STMicroelectronics STEVAL-ISA203V1 Evaluation Board

STMicroelectronics STEVAL-ISA203V1 Evaluation Board is designed to demonstrate high-efficiency DC-DC conversion with 60W output (12V/5A), from 42 to 56VDC input (48V nom.). The STEVAL-ISA203V1 Board offers parameters which are especially suitable for telecom applications.

The PM8804 controller features all the integrated circuitry necessary for a compact and efficient 48V converter. The PM8804 manages the flyback topology that the power conversion is based on. The highly configurable controller includes a programmable oscillator for switching frequency regulation up to 1Mhz, adjustable slope compensation, dual complementary low-side drivers with programmable dead time, programmable soft start, soft turn off, and a programmable current sense blanking time.

The secondary side employs the SRK1000 adaptive synchronous rectification controller for flyback converters. The SRK1000 flyback synchronous rectification controller takes body diode sensing feedback from the STL130N8F7 secondary MOSFET.

The STEVAL-ISA203V1 Evaluation Board provides a compact and efficient continuous conduction mode flyback converter design especially suitable for server and telecommunications equipment.


  • DC-DC flyback converter based on-
    • PM8804 PWM peak current mode controller
    • SRK1000 adaptive synchronous rectification controller
  • Input voltage range of 42–56VDC
  • Switching frequency of 200kHz
  • RoHS compliant
  • Output:
    • 60W Power
    • 12VDC Voltage
    • 5A Current
  • Peak efficiency >92%


  • Server
  • Telecom

Block Diagram

Block Diagram - STMicroelectronics STEVAL-ISA203V1 Evaluation Board


STMicroelectronics STEVAL-ISA203V1 Evaluation Board
Published: 2020-02-27 | Updated: 2022-03-10