESPONSE, FULL-BRIDGE
-50
-55 HVDD = 24.0V, 8Ω LOAD,
-60 ^{AT 1kHz, REFERENCE TO 30W}
-65
-70
-75
-80
-85
-90
-95
-100
-105
< -115dB, UN-WEIGHTED
-110
-115
-120
-60 -55 -50 -45 -40 -35 -30 -25 -20 -15 -10 -5 +0
dBFS
FIGURE 7. NOISE FLOOR, FULL-BRIDGE
14
FN6785.0
July 29, 2010