Primary Side Regulated Flyback Reference Design with 120VAC Input and 24V/4A Rated Output

(ACTIVE) PMP10804

Description & Features

Technical Documents

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Key Document

Description

This reference design implements the UCC28630 PSR controller in a flyback power supply. The UCC28630 is capable of operating in both Continuous and Discontinuous Conduction Modes which enables high efficiency while reducing inductor size and cost. Safety standards such as EN60950 require that any X-capacitors in EMC filters on the AC side of the bridge rectifier quickly discharge to a safe level when AC is disconnected.  Typically, this requirement is achieved by including a resistive discharge element in parallel with the X-capacitor. However, this resistance causes a continuous power dissipation that impacts the standby power performance. In order to reduce standby power and eliminate the standing loss associated with the conventional discharge resistors, the UCC28630 device incorporates active X-capacitor discharge circuitry. In this design, less than 100mW no load power comsumption and over 88% converter efficiency is achieved.

Features
  • Utilize UCC28630 CCM/DCM PSR controller
  • Over 86% average efficiency
  • Optimized US line AC-DC power supply design
  • 24V/4A rated output
  • This circuit is tested and includes a test report

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Parametrics
 PMP10804.1
(Output Voltage 1)
Vin (Min) (V)100
Vin (Max) (V)138
Vout (Nom) (V)24
Iout (Max) (A)4
Output Power (W)96
Isolated/Non-IsolatedIsolated
Input TypeAC
TopologyFlyback- DCM

TI Devices (1)

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
UCC28630  High Power Flyback Controller with Primary-Side Regulation and Peak Power Mode  Offline and Isolated DC/DC Controllers and Converters  Sample & Buy View Design Kits & Evaluation Modules

Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date Views TI Recommends
PDF 1344 20 Oct 2015 45
Design files (3)
Title Abstract Type Size (KB) Date Views
PDF 166 13 Nov 2015 20
PDF 140 13 Nov 2015 25
PDF 176 13 Nov 2015 59


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