Other Parts Discussed in Thread: TL431 Hi all,
I have got problem to understand the operation of relay for inrush current limit in PMP4311 design.
Here is my understanding: During power up, the coil of relay will be supplied with 13V, thus the NO contact…
Thanks for attaching the drawing.
The EN input of UCC27322D is internally pulled up to VDD with a 100k resistor. When EN is high or floating the device is enabled and when EN is low the device is disabled. So you do not need to connect this pin to VD…
Hi Alboussiere,
you can try R9/R10 to set a high level power limit threshold.
for the diode+zener, I suggest you follow the schematic with PMP4311.(diode: BAS16, Zenor:33V)
www.ti.com/.../slur515.pdf
Hi Mownika,
Based on what you provided me, I have a few observations:
VIN appears to be ~400V. You should change that to your expected VIN. That may also explain why the input current is non-sinusoidal.
Your inductors appear to be the same used in the…
One short follow up question. I saw in e.g. PMP4311 that R_IMO was adjusted depending on working with single phase or interleaved phases via a MOSFET Q2. So far I could not find any hints on how to calculate R_IMO if UCC28070 runs one phase only. Can…
Part Number: UCC28070 Dear TI support teams:
I have designed an AC/DC converter using UCC28070. There is a start-up in-rush current issue. The design is:
CDR tied to VREF
RDM tied to GND
Current Sensing resistor is 26 ohm for both CSB and CSA.
PKLMT…
Now we think current cross zero area is large as picture, How can we improve it?
Do you need us provide more design specs ?
We refer TI PMP4311 5KW design.
Hello Bob,
The UCC28064A is a Transition-Mode (TM) dual-interleaved PFC controller normally used with AC inputs. TM-PFC becomes impracticable (although not impossible) at power levels greater than around 500-600W. Most reference designs are for power…