EVLMG1-250WLLC: 24V @ 10.4A, 360 ~ 440VDC In


This demonstration board is a resonant LLC converter dedicated to any kind of industrial application where minimum size and high efficiency is required, based on MasterGaN1. This device, embedding a couple of GaN power transistors and a driver in the same package, allows to interface directly any kind of SMPS controller. Thanks to the GaN technology and to embedded driver, the converter can be designed with an operating frequency higher than using conventional MOSFETs. Actually, the board has no heatsinks on the primary side and has very reduced dimensions; the power density is 20 W/inch^3. The high efficiency and small size make the board suitable also when available space is limited.

Output power can be up to 250 W at 24 Vdc. Converters come with overcurrent, short-circuit and overvoltage protection. The input voltage monitoring allows the startup with correct sequencing of cascade converters, preventing operation with too low input voltage.

The board is composed of a motherboard with the transformer and the primary controller, and two small daughterboards: one at primary side embeds the MasterGaN1, another on secondary side has the SR controller SRK2001 and the MOSFETs.


Manufacturer STMicroelectronics
Category AC/DC and DC/DC Conversion
Sub-Category DC/DC SMPS - Single Output
Eval Board Part Number 497-EVLMG1-250WLLC-ND
Eval Board Supplier STMicroelectronics
Eval Board Normally In Stock
Topology Step Down
Outputs and Type 1 Isolated
Voltage Out: Factory Set 24 V
Current Out 10.4 A
Voltage In 360 ~ 440 VDC
Efficiency @ Conditions >94%, 400V in, 24V @ 45%~100% Load (4.7 ~ 10.4 A)
Voltage Out Range - Fixed
Features Over Current Protection
Over Voltage Protection
Short Circuit Protection
Under Voltage Protection, Brown-Out
Switching Frequency 260 kHz
Standby Current [Typical] - Not Given
Quiescent Current [Typical] 1.2 mA
Component Count + Extras 120 + 8
Internal Switch No
Design Author STMicroelectronics
Application / Target Market Power: Auxiliary Power Supply
Power: Industrial Power
Standby Current [Maximum] - Not Given
Quiescent Current [Maximum] 1.25 mA
Main I.C. Base Part L6599A
Date Created By Author 2021-02
Date Added To Library 2021-10

Eval Board

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