Flybuck For 48Vin Isolated System Aux. Power Reference Design
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Key Document


The PMP40042 is a D-CAP Aux. isolated power supply reference design solution for the Telecom & Server applications. High integration and low switching loss, with the UVLO, OTP, OCP, SS and Prebias Start-up, the module enables a high efficiency for 48V system application.  A low cost & compact transformer is embedded on the board. The board size is very compact (31mm * 11.9mm * 5mm). 

  • Integrated high-side and low-side MOSFETs
  • Fast transient response based on the COT controlling
  • Integrated the UVLO, OTP, OCP, SS and prebias start-up
  • Wide input voltage range 36V ~ 60V
  • Compact size:  31mm * 11.9mm * 5mm

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(Output Voltage 1)
Vin (Min) (V)36
Vin (Max) (V)60
Vout (Nom) (V)1
Iout (Max) (A)40
Output Power (W)40
Input TypeDC
TopologyHalf Bridge- Hard Switched

TI Devices (1)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LM5161  Wide Input 4.5-V to 100-V, 1-A Synchronous Buck / Fly-Buck Converter  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)
LM5161 Download Download

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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 918 10 Nov 2016
Design files (6)
Title Type Size (KB) Date
ZIP 248 10 Nov 2016
ZIP 28 10 Nov 2016
PDF 594 10 Nov 2016
PDF 96 10 Nov 2016
PDF 46 10 Nov 2016
PDF 150 10 Nov 2016
Related Tools & Software

Reference Designs (2)

Name Part Number Tool Type
48Vin, 300W 1/8brick Digital Module with GaN FET Reference Design  PMP4435  Reference design 
LMG5200 48V to 1V/40A Single Stage Converter Reference Design  PMP4497  Reference design 

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