ECE 599 Characterization of WBG Devices

Homework 2 ― Switching performance analysis based on DPT simulation

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Objective: Understand the impact of parasitics on switching performance under different

operating conditions based on simulation provided as the benchmark. Use the simulation

provided as the benchmark and complete the following cases

1. Impact of gate loop inductance

1.1. Sweep gate loop inductance Lgs_L (0.1 nH, 5 nH, and 10 nH) under the operation

condition of 200 V dc bus voltage and 5 A load current

1.1.1. Plot simulation waveforms of a) lower gate-source voltage, b) lower drain-

source voltage, c) upper drain-source voltage, d) lower drain current, and e)

lower channel current

1.1.2. Summarize the switching data in the following table

Turn-on time (ns) Turn-off time (ns)

Peak dv/dt during turn-on Peak dv/dt during turn-off
(V/ns) (V/ns)
Upper drain-source voltage Lower drain-source voltage
spike during turn-on (V) spike during turn-off (V)
Turn-on energy loss based on Turn-off energy loss based on
drain current (µJ) drain current (µJ)
Turn-on energy loss based on Turn-off energy loss based on
channel current (µJ) channel current (µJ)
Total energy loss based on Total energy loss based on
drain current (µJ) channel current (µJ)

1.2. Sweep gate loop inductance Lgs_L (0.1 nH, 5 nH, and 10 nH) under the operation
 condition of 800 V dc bus voltage and 5 A load current

1.2.1. Plot simulation waveforms of a) lower gate-source voltage, b) lower drain-

source voltage, c) upper drain-source voltage, d) lower drain current, and e)

lower channel current

1.2.2. Summarize the switching data in the following table

Turn-on time (ns) Turn-off time (ns)

Peak dv/dt during turn-on Peak dv/dt during turn-off
(V/ns) (V/ns)
Upper drain-source voltage Lower drain-source voltage
spike during turn-on (V) spike during turn-off (V)
Turn-on energy loss based on Turn-off energy loss based on
drain current (µJ) drain current (µJ)
Turn-on energy loss based on Turn-off energy loss based on
channel current (µJ) channel current (µJ)
Total energy loss based on Total energy loss based on
drain current (µJ) channel current (µJ)

1.3. Sweep gate loop inductance Lgs_L (0.1 nH, 5 nH, and 10 nH) under the operation

condition of 200 V dc bus voltage and 30 A load current

1.3.1. Plot simulation waveforms of a) lower gate-source voltage, b) lower drain-

source voltage, c) upper drain-source voltage, d) lower drain current, and e)

lower channel current

1.3.2. Summarize the switching data in the following table

Turn-on time (ns) Turn-off time (ns)

Peak dv/dt during turn-on Peak dv/dt during turn-off
(V/ns) (V/ns)
Upper drain-source voltage Lower drain-source voltage
spike during turn-on (V) spike during turn-off (V)
Turn-on energy loss based on Turn-off energy loss based on
drain current (µJ) drain current (µJ)
Turn-on energy loss based on Turn-off energy loss based on
channel current (µJ) channel current (µJ)
Total energy loss based on Total energy loss based on
drain current (µJ) channel current (µJ)
 1.4. Sweep gate loop inductance Lgs_L (0.1 nH, 5 nH, and 10 nH) under the operation

condition of 800 V dc bus voltage and 30 A load current

1.4.1. Plot simulation waveforms of a) lower gate-source voltage, b) lower drain-

source voltage, c) upper drain-source voltage, d) lower drain current, and e)

lower channel current

1.4.2. Summarize the switching data in the following table

Turn-on time (ns) Turn-off time (ns)

Peak dv/dt during turn-on Peak dv/dt during turn-off
(V/ns) (V/ns)
Upper drain-source voltage Lower drain-source voltage
spike during turn-on (V) spike during turn-off (V)
Turn-on energy loss based on Turn-off energy loss based on
drain current (µJ) drain current (µJ)
Turn-on energy loss based on Turn-off energy loss based on
channel current (µJ) channel current (µJ)
Total energy loss based on Total energy loss based on
drain current (µJ) channel current (µJ)

1.5. Plot the switching data (illustrated in y axis) dependence on gate loop inductance

Lgs_L (illustrated in x axis) as a function of operation conditions (different curves) and

explain the impact of gate loop inductance Lgs_L on these switching data, including

