High efficiency, ultra-wide input (20 VDC to 375 VDC) isolated power supply reference design
PMP30720
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Key Document

Description

This reference design uses the UCC28C42 boost controller and the UCC28780 active-clamp flyback controller to generate an isolated output of 24 V at 3.5 A over an ultra-wide input voltage range of 20 V to 375 V. The design also uses the UCC24612 synchronous rectifier controller on the secondary side. Zero voltage switching (ZVS) ensures high efficiency over a wide operating range.                                                                                  

Features
  • Zero voltage switching (ZVS) provides high efficiency (94% peak value)
  • Two-stage power supply allows an extremely wide input range (20 V to 375 V)
  • Adaptive burst-mode feature maintains high efficiency even at light loads
  • Synchronous rectifier using drain-to-source voltage sensing

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Schematic/Block Diagram

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Design Guide

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Design Files

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Parametrics
 PMP30720.1
(Output Voltage 1)
Vin (Min) (V)20
Vin (Max) (V)375
Vout (Nom) (V)24
Iout (Max) (A)3.5
Output Power (W)84
Isolated/Non-IsolatedIsolated
Input TypeDC
TopologyBuck- Non Sync
Flyback- Active Clamp

TI Devices (5)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
ATL431LI  High-bandwidth, low-IQ programmable shunt regulator (pinout: KRA)  Voltage references  Sample & Buy View Design Kits & Evaluation Modules
UCC24612  High-frequency multi-mode synchronous rectifier controller  Offline & isolated DC/DC controllers & converters  Sample & Buy View Design Kits & Evaluation Modules
UCC27712  620-V, 1.8-A, 2.8-A High-Side Low-Side Gate Driver with Interlock  Gate drivers  Sample & Buy View Design Kits & Evaluation Modules
UCC28780  Adaptive zero voltage switching active-clamp flyback controller  Offline & isolated DC/DC controllers & converters  Sample & Buy View Design Kits & Evaluation Modules
UCC28C42  BiCMOS Low Current 8 Pin PWM Current Mode Controller  Offline & isolated DC/DC controllers & converters  Sample & Buy Not Available

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
ATL431LI Download Download
Download Download
UCC24612 Download Download
UCC27712 Download Download
UCC28780 Download
Download Download
UCC28C42 Download Download
Download Download
Download Download

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 2621 16 Oct 2019
Design files (6)
Title Type Size (KB) Date
ZIP 1465 16 Oct 2019
ZIP 1494 16 Oct 2019
PDF 101 16 Oct 2019
PDF 53 16 Oct 2019
PDF 48 16 Oct 2019
PDF 433 16 Oct 2019

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