5.10.2 Voltage Loop Measurement for Single Rail Operation

Figure 5-29. Voltage Loop Measurement VIN = 800V, VOUT = 12V, IOUT = 80A
A graph of a frequency AI-generated content may be incorrect.

Test conditions:

VIN = 800V, VOUT = 12V, IOUT = 80A

Results:

Phase margin = 90⁰

Gain margin = -19.4dB

Crossover frequency = 625Hz

Crossover slope = -20dB/decade

Figure 5-30. Voltage Loop Measurement, VIN =800V, VOUT = 12V, IOUT = 90A
A graph of a frequency AI-generated content may be incorrect.
Figure 5-31. Gain, Phase Comparison for VIN =500V/600V/700V/800V, VOUT = 12V
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Observations:

At different input voltage from 500V to 800V, plant gain variation is very small due to the transformer turns to ratio (17:01), therefore, an AGC (Adaptive gain control) is not required.