The DC to DC Buck Converter accepts a 1224V DC input and provides a fixed 4.2V DC output with a maximum current rating of 25A. It acts as a stepdown voltage reducer, enabling higher voltage sources to power 4.2V loads directly from a single supply. Key benefits Fixed 4.2V output from 1224V input, enabling Liion related applications and other 4.2V devices to be powered from a single highervoltage source. current capability with up to 25A output, suitable for demanding loads and battery charging circuits. Simple, direct conversion from common vehicle or industrial power sources to a stable 4.2V rail. Key attributes Functionality: DCDC buck converter (stepdown regulator) with a fixed 4.2V output. Input compatibility: Wide input range of 12V to 24V DC. Output: Fixed 4.2V DC. Current rating: Up to 25A maximum output current. Design purpose: Converts higher DC voltages to a lowvoltage 4.2V supply for compatible devices and charging circuits. Form factor: Compact module designed for straightforward integration into electronics projects or vehicles. Material and construction: Built as a standard DCDC converter module suitable for use in typical electronics assemblies (specific materials not stated). Performance considerations Maximum output current is 25A. Plan for appropriate wiring and heat management to maintain performance under full load. Output is fixed at 4.2V. For battery charging or 4.2Vspecific applications, ensure integration with proper battery management and charging practices. Compatibility and use Ideal when a 4.2V rail is required but only 1224V sources are available, such as vehicle power systems or industrial power supplies. Compatible with Liion related circuits that require a precise 4.2V reference or charging stage, provided appropriate safety and battery management is observed. Useful in DIY electronics, prototyping, and compact power solutions where a reliable 4.2V supply is needed from a highervoltage source. Use cases Powering a Liion charging circuit from a 12V or 24V supply by providing a fixed 4.2V output for celllevel charging stages. Supplying a 4.2V load in automotive or offroad equipment that runs on a 1224V system, enabling direct connection to a stable lowvoltage rail. Prototyping and testing 4.2V devices or battery management circuits in hobbyist or professional projects using common vehicle or industrial power sources. Notes For safety and reliability, use appropriate wiring, connectors, and heat dissipation when operating at current. This module provides a fixed 4.2V output; it is not a complete Liion charging controller. Use alongside proper battery management and charging circuitry to ensure safe charging of Liion cells.