This reference design provides an isolated, 28V/3A output from a standard telecom 36V to 72V input at >88% efficency. The LM5020-1 is a PWM controller with wide input voltage range allowing the converter to be powered directly from the input line and eliminating the need for an auxilliary transformer winding. Output voltage regulation is based on current mode control, simplifying loop compensation. LM5020-1 is capable of supporting duty cycles up to 80% using internal slope compensation allowing the controller to support a wide range of power configurations.
| Output voltage options | PMP20777.1 |
|---|---|
| Vin (Min) (V) | 36 |
| Vin (Max) (V) | 72 |
| Vout (Nom) (V) | 28 |
| Iout (Max) (A) | 3 |
| Output Power (W) | 84 |
| Isolated/Non-Isolated | Isolated |
| Input Type | DC |
| Topology | Flyback- Non Sync |
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
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Test results for the reference design, including efficiency graphs, test prerequisites and more
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
PCB layer plot file used for generating PCB design layout
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Test report | PMP20777 Test Results | May 31, 2017 |
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