5.16 Pre-Charge Operation

Figure 5-39. Open Loop Pre-Charge at Start-up V_OUT = 6V, load = 1Ω Constant Resistance

Channel details:

Channel 1: Output voltage

Channel 2: Output current

Comments:

On start-up, the firmware measures input voltage and calculates the required duty cycle to achieve V_OUT set point. The firmware increments phase-shift in open loop at a set rate until it reaches phase-shift set point.

Observations:

At around 2V, the short-circuit switch turns on, connecting the 1Ω constant resistance load.