STMicroelectronics EVLMG1LPBRDR1

Overview

EVLMG1LPBRDR1 from STMicroelectronics is a GaN-based half-bridge evaluation board built around the MASTERGAN1L 600 V half-bridge enhancement-mode GaN HEMT with integrated high-voltage driver, designed for resonant LLC, active clamp flyback, and synchronous inverse buck topologies. It delivers fast wake-up time (<100 ns), supports up to 520 V input, features adjustable dead-time via RC filters on LIN/HIN, and includes discrete bootstrap diode (STTH1R06A) and capacitor (47 nF) for high-frequency operation.

For engineers reviewing the EVLMG1LPBRDR1 datasheet, EVLMG1LPBRDR1 pinout, EVLMG1LPBRDR1 application, or EVLMG1LPBRDR1 equivalent, this module enables rapid prototyping of high-efficiency GaN power stages without full PCB redesign-especially where thermal resistance (45 °C/W), peak current mode sensing, and external body diode integration are critical selection criteria.

Technical Context

The board implements MASTERGAN1L in a configurable half-bridge layout with independent LIN/HIN inputs, SD/OD enable/disable control, and SENSE-based peak current mode feedback. Its dual 6 V regulator options (TL432AIL3T-based precision vs. low-cost NPN alternative) allow flexible VCC/PVCC/booster supply tuning for varying accuracy and cost targets.

Thermal design centers on a 30 × 40 mm FR-4 PCB achieving R_th(J-A) = 45 °C/W without forced airflow. External body diodes (STTH1R06A ×2) and zero-ohm sense resistors (R17–R20) are pre-configured for LLC; removal and resistor re-sizing enable flyback or inverse buck modes-validated in AN5644, AN5865, and AN5917.

Key Specifications

Availability

EVLMG1LPBRDR1 is available at Aetrix Electronics and suitable for LLC resonant converters, active clamp flyback power supplies, synchronous inverse buck LED drivers, and GaN-based industrial DC/DC modules requiring stable component supply and rapid topology validation.

Supply support for EVLMG1LPBRDR1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader specializing in power management, analog, microcontrollers, and automotive ICs-with over 40 years of innovation in energy-efficient power solutions.

This board belongs to ST's MASTERGAN evaluation platform family, engineered specifically to accelerate development of high-density, high-efficiency GaN-based AC/DC and DC/DC converters targeting industrial, server, and LED lighting applications.

FAQ

What topologies does EVLMG1LPBRDR1 support out-of-the-box?

EVLMG1LPBRDR1 is pre-configured for LLC resonant converters with zero-ohm sense resistors and parallel STTH1R06A body diodes. It also supports active clamp flyback and synchronous inverse buck by removing the diodes and installing appropriate sense resistors-verified in ST application notes AN5644 and AN5865.

How is dead time controlled on this board?

Dead time between LIN and HIN signals is adjusted using external RC filters (R11/C16 and R12/C15), allowing precise modulation of propagation delay to prevent shoot-through in high-frequency GaN switching-no firmware or controller-level timing adjustment required.

What is the purpose of the SD/OD pin?

SD/OD (pin 9) provides hardware-level enable/disable control for MASTERGAN1L outputs, independent of LIN/HIN logic states. It is pull-up to VCC and supports protection schemes like overcurrent shutdown or burst-mode sequencing without altering gate drive timing.

Can EVLMG1LPBRDR1 operate without an external motherboard supply?

No-the board requires an external auxiliary supply connected to VAUX_REG (pin 14) to power the on-board 6 V regulator. It lacks an integrated AC/DC or isolated DC/DC converter and relies on the host system for primary power and control signal routing.