80V/50W Upside-Down Buck Reference Design PMP20686 (ACTIVE)

Description & Features

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Key Document

Description

This UCC28730 based upside-down buck design converts a universal line input to a non-isolated 80V/50W output. An additional 12V/600mW output is produced using a UCC28880. The design achieves over 93% efficiency and consumes less than 50mW of standby power.

Features
  • Universal line input 85VAC - 265VAC
  • Over 93% efficiency for low nad high line at 50W
  • Low standby power consumption <50mW
  • 2 layer board, 1 oz copper weight, dimensions are 2.1in x 2.8in x 1in
  • Low cost design

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Schematic/Block Diagram

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Design Guide

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Design Files

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Parametrics
 PMP20686.1
(Output Voltage 1)
PMP20686.2
(Output Voltage 2)
Vin (Min) (V)8585
Vin (Max) (V)265265
Vout (Nom) (V)8012
Iout (Max) (A).625.05
Output Power (W)50.6
Isolated/Non-IsolatedNon-IsolatedNon-Isolated
Input TypeACAC
TopologyBuck- Upside DownBuck- Non Sync

TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
UCC28730  Zero Standby PSR Flyback Controller with CVCC and Wake-Up Monitoring  Offline & isolated DC/DC controllers & converters  Sample & Buy View Design Kits & Evaluation Modules
UCC28880  High Voltage Switcher for Non-isolated AC/DC Conversion  Offline & isolated DC/DC controllers & converters  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
UCC28730 Download Download
UCC28880 Download Download

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 984 21 Jun 2017
Design files (6)
Title Type Size (KB) Date
ZIP 525 21 Jun 2017
ZIP 807 21 Jun 2017
PDF 631 21 Jun 2017
PDF 83 21 Jun 2017
PDF 64 21 Jun 2017
PDF 94 21 Jun 2017

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