Texas Instruments C2000

Switching Requirements – PSFB
• Asymmetrical PWM
• Using dead-band module
• Phase (Φ) is the control variable
• Duty fixed at ~ 50%
• RED / FED control ZVS trans.
i.e. via resonance
• CMPB can trigger ADC SOC
INIT-time
• Period (1,2)
• CMPA (1,2) ~ 50%
• CAu action (1,2)
• ZRO action (1,2)
• CBu trigger for ADC SOC
RUN-time
• Phase (2) – every cycle
• FED / RED (1,2) – slow loop