1.5.1. Turn-on time and turn-off time

Please plot turn-on time and turn-off time in two figures

1.5.2. Peak dv/dt during turn-on and turn-off

Please plot turn-on peak dv/dt and turn-off peak dv/dt in two figures

1.5.3. Upper and lower drain-source peak drain-source voltages

Please plot upper turn-on peak drain source voltage and lower turn-off peak drain source

voltage in two figures

 1.5.4. Turn-on, turn-off, and total energy loss based on drain current

Please plot turn-on energy loss, turn-off energy loss, and total energy loss in separated

figures

2. Impact of common source inductance

2.1. Sweep common source inductance Lss_L (0.1 nH, 5 nH, and 10 nH) under the

operation condition of 200 V dc bus voltage and 5 A load current

2.1.1. Plot simulation waveforms of a) lower gate-source voltage, b) lower drain-

source voltage, c) upper drain-source voltage, d) lower drain current, and e)

lower channel current

2.1.2. Summarize the switching data in the following table

Turn-on time (ns) Turn-off time (ns)

Peak dv/dt during turn-on Peak dv/dt during turn-off
(V/ns) (V/ns)
Upper drain-source voltage Lower drain-source voltage
spike during turn-on (V) spike during turn-off (V)
Turn-on energy loss based on Turn-off energy loss based on
drain current (µJ) drain current (µJ)
Turn-on energy loss based on Turn-off energy loss based on
channel current (µJ) channel current (µJ)
Total energy loss based on Total energy loss based on
drain current (µJ) channel current (µJ)

2.2. Sweep common source inductance Lss_L (0.1 nH, 5 nH, and 10 nH) under the

operation condition of 800 V dc bus voltage and 5 A load current

2.2.1. Plot simulation waveforms of a) lower gate-source voltage, b) lower drain-

source voltage, c) upper drain-source voltage, d) lower drain current, and e)

lower channel current

2.2.2. Summarize the switching data in the following table

 Turn-on time (ns) Turn-off time (ns)
Peak dv/dt during turn-on Peak dv/dt during turn-off
(V/ns) (V/ns)
Upper drain-source voltage Lower drain-source voltage
spike during turn-on (V) spike during turn-off (V)
Turn-on energy loss based on Turn-off energy loss based on
drain current (µJ) drain current (µJ)
Turn-on energy loss based on Turn-off energy loss based on
channel current (µJ) channel current (µJ)
Total energy loss based on Total energy loss based on
drain current (µJ) channel current (µJ)

2.3. Sweep common source inductance Lss_L (0.1 nH, 5 nH, and 10 nH) under the

operation condition of 200 V dc bus voltage and 30 A load current

2.3.1. Plot simulation waveforms of a) lower gate-source voltage, b) lower drain-

source voltage, c) upper drain-source voltage, d) lower drain current, and e)

lower channel current

2.3.2. Summarize the switching data in the following table

Turn-on time (ns) Turn-off time (ns)

Peak dv/dt during turn-on Peak dv/dt during turn-off
(V/ns) (V/ns)
Upper drain-source voltage Lower drain-source voltage
spike during turn-on (V) spike during turn-off (V)
Turn-on energy loss based on Turn-off energy loss based on
drain current (µJ) drain current (µJ)
Turn-on energy loss based on Turn-off energy loss based on
channel current (µJ) channel current (µJ)
Total energy loss based on Total energy loss based on
drain current (µJ) channel current (µJ)

2.4. Sweep common source inductance Lss_L (0.1 nH, 5 nH, and 10 nH) under the

operation condition of 800 V dc bus voltage and 30 A load current

2.4.1. Plot simulation waveforms of a) lower gate-source voltage, b) lower drain-

source voltage, c) upper drain-source voltage, d) lower drain current, and e)

 lower channel current

2.4.2. Summarize the switching data in the following table

Turn-on time (ns) Turn-off time (ns)

Peak dv/dt during turn-on Peak dv/dt during turn-off
(V/ns) (V/ns)
Upper drain-source voltage Lower drain-source voltage
spike during turn-on (V) spike during turn-off (V)
Turn-on energy loss based on Turn-off energy loss based on
drain current (µJ) drain current (µJ)
Turn-on energy loss based on Turn-off energy loss based on
channel current (µJ) channel current (µJ)
Total energy loss based on Total energy loss based on
drain current (µJ) channel current (µJ)

