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TPSI3050-Q1: TIDA-050059 Questions

Part Number: TPSI3050-Q1
Other Parts Discussed in Thread: TIDA-050059,

Hi,

Checking the current limit circuit for TIDA-050059.

MOSFET voltage: 806V

MOSFET current: 36A

Initial peak current: 100A

Q1. In the circuit configuration below, what is the reaction time from 36A detection to MOSFET GATE signal shut-off?

Q2. If the current drops below 36A after blocking the MOSFET GATE signal, will it be restarted immediately?

  • Hi Cho SR, 

    Thank you very much for reaching out to us with these questions. I will answer your questions and then provide more details. 

    Q1. This depends in the configuration you are using. There is the Immediate Overcurrent Protection (section 2.3.1.1) and the Adjustable Delay Overcurrent Protection (section 2.3.1.2). Section 3.3 Test Results provides measured delays. 

    Q2. Yes. This specific reference design features a auto-retry feature. Equation (10) shows the calculations. In this design it will retry after ~38ms if the adjustable delay was triggered. 

    This reference design was created to show the uses of the TPSI3050-Q1 for protection features. The reference design has two thresholds. 

       - 2A-5A: 100ms wait time before disconnecting the load

       - >5A: immediate load disconnect. Measured delay ~6us. Section 3.3 Test Results touches in these values. 

    These delays are adjustable and depend on what is your configuration. 

    The reference design features a RC delay before reconnecting the load because of the AND gate used. However, this logic can always be changed or modify depending on what component is used. 

    I hope this provides and idea on how flexible the design is and how it can be modified. In general I would say section 2.3.1 Overcurrent Protection explains in details all the features and calculations for these delays.  

    Let us know if this answers all of your questions. 

    Sincerely, 

    Francisco Lauzurique