5 V-Output, 4000-V Isolated Power Supply Reference Design for RS485 Applications PMP9801 (ACTIVE)

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Key Document

Description

This reference design showcases a 5-V output, 4000-V isolated Flyback DC/DC converter for RS485 applications. Using the boost converter TPS61046, the circuit supports wide input voltage range and up to 250mA output current with 78% efficiency from a 10-V input. The reference design uses an adaptive dummy load circuit to improve the load regulation of the primary side regulation solution for cost effective applications. It also introduces the secondary side regulation solution aiming at the high VOUT accuracy applications.

Features
  • 5V to 20V Input Voltage Range
  • 5V Output Voltage with up to 250-mA Output Current
  • Primary Side Regulation to Reduce Cost
  • Excellent Load Regulation due to Secondary Side Regulation

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Schematic/Block Diagram

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Design Files

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Parametrics
 PMP9801
(Output Voltage 1)
Vin (Min) (V)5
Vin (Max) (V)20
Vout (Nom) (V)5
Iout (Max) (A).25
Output Power (W)1.25
Isolated/Non-IsolatedIsolated
Input TypeDC
TopologyFlyback- Non Sync
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Part Number Status Vin  (Min)  (V)   Vin  (Max)  (V)   Vout  (Nom)  (V)   Iout  (Max)  (A)   Output Power  (W)   Isolated/Non-Isolated   Input Type   Topology  

PMP9801:
5 V-Output, 4000-V Isolated Power Supply Reference Design for RS485 Applications

ACTIVE 5   20   5   .25   1.25   Isolated   DC   Flyback- Non Sync  

TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
TLV61046A  28-V Output Voltage Boost Converter with Power Diode and Isolation Switch  Step-up (boost)  Sample & Buy View Design Kits & Evaluation Modules
TPS61046  28-V Output Voltage Boost Converter in WCSP Package  Step-up (boost)  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
TLV61046A Download -
TPS61046 Download -

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 1693 21 Jun 2016
Design files (5)
Title Type Size (KB) Date
ZIP 192 26 Sep 2016
ZIP 351 26 Sep 2016
PDF 338 26 Sep 2016
PDF 37 26 Sep 2016
PDF 148 26 Sep 2016

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