dc/dc converter`s current-limit


Posted on Jan 14, 2013

The circuit in Figure 1 shows how a thermistor applies temperature compensation to the circuit`s output-current limit. The MAX1714`s linear current-limit (ILIM) input range at Pin 6 of IC1 spans 0.5 to 2V, which corresponds to current-limit thresholds of 50 to 200 mV, respectively.



However, Figure 2 shows that the current limit varies from 9A at 40°C to 6A at 85°C. To design the temperature-compensation network, begin by breadboarding the circuit and using an external power supply to vary the MAX1714`s current-lim




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