Datasheet MAX4295 (Maxim) - 6

Mono, 2W, Switch-Mode (Class D) Audio Power Amplifier Typical Operating Characteristics (continued)
(VCC = PVCC = +3V, input amplifier gain = -1, SHDN = VCC , TA = +25°C, unless otherwise noted.)
EFFICIENCY EFFICIENCY EFFICIENCY vs. OUTPUT POWER (fIN = 1kHz) vs. OUTPUT POWER (fIN = 1kHz) vs. OUTPUT POWER (fIN = 1kHz)
100 100 100 500kHz 500kHz 250kHz 90 90 90
MAX4295
80 MAX4295 toc19 80 MAX4295 toc20 80 MAX4295 toc21 70 250kHz 70 250kHz 70 500kHz 1MHz 60 1MHz 60 1MHz 60 50 50 50 125kHz 40 125kHz 40 40 EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) 30 30 125kHz 30 20 20 20 VCC = +5V V V CC = +5V CC = +5V 10 R 10 10 L = 4Ω R R L = 8Ω L = 32Ω 0 0 0 0 0.5 1.0 1.5 2.0 2.5 0 0.3 0.6 0.9 1.2 1.5 1.8 0 0.1 0.2 0.3 0.4 0.5 OUTPUT POWER (W) OUTPUT POWER (W) OUTPUT POWER (W)
EFFICIENCY EFFICIENCY vs. OUTPUT POWER (fIN = 1kHz) vs. OUTPUT POWER (fIN = 1kHz)
100 100 500kHz 500kHz 90 90 80 MAX4295 toc22 80 MAX4295 toc23 70 70 250kHz 250kHz 1MHz 1MHz 60 60 50 50 40 40 EFFICIENCY (%) EFFICIENCY (%) 125kHz 30 30 125kHz 20 20 VCC = +3V VCC = +3V 10 10 RL = 4Ω RL = 8Ω 0 0 0 0.2 0.4 0.6 0.8 0 0.2 0.4 0.6 0.8 OUTPUT POWER (W) OUTPUT POWER (W)
EFFICIENCY SUPPLY CURRENT vs. OUTPUT POWER (fIN = 1kHz) vs. SUPPLY VOLTAGE
100 10 250kHz A: fOSC = 125kHz 90 D B: fOSC = 250kHz 80 MAX4295 toc24 8 C: fOSC = 500kHz MAX4295 toc25 D: fOSC = 1MHz 70 60 500kHz 1MHz 6 C 50 40 4 EFFICIENCY (%) B 30 125kHz SUPPLY CURRENT (mA) 20 2 VCC = +3V 10 A RL = 32Ω 0 0 0 0.05 0.10 0.15 0.20 0 1 2 3 4 5 OUTPUT POWER (W) SUPPLY VOLTAGE (V)
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