Part Number: UCC38C45 Other Parts Discussed in Thread: TL431 , Tool/software: I am using UCC38C45 to design a DCM Flyback converter. As you might be aware there is one pole and one zero in the Open Loop TF of DCM flyback (without TL431 and Opto-coupler…
Part Number: UCC38C45 Other Parts Discussed in Thread: UC3845 , Hi team,
When using UC3845 to test Flyback before, when the secondary output of Flyback is short-circuited, the Duty can be reduced, the Vcc pin voltage can be reduced, and UVLO can be…
Other Parts Discussed in Thread: UCC38C45 , UCC28C45 Hello,
I have designed a flyback power supply to work from 20V to 190V using UCC38C45 and my design has completed.
I the data sheet i have seen that it can work only from 0 to 70 degree centigrade…
Other Parts Discussed in Thread: UCC38C45 , UCC28C42 Hello,
I have designed a power supply in webench for input range 20-190VDC and 5V,1.5A DCoutput, using UCC38C45 Controller.
and i simulated the circuit in LT spice Using LT 1245(one to one Pin mapping…
Other Parts Discussed in Thread: UCC38C45 , UCC28C44 , UCC28C45 Hi everyone, I'm working on a 15W flyback transformer based on the ucc38c45 ( Input 24Vac/dc - output 15V, 1A max ). At present I'm looking for information, application note, which help me…
Other Parts Discussed in Thread: UC1845 , UCC38C45 Hi
I am working in a flyback PS running on DCM using UC1845 or UCC38C45 the compensation is done by directly modulating the comp pin source current FB pin is at 0V.
What is the slope of the linear…
Hi David,
Flyback topology is recommended for this spec. But generally it can achieves approximately15w~20w / inch^3 with 90Vac~265Vac input.
So it is almost impossible to meet your requirement of power density, especially the input voltage is so…
Anand,
On th eassumption that the 17 volts might drop I would recommend the UCC38C45
http://www.ti.com/lit/ds/symlink/ucc38c45.pdf
It is a flyback design and should be fairly simple to implement. With a 50% limitation on the duty cycle you…
Other Parts Discussed in Thread: UC3845A , UCC38C45 , UCC38C42 I need to have a soft start on my flback controller that utilizes the TI UC3845A. I see the newer BiCmos part UCC38C45 documentation (SLUA257)indicates an implementation with a PNP transistor…
