UC3825 help with Pspice

Started by Waldes March 18, 2009
Hi all!
  I need simulation file for this IC. If someone has it, please share
with me. I found here some files for UC3843, UC3842, but they are
current mode, and I want something with voltage mode for flyback
converter, which has voltage regulated from 30V to 300V. So I will be
gratefull for model UC3825 or information how to simulate in Pspice
PWM modulator with Soft Start and limit max current.
 PS. Perhaps you know another driver, which I can use in my project
(flyback converter, Uo=30V-300V, Io=0.1A-0.2A, Poutmax=30W) and it's
easy for simulating  in Pspice? Thanks for all answers!
On 18 Mar., 12:19, Waldes <wal...@tlen.pl> wrote:
> Hi all! > =A0 I need simulation file for this IC. If someone has it, please share > with me. I found here some files for UC3843, UC3842, but they are > current mode, and I want something with voltage mode for flyback > converter, which has voltage regulated from 30V to 300V. So I will be > gratefull for model UC3825 or information how to simulate in Pspice > PWM modulator with Soft Start and limit max current. > =A0PS. Perhaps you know another driver, which I can use in my project > (flyback converter, Uo=3D30V-300V, Io=3D0.1A-0.2A, Poutmax=3D30W) and it'=
s
> easy for simulating =A0in Pspice? Thanks for all answers!
You can convert the model you have now from current mode to voltage mode by applying you own ramp voltage to the current sensing pin. Regards Klaus