22-W/in3, 93.1% peak efficiency, 100-W USB-PD 3.0 AC/DC adapter reference design with Si MOSFET


Design files


This fully-tested reference design is a high-efficiency, high-power-density, AC/DC adapter solution with a wide input voltage range (100- to 240-V AC) for laptop adapters and smartphone charger applications. This design consists of a front-end transition-mode (TM) power factor correction (PFC) circuit based on the UCC28056 device, followed by an active-clamp flyback for isolated DC/DC conversion based on the UCC28780 device.

  • Relatively low-cost solution
  • Solution based on the both-ended USB Type-C® cable
  • Relatively high power density with active-clamp flyback topology
  • Meets DoE level VI and CoC Tier2 regulations
  • Robust protection built-in
Output voltage options TIDA-010047.1
Vin (Min) (V) 85
Vin (Max) (V) 265
Vout (Nom) (V) 20
Iout (Max) (A) 5
Output Power (W) 100
Isolated/Non-Isolated Isolated
Input Type AC
Topology Boost- Transition Mode^Flyback- Active Clamp
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDUEM3.PDF (3169 K)

Reference design overview and verified performance test data


Detailed schematic diagram for design layout and components


Complete listing of design components, reference designators, and manufacturers/part numbers


Detailed overview of design layout for component placement


Files used for 3D models or 2D drawings of IC components

TIDCFD7.ZIP (1308 K)

Design file that contains information on physical board layer of design PCB

TIDRZD1.ZIP (1002 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Buck converters (integrated switch)

TPS6217728V, 0.5A Step-Down Converter with SNOOZE Mode

Data sheet: PDF | HTML
Flyback controllers

UCC287801-MHz High Frequency Active Clamp Flyback Controller

Data sheet: PDF | HTML
General-purpose op amps

LMC7111Single, 11-V, 50-kHz operational amplifier

Data sheet: PDF
Half-bridge drivers

UCC277121.8-A/2.8-A, 620V half bridge driver with interlock

Data sheet: PDF | HTML
Linear & low-dropout (LDO) regulators

LP2981-N100-mA, 16-V, low-dropout voltage regulator with enable

Data sheet: PDF | HTML
Linear & low-dropout (LDO) regulators

TPS7B4250-Q1Automotive 50-mA, off-battery (40-V), adjustable voltage-tracking low-dropout voltage regulator

Data sheet: PDF | HTML
Power factor correction (PFC) controllers

UCC280566-pin high performance CRM/DCM PFC controller

Data sheet: PDF | HTML
SR & load share controllers

UCC24612High-frequency multi-mode synchronous rectifier controller

Data sheet: PDF | HTML
Shunt voltage references

ATL4312.5-V low-IQ adjustable precision shunt regulator

Data sheet: PDF | HTML
USB Type-C & USB Power Delivery ICs

TPS65987DUSB Type-C® and USB PD controller with integrated power switches

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Design guide 22-W/in3, 93.1% peak efficiency, 100-W USB-PD 3.0 AC/DC adapter reference design Mar. 27, 2019

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