TINA/Spice/TPS54620: injection of slope in current mode controlled DC DC buck regulator

sreenu koruprolu

Part Number: TPS54620
Other Parts Discussed in Thread: TINA-TI

Tool/software: TINA-TI or Spice Models

How to made slopes of inductor currents equal by injecting a common compensating slope on to them.

(Note: take two output inductors of two current mode controlled DC DC buck regulators of different input voltages 5V and 12V and they are to be operated in parallel of output voltage 3.3V)

please explain the implementation of it using TINA.

over 7 years ago

0 Nikhil Gupta (Product Folder Models) over 7 years ago

TI__Mastermind 39210 points

Sreenu,

Do you already have a circuit for this that you need help implementing in TINA-TI or are you looking for help coming up with a circuit for this? If it is the former, please share your circuit with us. If it is the latter, I will move this to a different E2E forum.

0 sreenu koruprolu over 7 years ago in reply to Nikhil Gupta (Product Folder Models)

Prodigy 100 points

Hi,thanks for the reply,Actually I am looking for help coming up with a circuit for this.

0 Nikhil Gupta (Product Folder Models) over 7 years ago in reply to sreenu koruprolu

TI__Mastermind 39210 points

You can probably use an OR-ing controller for this. I will move this to another forum for further comments.

0 Antenna_Head over 7 years ago

TI__Genius 11395 points

The duty cycle of the Vin = 12V branch will be very different than that of the Vin = 5V branch.

Because of this, the two supplies will not be able to share curent simply by adding slope compensation.

However, I have done some work to address this problem and be able to load share between two different supplies.

If you can provide some more details about the specifics of what you need I can provide some more input.

Best, S. Dunbar, AFA Colorado

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TINA/Spice/TPS54620: injection of slope in current mode controlled DC DC buck regulator