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Texas Instruments UCC256403 | Demoboard TIDA-010081
>95% Efficiency, 1-kW analog control AC/DC reference design for 5G telecom rectifier
Overview
| Topology | LLC Resonant Converter |
| Input voltage | 85-265 V |
| Switching frequency | 35-1000 kHz |
| Output 1 | 54 V / 18.7 A |
| IC revision | 00 |
Description
This compact, high efficiency reference design with a 54-V DC, 1000-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 95.9% 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 95.9% at 230-V AC and 95% 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
- 5G telecom rectifier, Merchant telecom rectifiers
- Industrial AC/DC
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Status | Product series | fres (MHz) | Application | C | Safety Class | dV/dt (V/µs) | DF @ 1 kHz (%) | RISO | Operating Temperature | Pitch (mm) | Packaging | IR (A) | L (µH) | RDC max. (Ω) | VR (V (DC)) | VT (V (AC)) | Material | L (mm) | W (mm) | H (mm) | Mount | VIN | VOut1 (V) | IOut1 (A) | Vaux (V) | n | ISAT (A) | LS (µH) | Size | IC Reference | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 784773112 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WE-PD2A SMT Power Inductor | 30 | – | – | – | – | – | – | – | – | – | 1.28 | 12 | 0.21 | 80 | – | – | 4 | 4.5 | 3.2 | SMT | – | – | – | – | – | 1.62 | – | 4532 | – | ||
 | 7448031002 | SPEC | 10 files | Active i| Production is active. Expected lifetime: >10 years. | WE-CMBNC Common Mode Power Line Choke Nanocrystalline | – | – | – | – | – | – | – | – | – | – | 10 | 2000 | 0.0063 | 300 | 2100 | Nanocrystalline | 24 | 17 | 25 | THT | – | – | – | – | – | – | – | M | – | ||
 | 890324026003 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-FTX2 Film Capacitors | – | Across the mains | 220 nF | X2 | 160 | 0.1 | 30 GΩ | -40 °C up to +105 °C | 22.5 | Bulk | – | – | – | 275 | – | – | 26 | 6 | 15 | Boxed THT | – | – | – | – | – | – | – | Pitch 22.5 mm | – | ||
| 890324026030 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-FTX2 Film Capacitors | – | Across the mains | 1.5 µF | X2 | 140 | 0.1 | 6.67 GΩ | -40 °C up to +105 °C | 22.5 | Bulk | – | – | – | 275 | – | – | 26 | 10 | 21 | Boxed THT | – | – | – | – | – | – | – | Pitch 22.5 mm | – | ||
 | 750311307 | SPEC | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WE-FB Flyback Transformer suitable for LT3573/ LT3574/ LT3575/ LT3748 | – | – | – | – | – | – | – | -40 °C up to +125 °C | – | – | – | 100 | – | – | 1500 | – | 13.34 | 15.24 | 11.43 | – | 36 V (DC) | 24 | 0.5 | 8 | 2:1:0.33 | 1.9 | 3 | EP10 | LT3574 & LT3575 | ||
 | 750344399 | SPEC | – | – | Active i| Production is active. Expected lifetime: >10 years. | Flyback Transformer | – | – | – | – | – | – | – | – | – | – | – | 1600 | – | – | – | – | 17.5 | 20 | 14 | – | 380 - 400 V (DC) | 15 | 0.3 | 15 | – | – | – | – | – |
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
| 784773112 | SPEC | |
| 7448031002 | SPEC | |
| 890324026003 | SPEC | |
| 890324026030 | SPEC | |
| 750311307 | SPEC | |
| 750344399 | SPEC | – |
| Samples |
|---|
| Order Code | Datasheet | Simulation | Downloads | Status | Product series | fres (MHz) | Application | C | Safety Class | dV/dt (V/µs) | DF @ 1 kHz (%) | RISO | Operating Temperature | Pitch (mm) | Packaging | IR (A) | L (µH) | RDC max. (Ω) | VR (V (DC)) | VT (V (AC)) | Material | L (mm) | W (mm) | H (mm) | Mount | VIN | VOut1 (V) | IOut1 (A) | Vaux (V) | n | ISAT (A) | LS (µH) | Size | IC Reference | Samples |
|---|