A DC/DC charger, also known as a DC-to-DC converter or simply a DC charger, is a device that converts one DC voltage level to another. It is  used to regulate and fully charge a secondary battery system from a primary battery system in applications such as automotive, marine, and RV systems.
In a DC/DC charger, the input voltage from the primary battery system is stepped down or up to a different voltage level that is appropriate for charging the secondary battery system. This is achieved using electronic components such as inductors, capacitors, and semiconductors that are configured in a specific circuit topology.
DC/DC chargers can provide several benefits over traditional AC chargers in certain applications, including improved efficiency, faster charging times, and greater flexibility in terms of input and output voltage ranges. They are commonly used in off-grid and mobile applications where access to AC power may be limited or non-existent.
Topo’s Built-in DC/DC chargers are compatible with the primary battery charging system used in all make and vehicles including smart alternators and are designed and profiled to suit the lithium batteries used in Topo’s battery systems.
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