The EVAL-ADuM4122WHB1Z is a half bridge gate drive board that allows simple evaluation of the performance of the ADuM4122 when driving advanced Wolfspeed silicon carbide (SiC) metal-oxide semiconductor field-effect transistors (MOSFETs) and power modules. The EVAL-ADuM4122WHB1Z is intended to be used with the Wolfspeed SpeedVal Kit Modular Evaluation Platform and Wolfspeed clamped inductive load (CIL) test boards or half bridge evaluation boards and differential transceiver boards.

The EVAL-ADuM4122WHB1Z has an isolated return channel that is configured to read a negative temperature coefficient (NTC) thermistor and provides a variable frequency output corresponding to the resistance and temperature of the NTC.

The control and input interface for the EVAL-ADuM4122WHB1Z uses RS-422 signaling for improved noise and disturbance immunity, and the interface includes a 12 V power input for the EVAL-ADuM4122WHB1Z.

For full details on the ADuM4122, see the ADuM4122 data sheet, which must be consulted when using the EVAL-ADuM4122WHB1Z.

The EVAL-ADuM4122EBZ evaluation board supports the ADuM4122 isolated gate driver with slew rate control. iCoupler^® technology provides isolation between the ADuM4122 input signal and the output gate driver. The evaluation board supplies jumpers and screw terminals to configure different drive conditions. The EVAL-ADuM4122EBZ board operates with square waves and dc values on the V_IN+ and SRC pins.

The ADuM4122 is operational with voltages of up to 35 V. Logic level voltages at the V_IN+ pin control the V_OUT output. The SRC pin controls whether the V_{OUT_SRC} pin is either set to high-Z or follows the logic of the user supplied pulse-width modulation (PWM) input at V_IN+. When the external series gate resistors combine the outputs from the V_OUT and V_{OUT_SRC} pins, one isolated gate driver is then able to have two easily selectable slew rates.

The EVAL-ADuM4122EBZ board tests the propagation delay, drive strength, slew rate selection, and input logic of the device.

Refer to the ADuM4122 data sheet for complete information about the ADuM4122, and consult the data sheet in conjunction with this user guide when using the evaluation board.