Part Number: UCC38C40 Tool/software: Hi,
I'm considering to use UCC38C40 in a DCDC flyback application where there is no need for isolation. The standard flyback circuit (when used in a off-line applicaiton) involves an opto-coupler for the feedback…
Part Number: UCC38C40 Other Parts Discussed in Thread: UCC24630 , Tool/software: Hello everyone, I need help with the implementation of a power supply using UCC38C40DR. It is a SMPS with a DC input voltage from 60V to 400 V and an output voltage equal…
Part Number: UCC38C40 Packages as XRAY.pdf sembled in Malaysia appear to be different than those assembled in Mexico. Please confirm if the part assembly based on X Ray pictures are correct.
Part Number: UCC38C40 Hello everyone,
I'd like to ask a question about the soft start schematic to be applied in the output pin of the UCC38C40. I found something about this in the "PRACTICAL CONSIDERATIONS IN CURRENT MODE POWER SUPPLIES", according…
Other Parts Discussed in Thread: UCC3803 , UCC38C40 Email from customer:
I am experiencing a problem with one of your components and I was hoping you could assist me with the issue.
I need a Current-Mode PWM Controller with a low start up threshold…
The 2nd question is about switching frequency. I found out that if I increase input voltage, the UCC38C40 would also increase its switching frequency. Like the pictures showing below, from the top to bottom, the first one is with input voltage 10.5V,…
Part Number: UCC24630 Other Parts Discussed in Thread: UCC38C40 , UCC28C40
Tool/software:
Hello everyone,
I am trying to test UCC24630 with a flyback operating with UCC38C40 on the primary side. It is a SMPS with a DC input voltage from 60V to 400…
Part Number: UCC24612 Other Parts Discussed in Thread: UCC38C40 , Hello everyone,
The problem is in the operation of the synchronous controlled rectifier using the IC UCC24612. The operating point is at 75V dc input and 12V output. The topology is flyback…
Hi John,
Thanks for letting me know. Is there any simple circuit of UCC38C40 to test the synchronization? The open loop circuit diagram on datasheet is way more complicated than that of UC3886, I am wondering is it possible to set up a simple circuit…
