PMP7174 Reference Design

Texas Instruments

24V/1.45A AC/DC Flyback PSU Optimized for Low AC Line Input Reference Design

Description

This design is a compact: low AC line input (Maximum 130Vac) Flyback converter which provides a regulated and fully-isolated 24V@1.45A output. Featuring TI's LM5021 current mode controller working at 135kHz: the converter features fast start-up and delivers greater than 85% efficiency from 30-100% load. The overall solution is very compact at 2312sq.mm. footprint area.

Features
  • Delivers 35W output power at efficiency of 85.3% @ 85VAC: 86.6% @ 130VAC24V output compatible with standard industrial applications: less than 0.5% line/load regulation from no-load to full-load4kV galvanic isolation between input and output108mVpp ripple on output at 35W full-load conditionPasses conducted EMI emissions in compliance with EN55022Ideal for Bias power supplies needed in industrial electronic equipment for building infrastructure: home automation etc.
Applications
  • Smoke & heat detector
  • HVAC controller
  • Gas detector
  • Intrusion control panel
  • Elevator main control panel
Product Categories
  • Power management

Parts

Part Number Name Companion Part
LM5021 LM5021 Buy Datasheet
OPA170 OPA170 Buy Datasheet
TLV431 TLV431 Buy Datasheet

Bill Of Materials

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Schematic

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Design File

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Test Data

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Other Documents

Title Updated Type Size (KB)
PMP7174 CAD Files 30 Oct 2014 ZIP 73
PMP7174 BOM 30 Oct 2014 PDF 25
PMP7174 Schematic 30 Oct 2014 PDF 104