LM5017 Flybuck Quad Isolated Output Power Supply without Opto-coupler
PMP7993
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Description

The LM5017 Flybuck reference design provides multiple isolated outputs to supply the bias voltage needed in a PLC I/O module. It generates 4 isolated outputs: ±15V@50mA and ±5V@100mA; it can cover most of the required voltage rails in the I/O module, such as the OP-AMP, DAC bias, RS-485 transmitter and digital isolator power supplies. In the Flybuck, the regulation is done on the primary side, and thus no opto-coupler is needed. The overall load/line regulation for each output is within +/-5%. The input voltage range is from 17V to 32V.

Features
  • Ideal for PLC I/O modules, or industrial applications requiring multiple bias supplies
  • Quad isolated outputs,  +/-15V@50mA, +/-5V@100mA
  • Designed for an operating range of 17-32V
    • Uses the LM5017 capable of 9 to 100V Input operation for withstanding transients and surge voltage
  • +/-5% Vout regulation accuracy across line and load variations
  • Tested and supported with design files, reference board available upon request


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Design Files

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Parametrics
 PMP7993.1
(Output Voltage 1)
PMP7993.2
(Output Voltage 2)
PMP7993.3
(Output Voltage 3)
PMP7993.4
(Output Voltage 4)
Vin (Min) (V)17171717
Vin (Max) (V)32323232
Vout (Nom) (V)15-155-5
Iout (Max) (A).05.05.1.1
Output Power (W).75.75.5.5
Isolated/Non-IsolatedIsolatedIsolatedIsolatedIsolated
Input TypeDCDCDCDC
TopologyFlybuckFlybuckFlybuckFlybuck

TI Devices (1)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LM5017  7.5-100V Wide Vin, 600mA Constant On-Time Synchronous Buck Regulator  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)
LM5017 Download Download
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Technical Documents

See the Important Notice and Disclaimer covering reference designs and other TI resources.

User guides (3)
Title Type Size (KB) Date
PDF 884 12 Sep 2013
PDF 884 12 Sep 2013
PDF 884 12 Sep 2013
White papers (1)
Title Type Size (KB) Date
PDF 980 29 Sep 2015
Design files (5)
Title Type Size (KB) Date
ZIP 163 14 Apr 2014
PDF 884 12 Sep 2013
PDF 205 12 Sep 2013
PDF 24 12 Sep 2013
PDF 121 12 Sep 2013
More literature (2)
Title Type Size (KB) Date
PDF 552 13 Mar 2015
PDF 783 21 Aug 2014

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