Primary-Side Regulated Flyback Converter for Electric Vehicle Battery Monitoring Reference Design
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Key Document


PMP20583 is a primary-side regulated flyback reference design which provides a ground referenced 5V output and an isolated 5V output at up to 80mA each from an input voltage of 37V to 125V. This design uses the UCC28700-Q1 flyback controller for constant voltage and constant current control of the output. Variable frequency operation minimizes standby power at no load. Features include quasi-resonant valley switching for highest efficiency and frequency dithering to improve EMI performance.

  • Primary-side regulation
  • Constant-voltage and constant-current operation
  • Less than 10mW no load power
  • Frequency dithering
  • One isolated and one ground referenced output

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(Output Voltage 1)
(Output Voltage 2)
Vin (Min) (V)3737
Vin (Max) (V)125125
Vout (Nom) (V)55
Iout (Max) (A).08.08
Output Power (W).4.4
Input TypeDCDC
TopologyFlyback- DCMFlyback- DCM

TI Devices (1)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
UCC28700-Q1  Compact primary-side regulation PWM controller with automotive grade  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)
UCC28700-Q1 Download Download

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User guides (1)
Title Type Size (KB) Date
PDF 1639 08 Dec 2017
Design files (6)
Title Type Size (KB) Date
ZIP 219 08 Dec 2017
ZIP 344 08 Dec 2017
PDF 328 08 Dec 2017
PDF 72 08 Dec 2017
PDF 29 08 Dec 2017
PDF 95 08 Dec 2017

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