Reducing Power and Cost for Current Limit Control in Power Supplies

Reducing Power and Cost for Current Limit Control in Power Supplies

Sponsored by Bourns

Designers typically use larger, more expensive inductors to avoid saturation of the magnetics when output power reaches the upper limit before overcurrent protection begins. To avoid higher component and board space costs, Bourns application note demonstrates a way to tighten the current limit, allowing smaller, less expensive inductors using a Polymeric PTC thermistor (PPTC). This approach also gives designers more flexibility to employ a common platform based around one controller chip where the current limit can be modified as required.

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