STMicroelectronics has extended its MasterGaN range to 200W
The MasterGaN4 power package integrate two symmetrical 650V gallium nitride (GaN) power transistors with 225mΩ RDS(on), alongside optimized gate drivers and circuit protection to simplify the design of high-efficiency power-conversion applications up to 200W.
The MasterGaN4 simplifies design using wide-bandgap GaN power semiconductors by taking away the complex gate-control and circuit-layout challenges. With inputs tolerant of voltages from 3.3V to 15V, the MasterGaN4 can be controlled by connecting the packages directly to Hall-effect sensors or a CMOS device such as a microcontroller, DSP, or FPGA.
The higher operating frequencies enabled by the superior switching performance of GaN transistors and the increased efficiency that reduces thermal dissipation means power supply designers can choose small magnetic components and heatsinks to build more compact and lightweight power supplies, chargers, and adapters.
The two 650V GaN switches in the MasterGaN4 are suitable for symmetrical half-bridge topologies as well as soft-switching topologies such as active clamp flyback and active clamp forward.
The wide supply-voltage range from 4.75V to 9.5V allows convenient connection to an existing power rail. Built-in protection further simplifies design, including gate-driver interlocks, low-side and high-side under-voltage lockout (UVLO), and over-temperature protection. There is also a dedicated shutdown pin.
ST has introduced a dedicated prototype board (EVALMASTERGAN4) that provides a complete set of features to drive the MasterGaN4 with a single or complementary driving signal. An adjustable deadtime generator is also provided. The board gives users the flexibility to apply a separate input signal or PWM signal, insert an external bootstrap diode, separate the logic and gate-driver supply rails, and to use a low-side shunt resistor for peak-current-mode topologies.
The MasterGaN4 SIP is in production now in a 9mm x 9mm x 1mm GQFN package that has over 2mm creepage distance for safe use in high-voltage applications. Pricing starts at $5.99 for orders of 1000 pieces. The EVALMASTERGAN4 board is $87.00.
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