Fly-Buck Bias Solution for MCU and RS-485 PMP9474 (ACTIVE)

Description & Features

Technical Documents

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Description

The PMP9474 reference design is Fly-Buck solution, with two outputs, one non-isolated power supply, 3.3V@300mA, for MCU, one isolated power supply, 5V@100mA, for RS-485. The most important feature of this design is ultra compact solution size, which is only 26mmx14.5mm. The design uses the LM5017 synchronous buck converter configured as a Fly-Buck regulator. With the benefit of primary side regulation, the supply has the output regulated without the opto-coupler or additional transformer winding. The LM5017 has a wide Vin range which is up to 100V and 600mA output current capability with integrated switch FETs. The input voltage to the reference board can be loosely regulated with a range of 18V to 36V.

Features
  • One non-isolated 3.3V output, one isolated 5V output;
  • Fly-Buck converter design;
  • Ultra compact size, only 26mm x 14.5mm;
  • 83% peak efficiency.
  • LM5017 sync buck regulator, up to 100V wide Vin range, 600mA capability
  • This circuit board is tested, and the design files and test report are included.

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Schematic/Block Diagram

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Test Data

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Design Files

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Part Number Status

PMP9474:
Fly-Buck Bias Solution for MCU and RS-485

ACTIVE

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
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

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User guides (1)
Title Type Size (KB) Date
PDF 985 02 Mar 2015
Design files (3)
Title Type Size (KB) Date
ZIP 84 02 Mar 2015
PDF 27 02 Mar 2015
PDF 111 02 Mar 2015

Support & training

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