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Showing 68 results View by: Thread Post Sort by

  • UCC21521: Ringing/oscillation on MOSFET gate

    TI Thinks Resolved
    Part Number: UCC21521 Hi, we are facing same problems discussed in the following thread about gate ringing oscillations: https://e2e.ti.com/support/motor-drivers-group/motor-drivers/f/motor-drivers-forum/895653/drv8305-ringing-oscillation-on-mosfet…
    • Answered

  • UCC21521: UCC21521

    Resolved
    Part Number: UCC21521 Hi Can we connect negative bias voltage to VSSA and VSSB terminal? In datasheet it is not clear that what is rating of the pin. Thanks Devendra
    • Resolved

  • UCC21521: UCC21521 failure: OUTB shorted to VSSB and VDDB shorted to VSSB

    Part Number: UCC21521 Hello, My name is Abhishek K SIngh and I was using UCC21521 to provide gate signal to a Hex-bridge to control position of a BLDC motor. I have used three UCC21521 ICs, one to control one leg (high side MOSFET and Low side MOSFET…

  • UCC21521: Can NC pin connect to GND?

    TI Thinks Resolved
    Part Number: UCC21521 Hi Team, When I look at D/S, NC pin has no connection with internal circuit. So, that mean customer can connect NC to GND? or left open is recommended? Regards, Kotaro Yamashita
    • Answered

  • UCC21521: UVLO destroys the first pulses of a short tone burst on the Bootstrap capacitor on the high side output

    Resolved
    Part Number: UCC21521 Other Parts Discussed in Thread: PMP23223 I am trying to use a pair of UCC21521 as a full bridge high voltage pulser. During the beginning of the short 5 cycle tone burst the UVLO activates on the High Side Output and does not permit…
    • Resolved
    • Answered

  • UCC21521: Isolated voltage for "functional isolation" between CHA and CHB

    Resolved
    Part Number: UCC21521 Other Parts Discussed in Thread: UCC5310 Hi Expert, I can see for two-channel isolated gate driver(e.g. UCC21521), CHA and B has a functional isolation, the distance between VSSA to VDDB is about 3.8mm . This device can work…
    • Resolved

  • UCC21521: Isolated Gatedriver needed for new inverter design

    TI Thinks Resolved
    Part Number: UCC21521 Hi, my customer is looking for an isolated gate driver, they looked at UCC21521 and wonder whether it is the right choice. Here are their questions: We are looking for MOS driver for a new inverter. HV DC-link voltage will be…

  • RE: UCC21521: UCC21521 question about OUTA, OUTB terminal.

    Hi Bob, Thank you for your question. I work on the applications team in the high power drivers group. Since both channels are functionally isolated from each other, you can use them in any configuration. Using OUTB for High side and OUTA for Low side…

  • UCC21521: Part to part skew

    TI Thinks Resolved
    Part Number: UCC21521 Hi Team, Good day. Can you please confirm the following. 1.what is the part to part skew (propagation delay matching between parts)? 2. what is the minimum Propagation Delay of this device(tpdlh and tpdhl)? Thank you and looking…

  • UCC21521: UCC21521 high-side gate turn on time too long

    TI Thinks Resolved
    Part Number: UCC21521 Dear Team, my customer is testing UCC21521 (PSPICE & Board). For UVLO at VDDA circuit they noticed that the part is taking 52-56us until high-side gate can be turned on AFTER the highside UVLO threshold (13.5V) has been triggered…
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