The use of a DC-DC converter module with an integrated transformer is a potentially beneficial choice in a distributed architecture where the smaller size and higher power density is the major focus of the design. These modules are switching at a very high frequency range of 11MHz to 15MHz, which allows for a reduction in the size, height, and weight of a built-in transformer, hence, decreasing the space required by the PCB. These integrated DC-DC converters provide a high level of integration, an elimination of many external components, and help designers achieve robust designs against vibrations with easier PCB layouts. The integrated modules operate in close-loop control, providing a tightly-regulated output, which is advantageous in cases of bidirectional GaN switches with narrow Vgs ranges.

TI offers several variants of the integrated DC-DC modules. These variants provide flexibility for selecting the device that is appropriate for the available input voltage rail of the system and the required output voltage of the system. Table 3-1 shows all variants and the technical specifications.

The requirement of the preregulator to provide a regulated voltage rail to integrated DC-DC modules depends on the power requirement of the isolated gate drivers. As mentioned in Table 3-1, power derates in case of a wide input voltage range while connecting the integrated DC-DC module directly with the battery.