50-W flyback with over current limit function space reference design TIDA-070002 (ACTIVE)

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Key Document

Description

The 50-W flyback with over current limit function space reference design uses the UC1843A-SP, INA901-SP, LM139AQML-SP, and UC1901-SP to create an isolated feedback flyback with current sensing and over current flags.

The UC1843A-SP is used to switch the low side MOSFET of the flyback converter and provide voltage and current to the output. The UC1901-SP senses the output voltage and completes the loop for the isolated feedback. The INA901-SP senses the input current which is provided to the LM139AQML-SP to create an over current flag.

Features
  • Isolated magnetic feedback using UC1901-SP
  • Current sensing using INA901-SP
  • Over current comparison using LM139AQML-SP
  • Double pulse suppression
  • Multiple feedback paths supported

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Schematic/Block Diagram

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Parametrics
 TIDA-070002.1
(Output Voltage 1)
Vin (Min) (V)20
Vin (Max) (V)40
Vout (Nom) (V)5
Iout (Max) (A)10
Output Power (W)50
Isolated/Non-IsolatedIsolated
Input TypeDC
TopologyFlyback- CCM

TI Devices (5)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
INA901-SP  Radiation hardened, -15V to 80V common mode, unidirectional current-shunt monitor  Current sense amplifiers  View Design Kits & Evaluation Modules
LM139AQML-SP  Low Power Low Offset Voltage Quad Comparator  Amplifiers  View Design Kits & Evaluation Modules
UC1843A-SP  Current Mode PWM Controller  Offline & isolated DC/DC controllers & converters  View Design Kits & Evaluation Modules
UC1843B-SP  Class V, radiation hardened current-mode PWM controller  Offline & isolated DC/DC controllers & converters  View Design Kits & Evaluation Modules
UC1901-SP  Isolated Feedback Generator  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)
LM139AQML-SP Download
Download Download
Download
UC1843A-SP Download -
Download -
UC1901-SP Download Download

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 16276 06 Mar 2019
Design files (6)
Title Type Size (KB) Date
ZIP 930 21 Dec 2018
ZIP 603 21 Dec 2018
PDF 1389 21 Dec 2018
PDF 285 21 Dec 2018
PDF 107 21 Dec 2018
PDF 339 21 Dec 2018

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