IC manufacturers Texas Instruments

IC manufacturers (96)

Texas Instruments UCC256403 | Demoboard TIDA-010081

>95% Efficiency, 1-kW analog control AC/DC reference design for 5G telecom rectifier

Overview

TopologyLLC Resonant Converter
Input voltage85-265 V
Switching frequency35-1000 kHz
Output 154 V / 18.7 A
IC revision00

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

Products

Order Code Data­sheet Simu­lation Downloads Product seriesfres
(MHz)
ApplicationCSafety ClassdV/dt
(V/µs)
DF @ 1 kHz
(%)
RISOOperating TemperaturePitch
(mm)
PackagingIR
(A)
L
(µH)
RDC max.
(Ω)
VR
(V (DC))
VT
(V (AC))
MaterialL
(mm)
W
(mm)
H
(mm)
MountVINVOut1
(V)
IOut1
(A)
Vaux
(V)
nISAT
(A)
LS
(µH)
SizeIC Reference Samples
784773112SPEC
8 files WE-PD2A SMT Power Inductor 30 1.28 12 0.21 80 4 4.5 3.2 SMT 1.62 4532
7448031002SPEC
9 files WE-CMBNC Common Mode Power Line Choke Nanocrystalline 10 2000 0.0063 300 2100 Nanocrystalline 24 17 25 THT M
890324026003SPEC
8 files WCAP-FTX2 Film Capacitors Across the mains220 nF X2 160 0.130 GΩ -40 °C up to +105 °C 22.5 Bulk 275 26 6 15 Boxed THT Pitch 22.5 mm
890324026030SPEC
8 files WCAP-FTX2 Film Capacitors Across the mains1.5 µF X2 140 0.16.67 GΩ -40 °C up to +105 °C 22.5 Bulk 275 26 10 21 Boxed THT Pitch 22.5 mm
750311307SPEC
7 files 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
750344399SPEC
Flyback Transformer 1600 17.5 20 14 380 - 400 V (DC) 15 0.3 15
Samples
Order Code Data­sheet Simu­lation Downloads Product seriesfres
(MHz)
ApplicationCSafety ClassdV/dt
(V/µs)
DF @ 1 kHz
(%)
RISOOperating TemperaturePitch
(mm)
PackagingIR
(A)
L
(µH)
RDC max.
(Ω)
VR
(V (DC))
VT
(V (AC))
MaterialL
(mm)
W
(mm)
H
(mm)
MountVINVOut1
(V)
IOut1
(A)
Vaux
(V)
nISAT
(A)
LS
(µH)
SizeIC Reference Samples