Dual 15-V: 120-mA isolated bias power supply reference design using buck and push-pull converters
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 a versatile design 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 LM5180-Q1.
Features
- Cost sensitiveSmall form-factorLow primary-to-secondary capacitanceScalable for a wide range of applicationsCatalog parts: including the transformer
Applications
- Battery cell formation & test equipment
- Traction inverter-high voltage
- Traction inverter-low voltage
- 1-phase AC-digital control
- 3-phase AC-digital control
- OBC-wireless charging
- Auxiliary-power supplies
- Unidirectional 400 V & 800 V to LV
- Unidirectional HV-to-LV digital loop
- Bidirectional 400-V & 800-V to LV
Product Categories
- Power management