This pre-regulated isolated open-loop LLC transformer driver converter reference design provides four 18-V outputs up to a total of 6 W for traction-inverter applications. The 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. The boost pre-regulator is designed to provide 7.5 W to the LLC converter, which can support a maximum of 6-W output.
| Output voltage options | PMP23061.1 | PMP23061.2 | PMP23061.3 | PMP23061.4 |
|---|---|---|---|---|
| Vin (Min) (V) | 6 | 6 | 6 | 6 |
| Vin (Max) (V) | 28 | 28 | 28 | 28 |
| Vout (Nom) (V) | 18 | 18 | 18 | 18 |
| Iout (Max) (A) | .166 | .055 | .055 | .055 |
| Output Power (W) | 2.988 | .99 | .99 | .99 |
| Isolated/Non-Isolated | Isolated | Isolated | Isolated | Isolated |
| Input Type | DC | DC | DC | DC |
| Topology | Boost- Non Sync^Other | Boost- Non Sync^Other | Boost- Non Sync^Other | Boost- Non Sync^Other |
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
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Detailed overview of design layout for component placement
Complete listing of design components, reference designators, and manufacturers/part numbers
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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
Detailed schematic diagram for design layout and components
Includes TI products in the design and potential alternatives.
| Type | Title | Date | ||
|---|---|---|---|---|
| Product overview | Isolated Power Topologies for PLC I/O Modules and Other Low-Power Applications (Rev. A) | PDF | HTML | Aug 20, 2024 | |
| White paper | Addressing High-Volt Design Challenges w/ Reliable and Affordable Isolation Tech (Rev. C) | PDF | HTML | Sep 26, 2023 | |
| User guide | Pre-Regulated Isolated Driver Bias Supply Ref. Design for Traction-Inverter Apps | PDF | HTML | Sep 9, 2021 |
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