Part Number: UCC28250 Hı team i did not understand some things in pre biased operation
For example
1-) Is it necessary to apply voltage to the pre bias outputs along with the input voltage to start the controller? Cant the controller work without an pre…
Part Number: UCC28250 Other Parts Discussed in Thread: LM5046 , UCC28951 Dear Team,
Does this chip can be used in resonant mode ? If yes, do you have any technical articles about it ? Since as far as I know, for resonant mode i would need phase shifted…
Part Number: UCC28250 Other Parts Discussed in Thread: UC3842 , UCC28251 Dear Support Team,
We use the UCC28250 as a PWM controller for an isolated full-bridge 44V -> 12V. The controller is configured for primary side control with voltage feedforward…
Part Number: UCC28250 Hi team,
it seems that we met a bug on using our EN_pin to enable and disable the device:
it would work well if we put over 2.25V on EN_pin to enable the device;
but if we put 2.2v on En_pin, it seems that the device would work…
Part Number: UCC28250 Hello,
I am developing an ac/dc converter using UCC28250.
It is used as secondary side control, and the topology applies full bridge.
I am developing 3kW, and even if I load only 0.1A,
the heat rises close to 70 degrees in the UCC28250…
Part Number: UCC28250 Hello
We developing a rectifier that varies the output voltage from 30V to 200V.
It is currently configured with secondary side control.
In this case, I am curious about how to set the VSENSE Pin.
The output is varied by receiving…
Part Number: UCC28250 We used UCC28250 as the full bridge controller in a non-isolated DC/DC converter. Input voltage is 70Vdc, output voltage is 5.72Vdc.
Normal primary MOSFET on time is 1.5us, abnormal primary MOSFET on time can be 3us.
Pls check…
I tried several different combinations of resistors including the 100 Kohm, it's not working for me. Please note that I am using UCC28251 instead of UCC28250.
Part Number: UCC28250 Other Parts Discussed in Thread: PMP8878 Dear all,
How the switching frequency of PMP8878 is decided as 200KHz?. what are the parameters which limits the switching frequency?. What will happen if we the switching frequency doubled…
Part Number: UCC28250 Other Parts Discussed in Thread: UCC28950 Hi,
The application circuit in the datasheet shows an implementation of a voltage mode control converter. If I want to make a current mode converter controlled from the primary side, how should…