Class 13 - Multiphase PWM - Boost Converter Control

Boost Converter Circuit:

Typical boost converter circuit with FPGA PWM control:

• In the closed loop, ADC access and PID controller should be implemented inside the FPGA. 
• PID controller should adjust the PWM duty to control the output voltage @ desired level
• The PWM output from the FPGA should be interfaced with converter MOSFETgate with proper buffer and MOSFET driver.
• The direct FPGA I/O connection to the MOSFET Gate is not advisable.

Multiphase PWM Signal generation:

• If two or more MOSFETs in the design needs more than one PWM output with different switching phase.
• The above method, generate 'n' number PWMs output with desired phase shift.

Simulation Results:

• Simulation results shows 3 pwm outputs with different duty cycle and different phase shift

Source: eewiki

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