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Original question:

UCD3138128A: UCD3138

TPS2411 UCD3138128A: UCD3138128A:

Gianluca Giancola
Prodigy 60 points
Part Number: UCD3138128A
Other Parts Discussed in Thread: PMP40586, , TPS2411

Tool/software:

Hello everyone

regarding the thread (https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1399822/ucd3138128a-ucd3138), I still have a question about the integrated circuit 'TPS2411PWR,' which controls the ORing system of the DC-DC converter.

To connect the pins to the high-voltage output of the converter (let me remind you that mine is a boost converter with a 600V DC output), is it sufficient to create an appropriate resistive divider?

(For example, I see that pin 11, labeled 'A,' is directly connected to the 12V_F output, which in the reference design PMP40586 is at 12V DC, whereas on my DC-DC Boost Converter, the output is at 600V DC).

Best regards, Gianluca.

  • 0
    TI__Genius 10465 points

    Hello Gianluca,

    Since this is a question regarding the TPS2411 and not the UCD3138128A, I will redirect this question to the right expert.

    Regards,

    Jonathan Wong

  • 0 in reply to Jonathan Wong
    TI__Guru 53880 points

    Hi Gianluca,

    TPS2411 is rated for 16.5V. Are you trying to scale down 600V to ~12V for controller to not get damaged?

    Even if it is done, the FETs will never turn-on because the GATE will be driven to ~ VA + 10V and the source of the FETs will be at 600V and VGS will be almost zero. Did I understand you correctly?

    Regards,

    Shiven Dhir