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TIDA-010236: Totem pole PFC solution

Conor
Mastermind 10000 points
Part Number: TIDA-010236
Other Parts Discussed in Thread: TIDA-010203, TMS320F280025C

Tool/software:

Hi,

I am looking for a totem pole PFC solution with TI products.

[Conditions]

 - Input voltage: AC200V or 400V

 - PFC output: 400V

 - Output power: 3300W

I am considering a reference design for a totem pole PFC using C2000 based on the above configuration.

 - TIDA-010236: 4kW GaN-based (LMG352x) totem pole PFC

 - TIDA-010203: 4kW GaN-based (LMG342x) totem pole PFC

If the input voltage is AC200V, the above configuration is very helpful. However, if the input voltage is AC400V, TI's GaN products have a voltage rating of 600V, so SiC FETs must be considered. Totem pole PFC requires high switching frequency and fast response, so GaN FETs are very suitable. Perhaps for this reason, I could not find any reference designs for C2000 + SiC FET configuration.

Q1. Are there any totem pole PFC solutions that support AC400V?

Q2. TIDA-010236 and TIDA-010203 are designed with GaN FETs in mind, but can I use them as a reference for designing SiC FETs? Would it be difficult to use them as a reference due to issues with switching frequency and heat dissipation design?

Thanks,

Conor

  • 0
    TI__Intellectual 2305 points

    Hi Conor,

    Our expert is out of office, we will reply you within this week.

    thank

    Jenson

  • 0 in reply to Jenson
    TI__Intellectual 780 points

    Hi, Conor

    For Q1:  TI does not have TTPL PFC supports 400VAC input for now.

    For Q2:  you can still use TIDA-010236 and TIDA-010203 with SiC to support high voltage inputs, since topology and software algorithm are still same.

    For efficiency and switching frequency, SiC and GaN should be similar for this application.

    Regards

    Hely

  • 0 in reply to Hely Zhang
    Mastermind 10000 points

    Hi Hely,

    Hely Zhang said:
    For Q1:  TI does not have TTPL PFC supports 400VAC input for now.

    Does TI have any plans to release a reference design for TTPL PFC compatible with 400VAC? In the case of GaN FETs, I think this is possible with evolution of the manufacturing process(high voltage resistance).

    Also, is the reason why TTPL PFC for SiC has not been released due to compatibility issues between TTPL and SiC? By compatibility, I mean high efficiency, high-speed switching, etc.

    In addition, totem pole PFC is suitable for medium to high power power supplies (several hundred watts to several kW), where the characteristics of GaN are often more important. Is this also a factor in the fact that SiC is rarely chosen for design?

    Hely Zhang said:
    For Q2:  you can still use TIDA-010236 and TIDA-010203 with SiC to support high voltage inputs, since topology and software algorithm are still same.

    Are there any precautions to take when considering SiC FETs based on TIDA-010236 or TIDA-010203?

    For example, I understand that when using SiC FETs, the following are different from GaN FETs.

    -SiC FETs are usually optimized for switching frequencies of several hundred kHz, which may result in larger switching losses than GaN.

    -SiC FETs operate at higher gate voltages (usually 10V to 20V). In addition, due to their larger gate capacitance, different gate drivers or driver design changes are required.

    -SiC FETs may generate more heat than GaN, and appropriate heat dissipation measures may be required.

    Thanks,

    Conor

  • 0 in reply to Conor
    TI__Intellectual 780 points

    Hi, Conor

    Pls check my answers below:

    Does TI have any plans to release a reference design for TTPL PFC compatible with 400VAC? In the case of GaN FETs, I think this is possible with evolution of the manufacturing process(high voltage resistance). HELY: No, we don't have this plan.

    Also, is the reason why TTPL PFC for SiC has not been released due to compatibility issues between TTPL and SiC? By compatibility, I mean high efficiency, high-speed switching, etc. HELY: GaN is enough for TTPL PFC under 220VAC input, SiC cost is higher at this voltage level.

    In addition, totem pole PFC is suitable for medium to high power power supplies (several hundred watts to several kW), where the characteristics of GaN are often more important. Is this also a factor in the fact that SiC is rarely chosen for design?HELY: yes, i think you are right, reasont o use GaN is it's power level and low power loss.

    Are there any precautions to take when considering SiC FETs based on TIDA-010236 or TIDA-010203?

    HELY: TI GaN has built-in gate driver, you need to choose a gate drive for SiC. Voltage/current sensing circuit need also be re-calculated due to high input and output voltage. 

    Regards

    Hely

  • 0 in reply to Hely Zhang
    Mastermind 10000 points

    Hi Hely,

    I will mainly be considering TIDA-010236 and TIDA-010203. The reference design page did not mention the C2000 software. Would it be possible for you to provide me with source code that would be useful when considering a totem pole PFC? It would be even better if you had the software used to verify the operation of TIDA-010236 and TIDA-010203.

    Thanks,

    Conor

  • 0 in reply to Conor
    TI__Intellectual 780 points

    Hi, Conor

    We have software, can you contact our local sales?

    Regards

    Hely

  • 0 in reply to Hely Zhang
    Mastermind 10000 points

    Hi Hely,

    Will it be available in the SDK on the web? Do I need an NDA for the reference design software?
    Also, is the source code for TIDA-010236 and TIDA-010203 provided based on the TMS320F280025C?

    Thanks,

    Conor