330-W, 95.5% Efficiency and 18-W/in3 density, bridgeless PFC+LLC reference design TIDA-010028 (ACTIVE)

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Key Document

Description

This reference design is a compact, high efficiency, bridgeless 330-W, 19.5-V output AC/DC reference design. This design consists of a front-end, bidirectional bridgeless boost power factor correction (PFC) based on the UCC28180A device, achieving end-to-end peak efficiency of > 94% at 90 V AC input and > 95.5% at 230 V AC input. The DC/DC is implemented using the HB-LLC stage implemented using our UCC256301 device. The design uses UCC24624 for synchronous rectification at the secondary side to improve efficiency.

Features
  • Full load efficiency at 230 V AC > 95.5% and >94% at 90 V AC
  • High power factor > 0.99, meeting PFC regulations and current THD as per IEC 61000-3- 2 Class A
  • < 0.25-W standby power with burst mode in both PFC and LLC stages
  • ZCS avoidance feature and OVP sensing feature in LLC controller improves robustness and protects systems from overcurrent, short circuit and overvoltage to ensure safety
  • Small 152 mm × 75 mm × 25 mm PCB form factor

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Parametrics
 TIDA-010028.1
(Output Voltage 1)
Vin (Min) (V)85
Vin (Max) (V)265
Vout (Nom) (V)19.5
Iout (Max) (A)17
Output Power (W)331.5
Isolated/Non-IsolatedIsolated
Input TypeAC
TopologyBoost- DCM
Half Bridge- LLC

TI Devices (7)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
ATL431  2.5V low-Iq adjustable precision shunt regulator  Voltage references  Sample & Buy View Design Kits & Evaluation Modules
CSD18533Q5A  60V N-Channel NexFET Power MOSFET  MOSFETs  Sample & Buy View Design Kits & Evaluation Modules
LP2951  30V, 100mA Micropower Voltage Regulators with Shutdown  Power management  Sample & Buy View Design Kits & Evaluation Modules
UCC24624  High frequency Dual Synchronous Rectifier Controller for LLC Converter  Offline & isolated DC/DC controllers & converters  Sample & Buy View Design Kits & Evaluation Modules
UCC256301  Wide Vin LLC Resonant Controller With High-Voltage Start Up Enabling Ultra-Low Standby Power  Offline & isolated DC/DC controllers & converters  Sample & Buy View Design Kits & Evaluation Modules
UCC28180  8-Pin Continuous Conduction Mode (CCM) PFC Controller  Offline & isolated DC/DC controllers & converters  Sample & Buy View Design Kits & Evaluation Modules
UCC5350  5A/5A, 3-kVRMS Single-Channel Isolated Gate Driver With Miller Clamp (M) or With Split Output (S)  Gate drivers  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
ATL431 Download Download
CSD18533Q5A VSONP (DQJ)| 8 Download
LP2951 Download -
Download -
Download -
UCC256301 Download Download
UCC28180 Download
UCC5350 Download Download

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 1963 19 Dec 2018
Design files (6)
Title Type Size (KB) Date
PDF 766 15 Apr 2019
ZIP 7976 15 Apr 2019
ZIP 900 19 Dec 2018
PDF 2179 19 Dec 2018
PDF 538 19 Dec 2018
PDF 60 19 Dec 2018

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