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Texas Instruments UCC25800-Q1 | Demoboard PMP23240
3-W LLC bias supply with dual 18-V output reference design
Overview
| Topology | LLC Resonant Converter |
| Input voltage | 11.4-12.6 V |
| Output 1 | 18 V / 0.09 A |
| IC revision | A |
Description
This reference design uses a single UCC25800-Q1 to drive two LLC transformers with 600-kHz switching frequency. The transformer used in this design is 750319177 which is an off-the-shelf catalog transformer featuring low-interwinding capacitance of 0.68-pF typical which is beneficial for minimizing common-mode current in gate driver bias applications with high slew rates. This design generates two isolated 18-V rails. Each output can be loaded to 1.5 W.
Features
- 78.8% peak efficiency
- Catalog, off-the-shelf transformer with 0.68-pF interwinding capacitance
- Single-sided assembly
Typical applications
- Single phase online UPS,Three phase UPS
More information
Products
Order Code | Datasheet | Downloads | Status | Product series | VIN(V) | VOut1(V) | PO(W) | CWW 1(pF) | L(µH) | ∫Udt(µVs) | fswitch(kHz) | n | Version | IC Reference | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-AGDT Auxiliary Gate Drive Transformer, 7.5, 13 V | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-AGDT Auxiliary Gate Drive Transformer | Input Voltage 7.5 | Output Voltage 113 V | Total Output Power4.55 W | Interwinding Capacitance0.68 pF | Inductance16.5 µH | Voltage-µSecond36 µVs | Switching Frequency 500 | Turns Ratio1:1.67 | VersionLLC | IC ReferenceUCC25800 |