2.5. Plot the switching data (illustrated in y axis) dependence on common source

inductance Lss_L (illustrated in x axis) as a function of operation conditions (different

curves) and explain the impact of common source inductance Lss_L on these switching

data

2.5.1. Turn-on time and turn-off time

Please plot turn-on time and turn-off time in two figures

2.5.2. Peak dv/dt during turn-on and turn-off

Please plot turn-on peak dv/dt and turn-off peak dv/dt in two figures

2.5.3. Upper and lower drain-source peak drain-source voltages

Please plot upper turn-on peak drain source voltage and lower turn-off peak drain source

voltage in two figures

2.5.4. Turn-on, turn-off, and total energy loss based on drain current

Please plot turn-on energy loss, turn-off energy loss, and total energy loss in separated

figures
3. Impact of power loop inductance

3.1. Sweep power loop inductance Lds (20 nH, 40 nH, and 60 nH) under the operation

condition of 200 V dc bus voltage and 5 A load current

3.1.1. Plot simulation waveforms of a) lower gate-source voltage, b) lower drain-

source voltage, c) upper drain-source voltage, d) lower drain current, and e)

lower channel current

3.1.2. Summarize the switching data in the following table

Turn-on time (ns) Turn-off time (ns)

Peak dv/dt during turn-on Peak dv/dt during turn-off
(V/ns) (V/ns)
Upper drain-source voltage Lower drain-source voltage
spike during turn-on (V) spike during turn-off (V)
Turn-on energy loss based on Turn-off energy loss based on
drain current (µJ) drain current (µJ)
Turn-on energy loss based on Turn-off energy loss based on
channel current (µJ) channel current (µJ)
Total energy loss based on Total energy loss based on
drain current (µJ) channel current (µJ)

3.2. Sweep power loop inductance Lds (20 nH, 40 nH, and 60 nH) under the operation

condition of 800 V dc bus voltage and 5 A load current

3.2.1. Plot simulation waveforms of a) lower gate-source voltage, b) lower drain-

source voltage, c) upper drain-source voltage, d) lower drain current, and e)

lower channel current

3.2.2. Summarize the switching data in the following table

Turn-on time (ns) Turn-off time (ns)

Peak dv/dt during turn-on Peak dv/dt during turn-off
(V/ns) (V/ns)
Upper drain-source voltage Lower drain-source voltage
spike during turn-on (V) spike during turn-off (V)
Turn-on energy loss based on Turn-off energy loss based on
drain current (µJ) drain current (µJ)
 Turn-on energy loss based on Turn-off energy loss based on
channel current (µJ) channel current (µJ)
Total energy loss based on Total energy loss based on
drain current (µJ) channel current (µJ)

3.3. Sweep power loop inductance Lds (20 nH, 40 nH, and 60 nH) under the operation

condition of 200 V dc bus voltage and 30 A load current

3.3.1. Plot simulation waveforms of a) lower gate-source voltage, b) lower drain-

source voltage, c) upper drain-source voltage, d) lower drain current, and e)

lower channel current

3.3.2. Summarize the switching data in the following table

Turn-on time (ns) Turn-off time (ns)

Peak dv/dt during turn-on Peak dv/dt during turn-off
(V/ns) (V/ns)
Upper drain-source voltage Lower drain-source voltage
spike during turn-on (V) spike during turn-off (V)
Turn-on energy loss based on Turn-off energy loss based on
drain current (µJ) drain current (µJ)
Turn-on energy loss based on Turn-off energy loss based on
channel current (µJ) channel current (µJ)
Total energy loss based on Total energy loss based on
drain current (µJ) channel current (µJ)

3.4. Sweep power loop inductance Lds (20 nH, 40 nH, and 60 nH) under the operation

condition of 800 V dc bus voltage and 30 A load current

3.4.1. Plot simulation waveforms of a) lower gate-source voltage, b) lower drain-

source voltage, c) upper drain-source voltage, d) lower drain current, and e)

lower channel current

3.4.2. Summarize the switching data in the following table

Turn-on time (ns) Turn-off time (ns)

Peak dv/dt during turn-on Peak dv/dt during turn-off
(V/ns) (V/ns)
 Upper drain-source voltage Lower drain-source voltage
spike during turn-on (V) spike during turn-off (V)
Turn-on energy loss based on Turn-off energy loss based on
drain current (µJ) drain current (µJ)
Turn-on energy loss based on Turn-off energy loss based on
channel current (µJ) channel current (µJ)
Total energy loss based on Total energy loss based on
drain current (µJ) channel current (µJ)

3.5. Plot the switching data (illustrated in y axis) dependence on power loop inductance

Lds (illustrated in x axis) as a function of operation conditions (different curves) and

explain the impact of power loop inductance Lds on these switching data

3.5.1. Turn-on time and turn-off time

Please plot turn-on time and turn-off time in two figures

3.5.2. Peak dv/dt during turn-on and turn-off

Please plot turn-on peak dv/dt and turn-off peak dv/dt in two figures

3.5.3. Upper and lower drain-source peak drain-source voltages

Please plot upper turn-on peak drain source voltage and lower turn-off peak drain source

voltage in two figures

3.5.4. Turn-on, turn-off, and total energy loss based on drain current

Please plot turn-on energy loss, turn-off energy loss, and total energy loss in separated

figures

4. Impact of gate resistance

4.1. Sweep gate resistance Rg_L (2 Ω, 10 Ω, 20 Ω) under the operation condition of 200 V

dc bus voltage and 5 A load current

4.1.1. Plot simulation waveforms of a) lower gate-source voltage, b) lower drain-

source voltage, c) upper drain-source voltage, d) lower drain current, and e)

 lower channel current

4.1.2. Summarize the switching data in the following table

Turn-on time (ns) Turn-off time (ns)

