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In this paper, the short-circuit robustness of a normally off GaN HEMT is investigated in relation to applied bias conditions and pulse duration. The results align with previous studies on normally-on devices in highlighting an electrical type of failure. Here, however, the relevance of the specific gate-drive circuit design and corresponding device operational condtions is demonstrated. A gate-bias dependence (GBD) of the failure, correlated to the applied drain-source voltage, is introduced as a novel specific feature for the p-Gate type device.

A study of electrical and thermal failure modes of 600 V p-doped GaN HEMTs is presented, which focuses on the investigation of short-circuit limitations. The electrical failure mode seems to be an electrical field breakdown in the structure which is caused by excessive carrier concentration, rather than primary thermal generated. Accordingly, a thermal failure mode is observed, which features a distinctive behaviour and seems to be similar to schottky-gate HEMTs. Concerning the electrical failure mode, a specific p-gate HEMT short-circuit safe operating area (SCSOA) is presented as a novelty. However, a short-circuit capability of up to 520 V can be achieved, regarding the design of the gate-drive circuit.

In this paper, the short-circuit robustness of a normally off GaN HEMT is investigated in relation to applied bias conditions and pulse duration. The results align with previous studies on normally-on devices in highlighting an electrical type of failure. Here, however, the relevance of the specific gate-drive circuit design and corresponding device operational condtions is demonstrated. A gate-bias dependence (GBD) of the failure, correlated to the applied drain-source voltage, is introduced as a novel specific feature for the p-Gate type device.

In this paper, the short-circuit robustness of a normally off GaN HEMT is investigated in relation to applied bias conditions and pulse duration. The results align with previous studies on normally-on devices in highlighting an electrical type of failure. Here, however, the relevance of the specific gate-drive circuit design and corresponding device operational condtions is demonstrated. A gate-bias dependence (GBD) of the failure, correlated to the applied drain-source voltage, is introduced as a novel specific feature for the p-Gate type device.

In this paper, the short-circuit robustness of a normally off GaN HEMT is investigated in relation to applied bias conditions and pulse duration. The results align with previous studies on normally-on devices in highlighting an electrical type of failure. Here, however, the relevance of the specific gate-drive circuit design and corresponding device operational condtions is demonstrated. A gate-bias dependence (GBD) of the failure, correlated to the applied drain-source voltage, is introduced as a novel specific feature for the p-Gate type device.

In this paper, the short-circuit robustness of a normally off GaN HEMT is investigated in relation to applied bias conditions and pulse duration. The results align with previous studies on normally-on devices in highlighting an electrical type of failure. Here, however, the relevance of the specific gate-drive circuit design and corresponding device operational condtions is demonstrated. A gate-bias dependence (GBD) of the failure, correlated to the applied drain-source voltage, is introduced as a novel specific feature for the p-Gate type device.