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The LDS105P is a low cost secondary control circuit for low power applications needing constant voltage and constant current control. It implements a simple single-loop control by modifying the internal reference level as a function of current above the current limit threshold. The current loop reduces the reference by 40mV per mV change at the current sense input. The error amp provides high gain and bandwidth under low voltage operations.

Download the application note, "Designing Battery Chargers using the LDS105P", can be found here