This reference design is an open-loop LLC converter, which provides four 18-V and 2.5 V outputs and up to 2.4 W for onboard charger applications. UCC25800-Q1 is used as the controller. LLC topology allows the transformer to have significant leakage inductance, but a much smaller primary-secondary capacitance, which significantly reduces common-mode current injection through the bias transformer.
| Output voltage options | PMP40980.1 | PMP40980.2 | PMP40980.3 | PMP40980.4 |
|---|---|---|---|---|
| Vin (Min) (V) | 12 | 12 | 12 | 12 |
| Vin (Max) (V) | 12 | 12 | 12 | 12 |
| Vout (Nom) (V) | 20.5 | 20.5 | 20.5 | 20.5 |
| Iout (Max) (A) | .03 | .03 | .03 | .03 |
| Output Power (W) | .615 | .615 | .615 | .615 |
| Isolated/Non-Isolated | Isolated | Isolated | Isolated | Isolated |
| Input Type | DC | DC | DC | DC |
| Topology | Half Bridge- LLC | Half Bridge- LLC | Half Bridge- LLC | Half Bridge- LLC |
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
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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 | ||
|---|---|---|---|---|
| Test report | Multiple Output Isolated SiC Driver Bias Sup. Ref. Des. for Onboard Charger Apps | PDF | HTML | Jan. 10, 2022 |
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