1 Description

This isolated power supply provides dual +15-V outputs at 120 mA each. This power supply is designed for biasing a MOSFET-based power stage that generates excitation for a separately excited synchronous motor (SSM). This design uses a combination of the LMR50410-Q1 buck pre-regulator and the SN6505-Q1 open-loop transformer driver with spread-spectrum modulation. The wide input voltage range and flexibility make this design a versatile solution for wide range of applications where isolated power is necessary. This internal reference design is an alternative to the PMP22760 which uses a single-chip solution based on the LM5180-Q1.

Figure 1-1 PCB Top View

Figure 1-2 PCB Bottom View

Figure 1-3 PCB Aerial View

Figure 1-4 PCB Side View

Figure 1-5 Functional Block Diagram