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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) | C | Safety Class | dV/dt(V/µs) | DF @ 1 kHz(%) | RISO | 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-PD2A SMT Power Inductor, 30 MHz, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD2A SMT Power Inductor | Self Resonant Frequency30 MHz | – | – | – | – | – | – | – | Rated Current1.28 A | Inductance12 µH | DC Resistance0.21 Ω | Rated Voltage80 V (DC) | – | – | Length4 mm | Width4.5 mm | Height3.2 mm | MountSMT | – | – | – | – | – | Saturation Current1.62 A | – | Size4532 | – | ||||
 | WE-CMBNC Common Mode Power Line Choke Nanocrystalline, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-CMBNC Common Mode Power Line Choke Nanocrystalline | – | – | – | – | – | – | – | – | Rated Current10 A | Inductance2000 µH | DC Resistance0.0063 Ω | Rated Voltage300 V (DC) | Insulation Test Voltage2100 V (AC) | MaterialNanocrystalline | Length24 mm | Width17 mm | Height25 mm | MountTHT | – | – | – | – | – | – | – | SizeM | – | ||||
 | WCAP-FTX2 Film Capacitors, –, Across the mains | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-FTX2 Film Capacitors | – | Capacitance220 nF | Safety ClassX2 | Rate of Voltage Rise160 V/µs | Dissipation Factor0.1 % | Insulation Resistance30 GΩ | Pitch22.5 mm | PackagingBulk | – | – | – | Rated Voltage275 V (DC) | – | – | Length26 mm | Width6 mm | Height15 mm | MountBoxed THT | – | – | – | – | – | – | – | SizePitch 22.5 mm | – | ||||
| WCAP-FTX2 Film Capacitors, –, Across the mains | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-FTX2 Film Capacitors | – | Capacitance1.5 µF | Safety ClassX2 | Rate of Voltage Rise140 V/µs | Dissipation Factor0.1 % | Insulation Resistance6.67 GΩ | Pitch22.5 mm | PackagingBulk | – | – | – | Rated Voltage275 V (DC) | – | – | Length26 mm | Width10 mm | Height21 mm | MountBoxed THT | – | – | – | – | – | – | – | SizePitch 22.5 mm | – | ||||
 | WE-FB Flyback Transformer suitable for LT3573/ LT3574/ LT3575/ LT3748, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | – | – | – | – | – | – | – | – | – | Inductance100 µH | – | – | Insulation Test Voltage1500 V (AC) | – | Length13.34 mm | Width15.24 mm | Height11.43 mm | – | Input Voltage 36 V (DC) | Output Voltage 124 V | Output Current 10.5 A | Auxiliary Voltage8 V | Turns Ratio2:1:0.33 | Saturation Current1.9 A | Leakage Inductance3 µH | SizeEP10 | IC ReferenceLT3574 & LT3575 | |||||
 | 750344399 | Flyback Transformer, –, – | Simulation– | Downloads– | Status Activei| Production is active. Expected lifetime: >10 years. | Product series Flyback Transformer | – | – | – | – | – | – | – | – | – | Inductance1600 µH | – | – | – | – | Length17.5 mm | Width20 mm | Height14 mm | – | Input Voltage 380 - 400 V (DC) | Output Voltage 115 V | Output Current 10.3 A | Auxiliary Voltage15 V | – | – | – | – | – |