Experimental Resultsįigure 1 shows four MAX40200 devices paralleled to up to 4A of current. This allows us to use two in parallel for a 2A system and, by extension, four in parallel for a 4A system. The multiple ideal-diode solution should provide the same characteristics of a single, larger device with a factor based on the number of MAX40200 devices being used. This application note investigates using multiple MAX40200 devices in parallel and their combined performance. One useful aspect of ideal diodes such as the MAX40200 is that because they are implemented with MOSFETs and not diodes, they inherently share any load current. In many circuits, the functionality of an ideal diode is required but at much higher currents. Enable/disable control and thermal shutdown.Tiny voltage-drop of approximately 18mV for I F up to 100mA.Low power dissipation at 1A, just 125μW.The MAX40200 ideal diode has many benefits including the following: The MAX40200 operates from a 1.5V to 5.5V supply voltage. When reversed-biased, it leaks less than many comparable Schottky diodes. When disabled (EN = low), it blocks voltages up to 6V in either direction, making it suitable for most low-voltage, portable electronic devices. The device thermally protects itself, and any downstream circuitry, from overtemperature conditions. The MAX40200 is an ideal diode current switch that drops so little voltage that it approaches an order of magnitude better than Schottky diodes. The multiple ideal-diode solution should provide the same characteristics of a single, larger device with a factor based on the number of MAX40200 ICs being used. This application note investigates using multiple MAX40200 ICs in parallel and their combined performance.
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