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MAX1553 Datasheet(PDF) 5 Page - Maxim Integrated Products |
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MAX1553 Datasheet(HTML) 5 Page - Maxim Integrated Products |
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5 / 10 page ![]() MAX1553/MAX1554 High-Efficiency, 40V Step-Up Converters for 2 to 10 White LEDs Maxim Integrated | 5 www.maximintegrated.com SWITCHING WAVEFORMS (CONTINUOUS OPERATION, 3.75V Li+ BATTERY, 18mA OUTPUT) MAX1553/54 toc10 2 μs/div VLX VOUT IL 10V/div 200mV/div 200mA/div L1 = 47 μH, 4700pF CAPACITOR ACROSS LEDs SWITCHING WAVEFORMS (DISCONTINUOUS OPERATION, 3.75V Li+ BATTERY, 10mA OUTPUT) MAX1553/54 toc11 2 μs/div VLX VOUT IL 10V/div 200mV/div 200mA/div L1 = 47 μH, 4700pF CAPACITOR ACROSS LEDs STARTUP/SHUTDOWN WAVEFORMS MAX1553/54 toc12 40ms/div VEN VFB VOUT 5V/div 200mV/div 10V/div L1 = 22 μH BRT STEP RESPONSE MAX1553/54 toc13 20ms/div VBRT VFB VOUT 1V/div 200mV/div 2V/div L1 = 22 μH, VBRT = 0.5V TO 1.25V TO O.5V Typical Operating Characteristics (continued) (MAX1553 driving six white LEDs, VCC = VEN = 3.6V, Circuit of Figure 1, TA = +25°C, unless otherwise noted.) |
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