Part Number: UCC28704 Other Parts Discussed in Thread: UCC24636 We are trying to design a AC to DC power generator design using the flyback controller UCC28704 IC. The simulation tool used is LTSpice which uses PSpice model files. Unfortunately, TI's…
Part Number: UCC28704 Hi,
Hope you are doing good.
We are trying to run the simulation model of ucc28704 based on the webench provided report.
The output is falling to zero and the VDD pin is reading 100V which is way too high from the datasheet.
I am…
Hi Ulrich, I received an update from the customer as follows:
Ulrich Goerke said: Also, please remove the leaded probe resistor from the VS node. This 1~2K resistor was used by the customer to isolate the probe capacitance from VS, but the resistor itself…
Part Number: UCC28704 Hi,
I designed a flyback converter with the UCC28704. I am using the transformer 750811613. The output of the converter should provide one output of 12V and 1 output of 5V while the auxiliary output should be 20V. Unfortunately, the…
Part Number: UCC28704 Hi,
I am working on flyback converter with the chip UCC28704. The chip turns-on well, producing 13V output. But a few msec later it sends pulses at 170kHz or more, with very short duty cycle, even though the max switching freq of…
Part Number: UCC28704 Customer is looking for a PSR flyback controller for their aux power. The input is from their PFC output, so the input voltage range might from 300V to 450V. Could you please help check whether UCC28704 or other better proposal can…
Part Number: UCC28704 Dear TI Experts,
Refer datasheet: SLUSCA8A –FEBRUARY 2016–REVISED FEBRUARY 2016)
I need to calculate the shortest Tdemag (time when the UCC28704 will sample the Vs pin after turn-off of MOSFET), refer datasheet Fig 14…
Part Number: UCC28704 Hi Team,
We would like to ask your help regarding the customer's inquiry below.
Background: I have used the UCC28704, but there is a problem: I need to reduce the impedance of the signal at Vs (pin 6), but I cannot do this because…
Part Number: UCC28704 Other Parts Discussed in Thread: PMP11600 I need support for UCC28704 based PMP11600 design. In the design I don't see any provision for over voltage protection for SMPS.
Do you have any reference which will help to turn off…
Part Number: UCC28704 Other Parts Discussed in Thread: UCC28700 , Hi team,
My customer is trying to simulate this part on PSpice for TI and it's not starting. Is there anything wrong with this? This is the default set up provided by PSpice for TI.