5.11 Load Step Response

Figure 5-32. Load Step Response. VOUT = 12V, IOUT = 40A to 90A

Test conditions:

VIN = 800V, VOUT = 12V, IOUT = 40A to 90A

Channel details:

Channel 1: Output voltage

Channel 2: Transformer primary current

Channel 3: Transformer primary voltage

Channel 4 : Current sensor output

Observations:

Current loop responds quickly, and the voltage dips from 12V to 10.4V in 660 us.

Figure 5-33. Load Dump Response. VOUT = 12V, IOUT = 90A to 40A

Test conditions:

VIN = 800V, VOUT = 12V, IOUT = 90A to 40A

Channel details:

Channel 1: Output voltage

Channel 2: Transformer primary current

Channel 3: Transformer primary voltage

Channel 4: Current sensor output

Observations:

Current loop responds quickly, and the voltage overshoots from 12V to 13.5V in 720 us.