Datasheet MAX845 (Maxim) - 3

Isolated Transformer Driver for PCMCIA Applications MAX845 __________________________________________Typical Operating Characteristics
(Typical Operating Circuit, VIN = 5V, C1 = 0.1µF, C2 = C3 = 0.33µF, T1 = Halo TGM-010P3, CR1 = CR2 = MBR0520, FS = VCC, TA = +25°C, unless otherwise noted.)
SHUTDOWN SUPPLY CURRENT OUTPUT RESISTANCE vs. TEMPERATURE OUTPUT RESISTANCE vs. TEMPERATURE vs. TEMPERATURE
40 7.5 1.6 FIGURE 11c FIGURE 11b SD = V 7.0 CC MAX845-01 MAX845-02 1.4 MAX845-03 ) 35 VIN = 4.5V ) Ω Ω 6.5 6.0 1.2 30 5.5 1.0 25 5.0 0.8 4.5 20 VIN = 5.5V 4.0 0.6 OUTPUT RESISTANCE ( OUTPUT RESISTANCE ( 3.5 SHUTDOWN CURRENT (µA) 15 0.4 3.0 10 2.5 0.2 -40 -20 0 20 40 60 80 100 -40 -20 0 20 40 60 80 100 -40 -20 0 20 40 60 80 100 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C)
D1, D2 FREQUENCY vs. TEMPERATURE D1, D2 FREQUENCY vs. TEMPERATURE SUPPLY CURRENT vs. TEMPERATURE
1000 850 1.7 VIN = 5.0V 950 MAX845-04 1.6 MAX845-06 800 MAX845-05 VIN = 6.0V 900 1.5 VIN = 6.0V 750 FS HIGH 1.4 850 VIN = 5.5V 700 1.3 VIN = 5.5V 800 VIN = 5.0V 1.2 650 750 V FREQUENCY (kHz) FREQUENCY (kHz) 1.1 IN = 5.0V 600 700 VIN = 4.5V SUPPLY CURRENT (mA) 1.0 650 550 FS LOW 0.9 VIN = 4.5V 600 500 0.8 -40 -20 0 20 40 60 80 100 -40 -20 0 20 40 60 80 100 -40 -20 0 20 40 60 80 100 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C)
EFFICIENCY vs. LOAD CURRENT OUTPUT VOLTAGE vs. LOAD CURRENT OUTPUT VOLTAGE vs. LOAD CURRENT
100 7.5 15 TRANSFORMERS TRANSFORMERS 90 7.0 14 MAX845-07 MAX845-08 USED IN FIGURE 11b MAX845-09 USED IN FIGURE 11c 80 FIGURE 11b 6.5 13 TGM-030P3 70 6.0 12 TGM-030P3 60 FIGURE 11c 5.5 11 50 5.0 10 40 4.5 TGM-010P3 9 TGM-010P3 EFFICIENCY (%) 30 OUTPUT VOLTAGE (V) 4.0 OUTPUT VOLTAGE (V) 8 20 3.5 7 TGM-020P3 TGM-020P3 10 3.0 6 0 2.5 5 0 20 40 60 80 100 120 140 160 0 20 40 60 80 100 120 140 160 0 20 40 60 80 100 120 140 160 LOAD CURRENT (mA) LOAD CURRENT (mA) LOAD CURRENT (mA)
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