Valley Switching Flyback with 85 to 265VAC Input (48V @ 0.625A) Reference Design PMP12027 (ACTIVE)

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Key Document

Description

The PMP12027 reference design uses the UCC28740 flyback controller to generate a 48V/625mA output from a universal AC input.  The valley switching of the UCC28740 allows this design to achieve a maximum load efficiency over 90%; no load losses are less than 100mW. The constant current regulation mode of the UCC28740 provides accurate current limiting.

Features
  • Over 90% average 4 point efficiency
  • Standby (no load) power consumption is less than 100mW
  • Conducted emissions are below Class B levels
  • Accurate current limiting

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Schematic/Block Diagram

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Design Files

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Parametrics
 PMP12027.1
(Output Voltage 1)
Vin (Min) (V)85
Vin (Max) (V)265
Vout (Nom) (V)48
Iout (Max) (A).625
Output Power (W)30
Isolated/Non-IsolatedIsolated
Input TypeAC
TopologyFlyback

TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
TL431  Adjustable precision shunt regulator  Voltage references  Sample & Buy Not Available
UCC28740  Constant-Voltage, Constant-Current Flyback Controller Using Opto-Coupler Feedback  Offline & isolated DC/DC controllers & converters  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
TL431 Download Download
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Download -
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UCC28740 Download Download

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 2223 28 Mar 2016
Design files (3)
Title Type Size (KB) Date
PDF 132 28 Mar 2016
PDF 74 21 Mar 2016
PDF 103 21 Mar 2016

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