65-W USB Type-C ZVS-flyback reference design
PMP21552
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Description

This reference design is a low-cost, high-density USB adapter that uses the UCC28780 active-clamp flyback controller and UCC5304 isolated driver in a ZVS-flyback topology. The maximum power rating is 65 W at 20-V output but is adjustable for 20-V/15-V/9-V/5-V output voltage and 3 A.  This design reaches a peak efficiency of 93.2%. The average efficiency and standby power levels are designed to meet DoE level VI and CoC Tier 2 limits.  The compact design has dimensions of 45 mm by 55 mm by 25mm (62cc).

Features
  • Compact size of 45mm by 55mm by 25mm (62cc)
  • High efficiency, 93.2% peak
  • EMI data provided in test report, below CISPR32 limits
  • Supports variable output voltage 5 V to 20 V
  • Designed to meet efficiency and standby requirements of DoE Level VI and CoC Tier 2

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Schematic/Block Diagram

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Design Guide

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Design Files

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Parametrics
 PMP21552.1
(Output Voltage 1)
Vin (Min) (V)85
Vin (Max) (V)265
Vout (Nom) (V)20
Iout (Max) (A)3.25
Output Power (W)65
Isolated/Non-IsolatedIsolated
Input TypeAC
TopologyFlyback- Synchronous

TI Devices (5)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
ATL431  2.5-V low-IQ adjustable precision shunt regulator  Voltage references  Sample & Buy View Design Kits & Evaluation Modules
TPS7B4250-Q1  Automotive 50-mA, off-battery (40-V), adjustable voltage-tracking low-dropout voltage regulator  Power management  Sample & Buy View Design Kits & Evaluation Modules
UCC27517  4-A/4-A single-channel gate driver with 5-V UVLO and 13-ns prop delay in SOT-23 package  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
UCC5304  4-A source, 6-A sink single-channel reinforced isolation gate driver with high noise immunity  Gate drivers  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
ATL431 Download Download
TPS7B4250-Q1 Download Download
UCC27517 Download
UCC28780 Download
Download Download
UCC5304 Download

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Technical documentation

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User guides (1)
Title Type Size (KB) Date
PDF 12221 04 Jun 2020
Design files (6)
Title Type Size (KB) Date
PDF 303 04 Jun 2020
PDF 1362 04 Jun 2020
ZIP 574 04 Jun 2020
ZIP 2006 04 Jun 2020
PDF 344 04 Jun 2020
PDF 318 04 Jun 2020

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