Hi team, Below is the question from a customer regarding soft start time of UCC2813-4-Q1 . Pls help to answer. "We are testing UCC2813-4-Q1 and do not observe the soft start function. PWM duty goes directly from 0% to almost 50% during start up. Any suggestions…
Yaita,
Here are some part numbers that appeared when I searched for your requirements. I recommend starting to look at UCC28600-Q1.
Part Number
TL2843B-Q1
UC2825A-Q1
UC2856-Q1
UC2856Q
UCC25706-Q1
UCC2813-0…
Hi Len,
The UCCx8C4x is an enhanced BiCMOS version with pin-for-pin compatibility to the industry standard UCx84xA family. There is a offline flyback design example in Section 9.2 in datasheet.
https://www.ti.com/lit/ds/symlink/ucc38c42.pdf
Below…
Hello Jerry,
The attached application note describes the differences between the UCC3800 family and the UCC3813. The UCC3804 is a member of the UCC3800 family of controllers.
Regards,
Mike
UCC3800-3813 Differences slua247.pdf
Part Number: UCC2813-0 Flyback Circuit - 02.21.24.pdf
I am having problems with what I think is overcurrent on the the IC that causes it to break down after some amount of time. I have broken the trace on my board and added a wire to measure the current…
Hi
(1) For the minimum VCC voltage, you need to make the VCC above UVLO_on. For UCC2813-0, the UVLO_on is 7.2 V.
(2) Here are differences for different part number from UCC2813-0 to UCC2813-5. They have different turn on voltage of UVLO.
(3) The…
Hi! OK I tried a couple of things.
First, I replaced C13 from 120uF to 200uF; it didn't seem to have any impact.
Next, I removed D5 and R3, and powered the UCC2813 from a benchtop supply (10V, current limited to 50mA). I applied AC and then powered…
Hi Jason
The UCC2813-2 has an internal clamp that tracks the UVLO turn-on level.
The UCC2813-2 needs to be powered through a series resistor which will limit the current into the Vcc pin and clamp circuit to less than 30mA.
The note 3, section,…
Hi Dexter,
UC2813 has the same pin configuration as the UC2842/3/4/5 family. there is a detailed section in the datasheet for finding the voltage feedback loop compensation. The section is 9.2.2.10, Voltage Feedback Compensation, on page 25 of the datasheet…
Part Number: UCC3804 Tool/software: WEBENCH® Design Tools HI Support,
I am developing a Power board with INPUT VOLTAGE:- 20-1000V OUTPUT VOLTAGE:- 12V @2amp
it is an isolated flyback converter.
I have gone through Webench design and selected the…
