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TLV61048: TLV61048 curent limit behavior and PFM and burst mode.

Expert 4170 points

Replies: 3

Views: 82

Part Number: TLV61048

Hi, Team.

i've been asked by Customer as below.

Q1

when IC goes current limit, what type of current limit behavior IC would do? (cycle by cycle?)

 Q2.

Customer has thought that PFM mode in its datasheet looks like burst mode.

could you tell me what different between PFM mode and burst mode to clarify what PFM mode in its datasheet is?

 (in my understanding, PFM mode is that IC makes its Fsw low to avert switching loss in light mode.

burst mode is condition where the power supply control circuit and switching circuit are temporarily disabled when there is no load on the output. )

is there any specific different between them to articulate on what they are?

Q3, Mitsubishi wants to have Vout as 15.8V, 

can IC make it ? since Vout limitation is 15V in its datasheet.

Thanks.

Best Regards.,

  • Hi 

    Q1: Yes, it is cycle by cycle current limit. 

    Q2: it is burst mode. the device switches several cycle and stop for a period.

    Q3: The maximum output voltage is 14V. it can't support 15.8V. 

    what is the input/output voltage and current requirement from customer?

    Best Regards

    Jasper Li
    Boost Converter Solution 

  • In reply to Jasper Li:

    hi, please see below.

     Vin:5V

     Vout:15.8V/0.015  5% tolerant is ok

     Vout:-15V/0.015   5% tolerant is ok

     total Iout:30mA

    Thanks.

    Best Regards.,

  • In reply to Masaharu Takahashi:

    Hi Masaharu,

    I closed the post here as the issue is solved through email.

    Best Regards

    Jasper Li
    Boost Converter Solution 

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