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Original question:

[FAQ] What are the differences between the dual channel isolated gate drivers?

UCC21520: Why the UCC20520 can't drive GaN devices?

Danilo A.
Mastermind 30350 points
Part Number: UCC21520
Other Parts Discussed in Thread: UCC20520, UCC20225

Hi Team,

The FAQ shows that there are few differences in the electrical characteristics of UCC20520 and UCC20225. Our customer would like to understand why the UCC20520 can't drive GaN devices. Can you please enlighten us?

Regards,

Danilo

  • 0
    TI__Guru**** 189401 points

    Hi, Danilo,

    I assume you are referring to this FAQ? https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1052108/faq-what-are-the-differences-between-the-dual-channel-isolated-gate-drivers

    GaN devices usually have a lower gate-to-source voltage requirement than the other technologies. So, we promote our devices with a 5V UVLO in applications utilizing GaN transistors. If the customer is looking at GaN devices with higher gate-to-source requirements then any of the parts will work, assuming the correct UVLO level.

    Let us know if there are further questions. Otherwise, please press the Green button to let us know your question is answered.

    Best regards,

    Don

  • 0 in reply to Don Dapkus
    TI__Expert 3118 points

    Hi Don,

    I have similar question about following devices where UVLO is equal, can you please comment if UCC20520 can be used with GaNFET?

    UCC20225

    UCC20520
    TI.com inventory 0 0
    Number of channels (#) 2 2
    Isolation rating (Vrms) 2500 5700
    Power switch
    MOSFET
    GaNFET
    MOSFET
    IGBT
    Peak output current (A) 6 6
    Features
    Disable
    Programmable dead time
    Disable
    Programmable dead time
    Package Group
    VLGA | 13
    SOIC | 16
    Approx. price (USD)
    $1.323 | 1ku
    $1.668 | 1ku
    DIN V VDE V 0884-10 transient overvoltage rating (Vpk) 3535 8000
    DIN V VDE V 0884-10 working voltage (Vpk) 792 2121
    Output VCC/VDD (Max) (V) 25 25
    Output VCC/VDD (Min) (V) 9.2 9.2
    Input VCC (Min) (V) 3 3
    Input VCC (Max) (V) 18 18
    Prop delay (ns) 19 19
    Input threshold
    TTL
    CMOS
    TTL
    CMOS
    Operating temperature range (C)
    -40 to 125
    -40 to 125
    Package size: mm2:W x L (PKG)
    13VLGA: 25 mm2: 5 x 5 (VLGA | 13)
    16SOIC: 77 mm2: 7.5 x 10.3 (SOIC | 16)
    Rating Catalog Catalog
    Bus voltage (Max) (V) 792 2121
    Fall time (ns) 7 7
    Rise time (ns) 6 6
    Undervoltage lockout (Typ) 8 8

    Thanks in advance

    Best Regards

    Furkan Sefiloglu

  • 0 in reply to Furkan Fehmi Sefiloglu
    TI__Guru**** 189401 points

    Hi, Furkan,

    Nice to hear from you!

    Yes, there is no inherent reason why the UCC20520 can't be used to drive GaN. We just tried to simplify the product selection for customers, but it seems it's caused more confusion.

    So, if all the specs are ok for your design, the UCC20520 can be used to drive GaN transistors.

    Best regards,

    Don