GS665MB-EVB Gan Systems

Visit www.gansystems.com for the latest version of this users guide. This evaluation kit is designed for engineering evaluation in a controlled lab environment and should be handled by qualified personnel ONLY. High voltage will be exposed on the board during the test and even brief contact during operation may result in severe injury or death. Never leave the board operating unattended. After it is de-energized, always wait until all capacitors are discharged before touching the board. This product contains parts that are susceptible to damage by electrostatic discharge (ESD). Always follow ESD prevention procedures when handling the product. The GS665XXX-EVBDB daughter board style evaluation kit consists of two GaN Systems 650V GaN Enhancement-mode HEMTs (E-HEMTs) and all necessary circuits including half bridge gate drivers, isolated power supplies and optional heatsink to form a functional half bridge power stage. It allows users to easily evaluate the GaN E-HEMT performance in any half bridge-based topology, either with the universal mother board (P/N: GS665MB-EVB) or users own system design. Serves as a reference design and evaluation tool as well as deployment-ready solution for easy in- system evaluation. Vertical mount style with height of 35mm, which fits in majority of 1U design and allows evaluation of GaN E-HEMT in traditional through-hole type power supply board. Current shunt position for switching characterization testing Universal form factor and footprint for all products The daughter board and universal mother board ordering part numbers are below: Part Number GaN E-HEMT P/N: Description GS66502B-EVBDB GS66502B GaN E-HEMT 650V/7.5A, 200m GS66504B-EVBDB GS66504B GaN E-HEMT 650V/15A, 100m GS66508B-EVBDB GS66508B GaN E-HEMT 650V/30A, 50m GS66508T-EVBDB GS66508T GaN E-HEMT top side cooled 650V/30A, 50m GS66516T-EVBDB GS66516T GaN E-HEMT top side cooled 650V/60A, 25m GS665MB-EVB Universal 650V Mother Board The daughter board GS665XXX-EVBDB circuit diagram is shown in Figure 1. The control logic inputs on 2x3 pin header J1 are listed below: Pin Descriptipon ENA Enable input. It is internally pulled up to VCC, a low logic disables all the PWM gate drive outputs. VCC +5V auxillary power supply input for logic circuit and gate driver. On the daughter board there are 2 isolated 5V to 9V DC/DC power supplies for top and bottom switches. VDRV Optional 9V gate drive power input. This pin allows users to supply separate gate drive power supply. By default VDRV is connected to VCC on the daughter board via a 0 ohm jumper FB1. If bootstrap mode is used for high side gate drive, connect VDRV to 9V PWMH High side PWM logic input for top switch Q1. It is compatible wth 3.3V and 5V PWML Low side PWM logic input for bottom switch Q2. It is compatible wth 3.3V and 5V 0V Logic inputs and gate drive power supply ground return.