Part Number: UC2854 Tool/software: We would like clarification on the following points: 1. What is the primary role of the parallel capacitor in the UC2854 voltage amplifier compensation network? 2. If the capacitor is removed, will this compromise the…
Part Number: UC2854
Tool/software:
In the loop compensation of the UC2854 IC, is there any relation between the loop compensation pin (Pin 7) and the PKLMT pin (Pin 2)? Specifically, is there any relation between the voltage loop compensation and…
Part Number: UC2854B Other Parts Discussed in Thread: UC2854 , UC2854A Tool/software: We would like to understand the current limiting mechanism of the UC2854B PFC controller.
In our design:
The multiplier block receives inputs from:
The DC output…
Part Number: UC2854 Tool/software: I am using a 3300pF capacitor for Ct and a 2.8kohm resistor for Rset. The measured frequency is ~101kHz but the calculated frequency is ~135kHz (F = 1.25/(Rset x Ct)). Why is there such a large discrepancy? The resistor…
Part Number: UCC2818-EP Other Parts Discussed in Thread: UC2854B-EP , UC2854 , UCC2818 Tool/software: Hi TI team
I would like to know which among these PFC ICs (UCC2818-EP and UC2854-EP) can have <5%THD on the input current for input frequency of…
Part Number: UCC2817 Other Parts Discussed in Thread: UC2854 , UC2854A Hello. I would like to know if UCC2817 can be used as a direct replacement for UC2854, only with accessory RLC component changes?
I have an application that uses the UC2854A to drive…
Part Number: UC2854 Dear Team,
I would like to know what will be the Multiplier output voltage when Vff is above 4.5 V. Does it will go to zero nor clamped at any particular voltage.
Thanks and Regards
D Arun Kumar
Part Number: UC2854 Dear all,
Our customer is trying to measure the leakage current between 16pin (GTDRV) and 1pin (GND).
Do you measure the leakage current between pin 1 and pin 16 when you evaluate the product?
If you are measuring, I would…
Part Number: UC2854 Hi team,
My customer has a question on the oscillator frequency.
In the datasheet, there is a min/max value that is given at T=[-40;+85degC].
Do we have a min/max value only at 25degC?
Thanks in advance for your feedback. …
