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UCC27710: Precautions when replacing UCC27710D

Conor
Mastermind 9800 points
Part Number: UCC27710
Other Parts Discussed in Thread: LM5116, , UCC27712, UCC21551

Tool/software:

Hi,

We are considering replacing the 2EDL05N06PF.

2EDL05N06PF:https://www.infineon.com/dgdl/Infineon-2EDL05x06xx-DataSheet-v03_03-EN.pdf

The IC above is used in the configuration shown in the image above. We are considering the UCC27710D as a replacement. Some important considerations when selecting the UCC27710D as a replacement are as follows:

1. The UCC27710D can handle up to 620V, which is sufficient for the high-side input voltage of the circuit, 380V DC.

2. Like the 2EDL05N06PF, the UCC27710D is also designed for a half-bridge configuration, allowing it to drive both the high-side and low-side MOSFETs independently. In this case, only the high-side is being used, so it is fine to connect the unused low-side driver input/output to GND.

3. The UCC27710D supports high switching frequencies, including 100kHz PWM signals, ensuring compatibility with existing control logic.

4. The UCC27710D provides sufficient gate drive strength (up to 4A peak current) to efficiently drive the MOSFETs in the design.

Q1.
Taking into account 1-4, I have selected the UCC27710D as an alternative. Am I understanding 1-4 correctly? Also, if there are any other half-bridge ICs that you recommend or can replace, please let me know.

Q2.
If there are any devices that you can introduce with a different circuit configuration, such as a DCDC control IC that does not require a drive IC, please let me know.

If I understand correctly, TI's DCDC control ICs (such as the LM5116) have a voltage rating of 100V and cannot directly drive the above circuit.

Thanks,

Conor

  • 0
    TI__Mastermind 21685 points

    Hello Conner,

    I can address the questions regarding the gate driver, UCC27710. But for details on the controllers, I would suggest posting a similar thread but show the controller in the main subject line. There are integrated LLC controllers that can drive high voltage circuits, but I am not the expert on those devices, there may be more device options.

    For the UCC27710 comments, line 4 is not correct, the UCC27710 has 0.5A source and 1A sink drive current. This is however higher than the Infineon device you listed. There is a higher current similar driver from TI. The UCC27712 which has 1.8A source and 2.8A sink current. Your other statements are true.  A bus of 380V can be supported, although you have to ensure the switching peak voltages are within the driver IC ratings. The high side can be used stand alone. 100kHz frequency can be supported.

    Regards,

  • 0 in reply to Richard Herring
    Mastermind 9800 points

    Hi Richard,

    Thank you for your answer. Based on your answer, I will consider UCC27710 as a replacement candidate. I have also selected UCC5310M as one of the candidates to consider in order to improve system reliability.

    Please confirm whether UCC5310M matches the above system configuration. Isolation is not essential for this system, but if it provides an advantage in terms of improving reliability, I would like to consider it as one of the candidates.

    Thanks,

    Conor

  • 0 in reply to Conor
    TI__Mastermind 21685 points

    Hello Conner,

    I have added notification to our expert on the UCC5310M to address questions on that device. I expect that it will meet the requirements but will let the expert comment on the details.

    Regards,

  • 0 in reply to Conor
    TI__Genius 17756 points

    Hi Conner,

    The UCC5310M is a single channel gate driver, so you will need two units to drive a half-bridge. If you want to retain the interlock and deadtime functions, then you could use a dual channel gate driver like UCC21551.

  • 0 in reply to Sean Cashin
    Mastermind 9800 points

    Hi Sean,

    Could you please take a closer look at my first post?

    The schematic uses a half-bridge IC to drive the high side, and the low side is unused.

    Thanks,

    Conor

  • 0 in reply to Conor
    TI__Genius 17756 points

    I see. An isolated gate driver is probably a good idea for a 380V DC rail, since that is considered an unsafe amount of voltage (>50V).  A UCC5310M with a Miller clamp will be helpful when driving a Silicon FET, since they have high Miller capacitance. 

    Best regards,

    Sean