Topology | LLC Resonant Converter |
Input voltage | 90-265 V |
Output 1 | 52 V / 10.5 A |
IC revision | E1 |
This compact, high efficiency reference design with a 48-V DC, 500-W output targets 5G telecom power and industrial AC/DC power supplies. The circuit consists of a front-end continuous conduction mode (CCM) power factor correction (PFC) circuit based on the UCC28180, followed by a robust LLC stage for an isolated DC/DC converter based on the UCC256403. For high efficiency needs, the UCC24624 handles synchronous rectification. This design uses an auxiliary power supply flyback with the UCC28911, which has an internal high-voltage MOSFET. This design enables 94.5% peak efficiency and allows the system to work without forced cooling. The whole system has low iTHD, with 30% load at <12%, 50% load at <8%, 100% load at <5.5% and good load transient performance.
Order Code | Datasheet | Simulation | Downloads | Status | Product series | Application | C | VR (V (AC)) | Safety Class | dV/dt (V/µs) | DF @ 1 kHz (%) | RISO | Operating Temperature | Pitch (mm) | L (mm) | W (mm) | H (mm) | Packaging | Endurance (h) | IRIPPLE (mA) | ILeak (µA) | DF (%) | Ø D (mm) | Samples | |
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890324024005 | SPEC | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-FTX2 Film Capacitors | Across the mains | 470 nF | 275 | X2 | 280 | 0.1 | 21.28 GΩ | -40 °C up to +105 °C | 12.5 | 15 | 10 | 16 | Bulk | – | – | – | – | – | |||
861011486022 | SPEC | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-AIG8 Aluminum Electrolytic Capacitors | – | 330 µF | 450 | – | – | – | – | -25 °C up to +85 °C | 10 | 37 | – | – | Tray | 2000 | 2290 | 2970 | 20 | 35 | |||
750344399 | SPEC | – | – | Active i| Production is active. Expected lifetime: >10 years. | Flyback Transformer | – | – | – | – | – | – | – | – | – | 17.5 | 20 | 14 | – | – | – | – | – | – | ||
750344650 | SPEC | – | – | Active i| Production is active. Expected lifetime: >10 years. | Power Inductor | – | – | – | – | – | – | – | – | – | 24 | 24 | 24.64 | – | – | – | – | – | – | ||
750344651 | SPEC | – | – | Active i| Production is active. Expected lifetime: >10 years. | Power Inductor | – | – | – | – | – | – | – | – | – | 36.2 | 40.64 | 38.1 | – | – | – | – | – | – | ||
750344508 | SPEC | – | – | Active i| Production is active. Expected lifetime: >10 years. | Power Transformer | – | – | – | – | – | – | – | – | – | 35.56 | 37.34 | 34.29 | – | – | – | – | – | – |
Order Code | Datasheet | Simulation | |
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890324024005 | SPEC | ||
861011486022 | SPEC | ||
750344399 | SPEC | – | |
750344650 | SPEC | – | |
750344651 | SPEC | – | |
750344508 | SPEC | – |
Samples |
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Order Code | Datasheet | Simulation | Downloads | Status | Product series | Application | C | VR (V (AC)) | Safety Class | dV/dt (V/µs) | DF @ 1 kHz (%) | RISO | Operating Temperature | Pitch (mm) | L (mm) | W (mm) | H (mm) | Packaging | Endurance (h) | IRIPPLE (mA) | ILeak (µA) | DF (%) | Ø D (mm) | Samples |
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