STEVAL-ISA204V1: 100W, 5V @ 20A, 42 ~ 56VDC


The STEVAL-ISA204V1 evaluation board is designed to demonstrate high efficiency DC-DC conversion, able to output 100 W (5 V/20 A) from 42 to 56 V DC input, which is especially suitable for telecom applications.

The power conversion stage is based on an active clamp forward topology managed by a PM8804 PWM controller featuring all the integrated circuitry necessary for a compact and efficient 48 V converter. The highly configurable controller includes a programmable oscillator for switching frequency regulation up to 1 Mhz, 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.

  • DC-DC forward converter based on PM8804

  • Input voltage range: 42 – 56 VDC

  • Switching frequency: 250 kHz

  • Voltage: 5 VDC

  • Current: up to 20 A

  • Peak efficiency > 94%

  • Open circuit protection


Manufacturer STMicroelectronics
Category AC/DC and DC/DC Conversion
Sub-Category DC/DC SMPS - Single Output
Eval Board Part Number 497-19565-ND
Eval Board Supplier STMicroelectronics
Eval Board Normally In Stock
Topology Step Down
Outputs and Type 1 Non-Isolated
Output Voltage: Factory Set 5 V
Current Out 20 A
Voltage In 42 ~ 56 V
Efficiency @ Conditions >94%, 48 VDC in @ 32 ~ 70W
>93%, 56 VDC in @ 27 ~ 90W
>92%, 42 VDC in @ 25 ~ 100W
Voltage Out Range - Fixed
Features Open Circuit Protection
Over Current Protection
Soft Start
Switching Frequency 250 kHz
Standby Current [Typical] 300 µA
Quiescent Current [Typical] 1.2 mA
Component Count + Extras 95 + 27
Internal Switch No
Design Author STMicroelectronics
Application / Target Market PoE, Power Over Ethernet
Standby Current [Maximum] 500 µA
Quiescent Current [Maximum] 1.5 mA
Main I.C. Base Part PM8804
Date Created By Author 2019-06
Date Added To Library 2019-10

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