Part Number: UCC28720 Other Parts Discussed in Thread: UCC28730 , UCC28C53 Tool/software: I'm trying to find a, preferably PSR, flyback converter that can handle
input from 15Vdc to 150Vdc
2 individually isolated outputs
and has a very low no-load…
Part Number: UCC28720 Hello,
We are looking at using UCC28720 in a buck regulator.
Does the Vs pin (pin 2) have to be connected to the output voltage in order to function properly?
What would happen if we left the Vs pin unconnected?
Would the…
Part Number: UCC28720 Hi,
We are using UCC28720 as per attached image below.
In few of the power supplies, we found Parts R91, R92 ( Current Sense resistors), U1 ( Switcher) , T1 ( Transistor connected to the switcher drive) and R2 ( Transistor Base…
Part Number: UCC28720 Hi,
At the top of page 19 of the datasheet, there is a formula that calculates Ls. Is the value of Ls critical? Can it be less than what is calculated? Because the value found is very high (8mH while transformers good for a similar…
Part Number: UCC28720 Other Parts Discussed in Thread: DRV110 Hi,
Can we use UCC28720 for constant current control application (example: solenoid control).
Is it possible to disable the voltage control loop and use only the current control loop.
Part Number: UCC28720 Hello,
I copied the reference design inside UCC28720 datasheet, including same part numbers for discrete. The design gives the expected output with no load connected, and when a 10 ohm load is added the voltage drops to zero…
Part Number: UCC28720 Other Parts Discussed in Thread: UCC28722 , UCC28880 , UCC28910 Can we design 5V, 0.5A isolated power supply module with this IC? If i try with TI Webench it shows that junction temperature lower than ambient temperature. Please…
Part Number: UCC28720 Customer wants to design a 5V 7.5W application referring the EVM.
Is it enough change that only current sense resistance is changed from 2.15 ohm to 1.56 ohm, using the same transformer with Lp=1.5 mH and turns ratio of 15.42:1…
Scott,
At this stage, is it possible for you to move on to a fresh untested board, and start from scratch with the BJT inserted correctly before first power up? This might just be quicker at this stage.
If not, then when you said that the CS resistor…
