STMicroelectronics EVALMASTERGAN1

Overview

EVALMASTERGAN1 from STMicroelectronics is a half-bridge demonstration board built around the MASTERGAN1 integrated high-voltage GaN driver, supporting 600 V operation and featuring on-board deadtime generation, 3.3 V linear regulation (50 mA), and high-bandwidth GH/GL monitoring via MMCX connectors for evaluating GaN-based resonant topologies in high-density power conversion.

For engineers reviewing the EVALMASTERGAN1 datasheet, EVALMASTERGAN1 pinout, EVALMASTERGAN1 application, or EVALMASTERGAN1 equivalent, this board enables rapid validation of MASTERGAN1's dual-gate drive behavior, programmable deadtime response, thermal performance (35°C/W R_th(J-A)), and flexible signal routing-critical for LLC, active clamp flyback, and totem-pole PFC design prototyping.

Technical Context

The board implements a complete evaluation environment for MASTERGAN1, integrating a single-input PWM-to-complementary-HIN/LIN converter using discrete 74LVC1G17W5 buffers and a 74LVC1G14W5 inverter, with independently adjustable deadtimes set via onboard trimmers (TR1/TR2). It supports both direct MCU/DSP input and on-board signal generation modes via jumper-selectable routing (R4/R7).

Power delivery includes a dedicated 4.5–6 V VCC supply path, an embedded KF33BD-TR 3.3 V LDO for logic circuitry, and high-voltage interfaces rated for 520 V bus operation. Thermal design uses FR-4 PCB (56 × 70 mm) achieving 35°C/W junction-to-ambient without forced airflow, enabling realistic large-signal switching loss assessment.

Key Specifications

Availability

EVALMASTERGAN1 is available at Aetrix Electronics and suitable for high-frequency resonant converters, totem-pole PFC designs, and GaN-based server/industrial SMPS requiring stable component supply and fast-turn prototyping capability.

Supply support for EVALMASTERGAN1 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, microcontrollers, and analog/mixed-signal ICs, with deep expertise in wide-bandgap technology and high-efficiency power systems.

EVALMASTERGAN1 belongs to ST's MASTERGAN evaluation platform family, designed specifically to accelerate development of compact, high-efficiency GaN-based AC-DC and DC-DC converters targeting data center, telecom, and industrial power applications.

FAQ

What is the recommended power sequencing for EVALMASTERGAN1?

Apply VCC (4.5–6 V) first, then the HV bus voltage. For shutdown, turn off the HV bus before removing VCC. This sequence prevents latch-up or overvoltage stress on MASTERGAN1's internal level shifters and bootstrap circuitry, ensuring reliable startup and protection during transient conditions.

Can EVALMASTERGAN1 be used with external gate drivers or controllers?

Yes - J3 and J4 provide direct access to MASTERGAN1's LIN and HIN pins, allowing connection to external MCUs, DSPs, or PWM controllers. The board supports both 3.3 V and 5 V logic levels, and jumpers R4/R7 configure signal routing to bypass the on-board deadtime generator when needed.

Does EVALMASTERGAN1 support peak current mode control?

Yes - it includes a spare footprint (R15) for a low-side shunt resistor and dedicated SENSE pin access (J6), enabling implementation of peak current mode control in LLC or active clamp topologies. The MASTERGAN1 device integrates sensing comparators compatible with this configuration.

What is the purpose of the MMCX connectors CN1 and CN2?

CN1 and CN2 provide ultra-low-inductance, high-bandwidth access to MASTERGAN1's GH and GL gate drive outputs. They are intended for use with high-voltage differential probes (optically isolated preferred) to accurately capture fast GaN switching waveforms without distortion or ground loop interference.