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Off-Line Constant-Voltage Constant-Current Flyback Controller With Primary-Side Regulation (PSR)


Models (1)

Title Category Type Date
UCC28704 PSpice Transient Model PSpice Model ZIP 26 May 2016

Design kits & evaluation modules (1)

Name Part# Type
UCC28704 5V/10W Off-Line Power Supply With PSR for USB Wall Adapters Evaluation Module UCC28704EVM-724 Evaluation Modules & Boards

Reference designs

Universal input reference design for 12-V lead acid battery charger

This reference design takes a Universal AC input (85 VAC - 265 VAC) and converts to a 17.5-V isolated output using a PSR flyback topology. It is then followed by a battery charger circuit, which outputs up to 15 V to a lead acid battery. This is a fast-charge design capable of delivering 12 V @ 2.5 (...)

View the Important Notice for reference designs covering authorized use, intellectual property matters and disclaimers.

Software (2)

UCC28704 MathCad Design Calculator (Rev. A)  (ZIP 1238 KB )    07 Dec 2016  
UCC28704 Excel Design Calculator (Rev. B)  (ZIP 391 KB )    14 Oct 2016  

WEBENCH® Designer UCC28704

 AC  DC  
AC Frequency  60 Hz  50 Hz
Use Isolated Output?
  Min   Max Range
VinRMS  V 85.00 to 2000.00V
Vout  V 3.3 to 1000V
Iout  A ≤ 100A
Ambient Temp  °C -20 to 125°C