Hi Clinton,
Thank you for your reply.
please advice if possible to use the UCC28811 as it is significantly cheaper than TPS40211 ?
our intention to use with UCC28811 only the dc layout, can this ic be use only for dc to dc?
thanks,
Hello,
Does this need isolation? Is there a limitation on the overall LED stack voltage? Is there dimming involved? What is the power level? Is a two stage solution preferred or single?
Non-isolated I may consider PFC boost and then buck, boost using…
Other Parts Discussed in Thread: UCC28810 , UCC28811 Hi all ,
I am using UCC28810 as my buck flyback controller and i found an application note PMP2698 which is a 50 watt LED Driver , I made a PCB for it and it is work fine but there is a noisy sound from…
Other Parts Discussed in Thread: UCC28810 , UCC28811 , TPS92690 Hi All
I have a new LED luminary design. It is something like big projector. I have 96 pcs MK-R LED's and driving current is 400 mA. We are using 12 V model of MK-R LEDs'. A MCU will control…
For a 2-stage design you could use the UCC28810/UCC28811 for PFC/flyback followed by LM34xx DC/DC. The TPS92310 would work if you are ok with a single-stage design. You could also design a valley fill circuit for the UCC28700 to add some passive PFC. The challenge…
Other Parts Discussed in Thread: UCC28811 , LM3409HV Hello:
Our customer needs some way to control current through a very long LED string. It may have to handle up to 8A. They’ve been looking at switching supplies that could be used in current control mode…
Other Parts Discussed in Thread: UCC28810 Hello
I want to use the “ucc28810evm-002”to design my project, the project parameters are that :
Input voltage:160V~260V
Output voltage:300V
Output current can be adjusted form 0.1mA to 1A
I want to…
Hi Richard,
Thank you so much for your explanation.
Based on your description, the average current in L3 decides the LED current, i.e. I_L3 = I_LED / n, n is the T2 ration. and the peak current on R38 is 2 times of average current in L3.(correct?)
According…