1.XL4015 5A DC to DC CC CV Lithium Battery Step Down Charging Board Function and benefits Nonisolated constant current and constant voltage (CC/CV) charging module for lithium battery packs Converts a wide DC input into a controlled, adjustable charging output to safely charge Liion or Lipoly battery packs Supports up to 5 A charging current, enabling faster charging for common pack sizes Compact, boardlevel design suitable for integration into DIY projects, portable power solutions, and battery chargers Rectification uses nonsynchronous rectification, offering a simple, costeffective solution Compatibility and range Input voltage range: 5 V to 32 V Output voltage range: 0.8 V to 30 V Designed for lithium battery charging applications with adjustable CC/CV charging characteristics Key attributes Function: DCDC buck style CC/CV charger for lithium batteries Compatibility: lithium battery packs (Liion/Lipoly) within the output voltage range Size/form: compact boardlevel module suitable for integration in custom chargers and projects Material and construction: nonisolated design with nonsynchronous rectification (as specified) Performance: adjustable output from 0.8 V to 30 V; current capability up to 5 A; supports CC/CV charging profile Practical use scenarios Scenario 1: Charging a Liion/Lipoly singlecell or multicell pack from a 12 V bench supply by setting the output to the required charging voltage (for example 4.2 V per cell) and configuring the current limit to match pack capacity Scenario 2: Building a portable charger for RC LiPo packs or custom hobby packs by connecting to a 24 V source and setting the output to the appropriate pack voltage within 0.8–30 V Scenario 3: Integrating into a small offgrid power solution or solar charging setup where a stable CC/CV charge is needed for battery packs, using a DC input within the 5–32 V range Notes This module is designed for controlled CC/CV charging of lithium batteries and is not a complete battery management system; use with appropriate battery protection and monitoring as required by your application