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Texas Instruments UCC21220AD | Demoboard PMP30446
Peak Efficiency at 99%, 585-W High-Voltage Buck Reference Design With Standard Si-MOSFETs
Overview
| Topology | Buck Converter |
| Input voltage | 450-780 V |
| Output 1 | 390 V / 1.5 A |
| IC revision | 1 |
Description
This reference design converts a DC-input source in the range of 450 V to 780 V into non-isolated 390 V at 1.5A. This is an alternative solution to SiC-FET and SiC-Diode Buck converter, since the actual power stage uses only standard silicon components. In order to employ 600 V rated devices, the input source has been split so that two identical buck stages share the center point. A single coupled inductor (1:1) balances automatically the center point. Two small-series inductors limit the current in each branch in case of voltage imbalance and any small variation in the gate drive delay time of the two FETs. The converter minimizes the switching loss as a result of CRM mode (critical conduction mode), achieving peak efficiency of 99% at 450 V input voltage and full load.
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | C | Tol. C | VR(V (DC)) | Size | Operating Temperature | DF(%) | RISO | Ceramic Type | L(mm) | W(mm) | H(mm) | Fl(mm) | Packaging | VIN | VOut1(V (DC)) | IOut1(A) | Type of Insulation | fswitch(kHz) | ∫Udt(Vµs) | NPRI : NSEC | L(µH) | VT(V (AC)) | Mount | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| WCAP-CSGP MLCCs 50 V(DC), 1 nF, ±10% | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | Capacitance1 nF | Capacitance±10% | Rated Voltage50 V (DC) | Size0603 | Operating Temperature -55 °C up to +125 °C | Dissipation Factor2.5 % | Insulation Resistance10 GΩ | Ceramic TypeX7R Class II | Length1.6 mm | Width0.8 mm | Height0.8 mm | Pad Dimension0.4 mm | Packaging7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | |||||
 | WE-PPTI Push-Pull Transformers, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PPTI Push-Pull Transformers | – | – | – | Size1006 | Operating Temperature -40 °C up to +125 °C | – | – | – | Length6.73 mm | Width10.2 mm | Height4.19 mm | – | PackagingTape and Reel | Input Voltage 5 V (DC) | Output Voltage 15 V (DC) | Output Current 10.6 A | Type of InsulationFunctional | Switching Frequency 300 - 620 | Voltage-µSecond11 Vµs | Turns Ratio1:1.3 | Inductance475 µH | Insulation Test Voltage2500 V (AC) | MountSMT | |||
750317489 | PFC Inductor, –, – | Simulation– | Downloads– | Status Activei| Production is active. Expected lifetime: >10 years. | Product series PFC Inductor | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |