• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Subscribers 64 subscribers
  • Views 205 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

DCP011515DB: Connecting review

FRANK1
Expert 8075 points
Part Number: DCP011515DB

Hi sir，

Now I want to input +15V, -15V to generate +30V， -30V output.
I want to choose DCP011515DBP-U of TI.
Can you review if my connection is correct?


There is a potential difference of 60V between A and B because the secondary side is isolation.
From the GND (0V), we can see the absolute potential value of +30V, -30V, right?
Or should the COM terminal be connected to GND?
I want an absolute potential of +30, -30V.
Please help me to verify this design.
Thanks.

  • +1
    TI__Expert 8130 points

    Hi Frank,

    Attached below is what an isolated ±30V application would look like. The primary and isolated grounds may be tied together, but all four output filter capacitors and associated connections are required.

    Regards,
    Alejandro

  • 0 in reply to iAlejandro
    TI__Expert 8075 points

    Hi Alejandro,

    Thank you.

    is it OK for the updated schematic?
    BTW, can I connect SYNCIN(IC1) to SYNCIN (IC2)?

    Is that better？

    Is there anything I need to pay attention to in PCB design?

    Thanks。

  • +1 in reply to FRANK1
    TI__Expert 8130 points

    Hi Frank,

    The SYNC_IN pins on these modules may be tied together. If they are connected together, the two device oscillators will synchronize, if unconnected the two devices will switch independently with random phase and frequency variations. But, it is important to minimize the stray capacitance seen by SYNC_IN connections when tied together. Any added capacitance on SYNC_IN will slow the oscillators. Below I've provided the two sections in datasheet which will be very helpful in your design.

    Regards,
    Alejandro