Other Parts Discussed in Thread: UC3854A Hello,
One of our major customers HITRON who would like to design a 30W PFC for Avionics application.
Spec:
Vin=90V ~ 264Vac
AC line Frequency =360Hz ~ 800Hz
Pout =30W
Fosc =100KHz
Application…
Part Number: UCC28070 Other Parts Discussed in Thread: UC3854A , CURRENT SYNTHESIZER
The equation for the current synthesizer resistor R_SYN does not include the output voltage. Does the circuit get the output voltage information from the VSENSE pin…
Hello M. Huang,
we plan to use UCC2818 to implement a bridgless PFC boost. Then we do not have rectifier bridge at converter input. We use analog amplifiers to create the image of rectified input voltage and we inject it in the IAC pin using a howland…
Part Number: UCC28180 Other Parts Discussed in Thread: UC3854A , UCC28064A , UCC38050 I am in need of a PFC for a low power system ~40W maximum. While I do not require high power factor I do require low THD, >10%. My plan has been to use a CCM boost PFC…
Part Number: UCC28070 Other Parts Discussed in Thread: UC3854A According to the data sheet, when VINAC is not at the value corresponding to the kVFF for that range, the voltage error amplifier compensates by raising or lowering its output voltage VAO…
Hi Renan,
The startup supply current of UC3854A and UC3854B is 300uA. But I didn't find this information of UC3854.
I am checking it and will get back to you soon.
Regards,
Teng
The high line (176Vrms - 270Vrms) power limit is too loose (1000W at 176Vrms and 1600W at 270Vrms), right?
Did you follow the datasheet about multiplier design on page 20 and Table 2? Also, the datasheet mentions a design note, slua196a (can be downloaded…
Other Parts Discussed in Thread: UCC28180 , UC3854A , UCC28070 Dear Experts
While making a multiphase DC supply , i am in need of synchronization of UCC28180 with external signal coming from microcontroller , at first glance i couldnot find any reference…
Other Parts Discussed in Thread: UC3854A , UC3854B , UC2854A Reference spec page 2 And spec page 8 :
Q: Why setting 250uA Limit for AC high line ?
If over 250uA can influence which function ?
Which tolerance for this 250uA test plan in TI mass product…
Hi Navneet,
1, The threshold for PKLMT is 0.0 V. Connect this input to the negative voltage on the current sense resistor. Use a resistor to REF to offset the negative current sense signal up to GND. However, In your circuit, PKLMT is connected to…
