Part Number: UC3854B Other Parts Discussed in Thread: UC2526 Respected sir,
we are doing the EMI/EMC test of our SMPS(1600W) . It is failing at high frequency (Greater than 20 MHz) region during conducted emission test.
We are using PFC Controller UC3854BDW…
Part Number: UC3854B Hi,
My current problem with the UC3854B is that the output dc voltage changes with the input and is not constant at any range of the input voltage.
What can be the reason for that?
Part Number: UC3854B Other Parts Discussed in Thread: UCC29910A I am not getting the PFC design to work properly and my output voltage level was less than input. Also the current waveform was badely distorted.
My input voltage varies from 5 to 70 v AC…
Part Number: UC3854B Other Parts Discussed in Thread: UC3854 , , UCC28180 Hi TI engineer .
For the research , I want to enhance freq to 680k Hz .
But I refer UC3854 Technical documents design the Ct = 174pF,Ccp = 10pF,Ccz = 62p.
I check the Ct cap frequency…
Part Number: UC3854B Hi ,
I am using UC3854B PWM IC in my PFC design. I am referring functional block diagram and found SR flip flop inputs named as RRS. Is it a printing mistake or else some thing else.
I feel one is clock (CLK) and other two are S &…
Part Number: UC3854B Hi TI,
Could you help to review the schematic as attachment?
Actually, we have a issue with the oscillation of gate output.
Some ICs on the same board have this oscillation and others do not have this problem.
Part Number: UC3854B Other Parts Discussed in Thread: UC3854
Hi Team, The following application note refers about "CURRENT AMPLIFIER OFFSET VOLTAGE CANCELLATION". http://www.tij.co.jp/jp/lit/an/slua172/slua172.pdf The design generates 4.28mV (…