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Texas Instruments UCC256403/UCC28180 | Demoboard TIDA-010080
500-W, >94.5% efficiency analog control AC/DC reference design for 5G telecom rectifier
Overview
| Topology | LLC Resonant Converter |
| Input voltage | 90-265 V |
| Output 1 | 52 V / 10.5 A |
| IC revision | E1 |
Description
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.
Features
- Peak efficiency of 94.5% at 230-V AC and 94% across 30%~100% load
- CCM PFC and half-bridge LLC based (UCC28180 and UCC256403)
- Low iTHD: 30% load at <12%, 50% load at <8%, 100% load at <5.5%
- Good load transient performance at less than 1% regulation
- Meets ±1% accuracy for input power meter across whole load range
- Passive cooling with sealed metal case
Typical applications
- Merchant battery charger
- Industrial AC-DC
- Merchant telecom rectifiers
More information
Products
| Order Code | Datasheet | Simulation | Downloads | 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 890324024005 | SPEC | 7 files | 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 | WCAP-AIG8 Aluminum Electrolytic Capacitors | – | 330 µF | 450 | – | – | – | – | -25 °C up to +85 °C | 10 | 37 | – | – | Tray | 2000 | 2290 | 2970 | 20 | 35 | ||
 | 750344399 | SPEC | – | – | Flyback Transformer | – | – | – | – | – | – | – | – | – | 17.5 | 20 | 14 | – | – | – | – | – | – | |
 | 750344650 | SPEC | – | – | Power Inductor | – | – | – | – | – | – | – | – | – | 24 | 24 | 24.64 | – | – | – | – | – | – | |
| 750344651 | SPEC | – | – | Power Inductor | – | – | – | – | – | – | – | – | – | 36.2 | 40.64 | 38.1 | – | – | – | – | – | – | |
 | 750344508 | SPEC | – | – | Power Transformer | – | – | – | – | – | – | – | – | – | 35.56 | 37.34 | 34.29 | – | – | – | – | – | – |
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
| 890324024005 | SPEC | |
| 861011486022 | SPEC | |
| 750344399 | SPEC | – |
| 750344650 | SPEC | – |
| 750344651 | SPEC | – |
| 750344508 | SPEC | – |
| Samples |
|---|
| Order Code | Datasheet | Simulation | Downloads | 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 |
|---|