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WIP
Buck Converter
Characterization
Load Regulation & Efficiency
Objective | Evaluate buck’s Vout stability across all load conditions Measure efficiency across all load conditions
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Conditions | Vin = 55V, 44.4V, 36V, 25.2V, 22.2V, 18V Iout from 0A to 4A with 50 data points (0.08A step) Set power supply slew rate to minimum Temperature: room Use 4-wire sensing on power supply Don’t use the same wire that goes to eload to measure Vout
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Procedure (scripting) | Solder 1 pair of wires to eload, 1 wire at Vout Connect DMM to Vout Connect Power supply to Vin Turn on power supply
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Load Transient
Line Regulation
Output Noise
Common Mode Noise
with functional generator
Start-up behavior
Shut-down behavior
Safety Tests
Over Current
Short Circuit
Over voltage
input voltage surge
Efuse
Characterization
Start-up
Shut-down
OCP
Short Circuit
PWM Buffer
Characterization
No buffer test
Inject PWM signal at 50% duty cycle at 50Hz
Buffer test
Inject Triangle signal range from 0V to 5V at 50Hz
Inject PWM signal at 50% duty cycle at 50Hz