PMP7798

Low-Power Isolated Supply, Input range: 36V to 75V, Output: 10V @ 120mA, LM5017

PMP7798

Design files

Overview

Based on the Wide VIN COT Sync Buck regulator LM5017, this FlyBuck circuit provides excellent regulation for two isolated outputs and one non-isolated output. Compared with a conventional Flyback circuit, this design features a smaller board size and minimized BOM without the need for an optocoupler. This design is well suited for applications which need bias power. Additional output voltage versions of this board are available: see PMP7798.2 and PMP7798.3

Features
  • 36V to 75V Input
  • Primary side output: 10V output at 40mA
  • Secondary side output 1: 5V output at 80mA
  • Secondary side output 2: 10V output at 120mA
  • This fully-functional evaluation board is supported with design files, a demo, and an application note

Output voltage options PMP7798.1 PMP7798.2 PMP7798.3
Vin (Min) (V) 36 36 36
Vin (Max) (V) 75 75 75
Vout (Nom) (V) 10 5 10
Iout (Max) (A) .04 .08 .12
Output Power (W) .4 .4 1.2
Isolated/Non-Isolated Isolated Isolated Isolated
Input Type DC DC DC
Topology Buck- Synchronous FlyBuck FlyBuck

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.

SNVU119.PDF (260 K)

Test results for the reference design, including efficiency graphs, test prerequisites and more

SNVR061.PDF (45 K)

Detailed schematic diagram for design layout and components

SNVR062.PDF (34 K)

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

SNVU120.PDF (53 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

Isolated DC/DC converters & modules

LM250177.5-48V Wide Vin, 650mA Constant On-Time Synchronous Buck Regulator

Data sheet document-pdfAcrobat PDF
Isolated DC/DC converters & modules

LM250187.5-48V Wide Vin, 300mA Constant On-Time Synchronous Buck Regulator

Data sheet document-pdfAcrobat PDF open-in-new HTML
Isolated DC/DC converters & modules

LM250197.5-48V Wide Vin, 100mA Constant On-Time Synchronous Buck Regulator

Data sheet document-pdfAcrobat PDF open-in-new HTML
Isolated DC/DC converters & modules

LM349257.5-100V Wide Vin, 100mA Integrated Secondary Bias Regulator for Isolated DC/DC Converters

Data sheet document-pdfAcrobat PDF open-in-new HTML
Isolated DC/DC converters & modules

LM349267.5-100V Wide Vin, 300mA Integrated Secondary Bias Regulator for Isolated DC/DC Converters

Data sheet document-pdfAcrobat PDF open-in-new HTML
Isolated DC/DC converters & modules

LM349277.5-100V Wide Vin, 600mA Integrated Secondary Bias Regulator for Isolated DC/DC Converters

Data sheet document-pdfAcrobat PDF open-in-new HTML
Isolated DC/DC converters & modules

LM50177.5-100V Wide Vin, 600mA Constant On-Time Synchronous Buck Regulator

Data sheet document-pdfAcrobat PDF open-in-new HTML
Isolated DC/DC converters & modules

LM50187.5-100V Wide Vin, 300mA Constant On-Time Synchronous Buck Regulator

Data sheet document-pdfAcrobat PDF open-in-new HTML
Isolated DC/DC converters & modules

LM50197.5-100V Wide Vin, 100mA Constant On-Time Synchronous Buck Regulator

Data sheet document-pdfAcrobat PDF open-in-new HTML

Technical documentation

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Type Title Date
* Test report PMP7798 Test Results Feb. 06, 2012
White paper Designing isolated rails on the fly with Fly-Buck™ converters Sep. 29, 2015

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