Hi Steven,
After changing R593 to 20K ohm, the abnormal noise problem of the transformer was solved.
But it still only has 12V/3A output, which cannot reach the 12V/5A output designed as PMP22075.
5732.Isolated power design 48V to 12V (120…
Daniel,
I don't believe you should draw the conclusion of a 10:1 ratio between capacitors on VREF and VDD. VREF needs a capacitor strictly for stability and 0.1uF is what I would recommend. PVDD is the bias voltage powering the driver output stage and…
Hi ACGUY,
I would suggest using the transformer windings and feeding to external gate drivers. No need for the UCC24610's. Take a look at PMP3162: http://www.ti.com/lit/df/slur815/slur815.pdf . This is an active clamp forward with synchronous rectification…
Part Number: PMP9720 Other Parts Discussed in Thread: UCC27511 , UCC2897A , CSD18532Q5B Hi team,
We are using UCC2897A as ACF controller and PMP9720 as our circuit model. However, the Aux winding voltage dropped under controller working voltage Vcc…
Hi Ben,
Here is my check result.
Waveform below was captured at E pin of Q8, it was a constant voltage value around 12V:
Waveform below was captured at OUTH, OUTL at UCC27511 (U1 and u4);
Ch1 was captured at OUTH & L on U1;
Ch2 was captured…
Hello Rajan,
This driver is one of legacy devices therefore some of the IC's parameters may not be readily available. Maybe I can interest in our latest most optimized drivers likey UCC27511 and/or UCC27517 if the split ground is not a requirement in…
Hello Rich,
Thanks for your interest in our drivers.
It sounds like you're using the driver to the primary windings of a transformer. I ask because this is one of legacy low-side driver and if you can share your application block diagram and/or schematic…
Part Number: UCD3138 Other Parts Discussed in Thread: UCD3028 , UCC27511 ,
Hello everyone,
Our customer have questions as follows ,what's the root causes caused by this phenomenon when surge test?
CH3 GPIO pin volatge level from 3.3V down to 1.7V…
Hello Sayan,
You can download the driver models from UCC27511 product page. (the models are on the non-automotive part)
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Aaron…
Sam, Thank you for your answer. You did totally get the real reason of my question: cost. Would it help if I tell you that the converter is going to feed the current mode controller (of a push-pull topology operating at 100 kHz) that sources 500 mA per…