Peak dv/dt during turn-on Peak dv/dt during turn-off
(V/ns) (V/ns)
Upper drain-source voltage Lower drain-source voltage
spike during turn-on (V) spike during turn-off (V)
Turn-on energy loss based on Turn-off energy loss based on
drain current (µJ) drain current (µJ)
Turn-on energy loss based on Turn-off energy loss based on
channel current (µJ) channel current (µJ)
Total energy loss based on Total energy loss based on
drain current (µJ) channel current (µJ)

4.2. Sweep gate resistance Rg_L (2 Ω, 10 Ω, 20 Ω) under the operation condition of 800 V

dc bus voltage and 5 A load current

4.2.1. Plot simulation waveforms of a) lower gate-source voltage, b) lower drain-

source voltage, c) upper drain-source voltage, d) lower drain current, and e)

lower channel current

4.2.2. Summarize the switching data in the following table

Turn-on time (ns) Turn-off time (ns)

Peak dv/dt during turn-on Peak dv/dt during turn-off
(V/ns) (V/ns)
Upper drain-source voltage Lower drain-source voltage
spike during turn-on (V) spike during turn-off (V)
Turn-on energy loss based on Turn-off energy loss based on
drain current (µJ) drain current (µJ)
Turn-on energy loss based on Turn-off energy loss based on
channel current (µJ) channel current (µJ)
Total energy loss based on Total energy loss based on
drain current (µJ) channel current (µJ)

4.3. Sweep gate resistance Rg_L (2 Ω, 10 Ω, 20 Ω) under the operation condition of 200 V

dc bus voltage and 30 A load current

 4.3.1. Plot simulation waveforms of a) lower gate-source voltage, b) lower drain-

source voltage, c) upper drain-source voltage, d) lower drain current, and e)

lower channel current

4.3.2. Summarize the switching data in the following table

Turn-on time (ns) Turn-off time (ns)

Peak dv/dt during turn-on Peak dv/dt during turn-off
(V/ns) (V/ns)
Upper drain-source voltage Lower drain-source voltage
spike during turn-on (V) spike during turn-off (V)
Turn-on energy loss based on Turn-off energy loss based on
drain current (µJ) drain current (µJ)
Turn-on energy loss based on Turn-off energy loss based on
channel current (µJ) channel current (µJ)
Total energy loss based on Total energy loss based on
drain current (µJ) channel current (µJ)

4.4. Sweep gate resistance Rg_L (2 Ω, 10 Ω, 20 Ω) under the operation condition of 800 V

dc bus voltage and 30 A load current

4.4.1. Plot simulation waveforms of a) lower gate-source voltage, b) lower drain-

source voltage, c) upper drain-source voltage, d) lower drain current, and e)

lower channel current

4.4.2. Summarize the switching data in the following table

Turn-on time (ns) Turn-off time (ns)

Peak dv/dt during turn-on Peak dv/dt during turn-off
(V/ns) (V/ns)
Upper drain-source voltage Lower drain-source voltage
spike during turn-on (V) spike during turn-off (V)
Turn-on energy loss based on Turn-off energy loss based on
drain current (µJ) drain current (µJ)
Turn-on energy loss based on Turn-off energy loss based on
channel current (µJ) channel current (µJ)
Total energy loss based on Total energy loss based on
drain current (µJ) channel current (µJ)
 4.5. Plot the switching data (illustrated in y axis) dependence on gate resistance Rg_L

(illustrated in x axis) as a function of operation conditions (different curves) and

explain the impact of gate resistance Rg_L on these switching data

4.5.1. Turn-on time and turn-off time

Please plot turn-on time and turn-off time in two figures

4.5.2. Peak dv/dt during turn-on and turn-off

Please plot turn-on peak dv/dt and turn-off peak dv/dt in two figures

4.5.3. Upper and lower drain-source peak drain-source voltages

Please plot upper turn-on peak drain source voltage and lower turn-off peak drain source

voltage in two figures

4.5.4. Turn-on, turn-off, and total energy loss based on drain current

Please plot turn-on energy loss, turn-off energy loss, and total energy loss in separated

figures