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  • UCC256403: How the latch of TIDA-010081 reference design work ?

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    Part Number: UCC256403 Other Parts Discussed in Thread: TIDA-010081 , Hi team, thanks for your support always. I have a question about latch of TIDA-010081 reference design. TIDA-010081 reference design | TI.com As I know that when latch be happened(OV or…
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  • UCC256403: UCC25640x Simplis Model

    TI Thinks Resolved
    Part Number: UCC256403 Hi, I'm developing board based on UCC256403, in order to well understand the operation. I dowload the simulation model of " CC25640x Simplis Model " from web. It work well as original setup of 380V in 24v vout. But our…

  • UCC256403: UCC256403 maximum switching frequency during startup

    TI Thinks Resolved
    Part Number: UCC256403 Hi Team, Have a good day! I have a question on device UCC256403. I noticed that in datasheet, SS initial voltage provides a freedom to limit the maximum switching frequency during startup. This helps to prevent hard switching due…
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  • UCC256403: Are there any conditions other than "OCP3 threshold" to enter OCP3 operation?

    Resolved
    Part Number: UCC256403 Figure 1 shows OCP3 operating waveforms. Figure 2 shows OCP3 not working. The ISNS pin (ch2) in Fig. 1 has an average value of 0.403V per cycle, so it corresponds to "OCP3 threshold min 0.40V". Figure 2 is also 0.449V…
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  • UCC256303: Design Concern of UCC256303 compatible with UCC256403

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    Part Number: UCC256303 Other Parts Discussed in Thread: UCC256403 Dear TI, My team is now using UCC256303 as HB LLC controller. I've notice that there's a update version which is UCC256403, one of the major different between them is minimum detectable…
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  • UCC256403: I want to know the variation data of RLL

    TI Thinks Resolved
    Part Number: UCC256403 I want to know RLL variation data and electrical characteristic data. min, max, ±3σ＝？？ Also, if there is temperature characteristic data, I would like it.

  • UCC256403: FB pin

    TI Thinks Resolved
    Part Number: UCC256403 Hi Sir, My customer have the below questions. 1. What conditions it will turn off the AVDD and internal MOSFET of the FB pin? UCC25640x LLC Resonant Controller Features Brief Overview and Bring up Guidelines 2. The IFB typical…

  • UCC256403: ISNS polarity is incorrect, but ZCS event does not occur.

    TI Thinks Resolved
    Part Number: UCC256403 When the low-side gate is turned off, the ISNS voltage is normally negative polarity, but there are cases where the positive polarity causes switching to continue without causing a ZCS event. Is this normal operation as an IC? Occurs…

  • UCC256403: IC gate drive Related issue

    TI Thinks Resolved
    Part Number: UCC256403 I am using UCC256403 for LLC half-bridge resonant drive. It is mentioned that it can source or sink 0.6A/1.2A of gate peak current. I am operating LLC around 400kHz max frequency. I have two major doubts 1. gate drive current mentioned…

  • UCC256403: How to disable burst mode of UCC256403 ?

    TI Thinks Resolved
    Part Number: UCC256403 Hi experts! Can this IC disable the burst mode? My customer has a high out ripple requirement. And they also know the basic operation principle of UCC256403, could you please help to explain it or whether there exists some literature…

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