This reference design provides isolated +24V (45W), ±16 V (4.5W), and +6V (0.5W) outputs to power the control electronics in variable speed drives. The power supply can be either powered directly from 3-phase AC mains (380Vac to 690Vac) or can be powered from the DC-link voltage (400Vdc to 1200Vdc). This design uses a quasi-resonant flyback topology and is rated for 50-Watt total output power. The line and load regulation of the power supply is designed to be within 5% using primary-side regulation (eliminating costly feedback components). The power supply is designed to meet the clearance, creepage, and isolation test voltages as per IEC61800-5 requirements.
| Output voltage options | TIDA-00173.1 |
|---|---|
| Vin (Min) (V) | 400 |
| Vin (Max) (V) | 1200 |
| Vout (Nom) (V) | 24 |
| Iout (Max) (A) | 2 |
| Output Power (W) | 48 |
| Isolated/Non-Isolated | Isolated |
| Input Type | DC |
| Topology | Flyback- Quasi Resonant |
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
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Reference design overview and verified performance test data
Detailed schematic diagram for design layout and components
Complete listing of design components, reference designators, and manufacturers/part numbers
Detailed overview of design layout for component placement
Detailed overview of design layout for component placement
Design file that contains information on physical board layer of design PCB
PCB layer plot file used for generating PCB design layout
Includes TI products in the design and potential alternatives.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Design guide | 400- to 690-V AC Input 50-W Flyback Isolated Power Supply for Motor Drives (Rev. B) | May 01, 2019 |
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