Three-Phase AC and DC Input to 24V at 125mA Quick-Startup Isolated Flyback Reference Design

(ACTIVE) PMP10195

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Key Document

Description

This design supplies an isolated 24V at 125mA from three-phase AC mains and DC input voltage. Since a maximum 70-ms startup time is necessary and the maximum input voltage is 1260 Vdc, a low-loss startup network has been developed. In order to reduce the stress on the FET, a cascode configuration has been selected. The controller features constant switching frequency and low quiescent current. A small form factor makes it suitable for electronic breaker supply.

Features
  • LM5020-based isolated flyback in constant switching frequency delivering 24V at 125mA
  • 80% peak efficiency at full load and 325Vdc input voltage
  • Extremely wide input voltage range: 56Vac to 891Vac
  • Less than 70-ms startup time
  • Magnetic feedback: no optocoupler is needed

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Bill of Materials (BOM)

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Parametrics
 PMP10195.1
(Output Voltage 1)
Vin (Min) (V)56
Vin (Max) (V)892
Vout (Nom) (V)24
Iout (Max) (A).125
Output Power (W)3
Isolated/Non-IsolatedIsolated
Input TypeAC
TopologyFlyback- Non Sync

TI Devices (1)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LM5020  13-100V Wide Vin, Current Mode PWM Boost, Flyback, Sepic Controller  Step-up (boost)  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LM5020 Download Download
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Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date Views TI Recommends
PDF 1096 20 Apr 2016 5
Design files (6)
Title Abstract Type Size (KB) Date Views
ZIP 42 20 Apr 2016 0
ZIP 455 20 Apr 2016 0
PDF 1101 20 Apr 2016 1 1
PDF 42 20 Apr 2016 0
PDF 118 20 Apr 2016 2
PDF 418 20 Apr 2016 8

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