Part Number: PMP20745 I can not to find G094215LF transformer or equivalent from PMP20745 BOM. Where can to find this transformer for power supply design? Is there any distributor who can sale it in Russia? Please write to my email vasinrele@gmail.com
Hi Vishwanath,
The UCC28740 can also work. I checked and I do not see a reference design that supports your input/output requirements exactly. The closest I found is PMP20745 which is based on the LM5022.
One thing to watch is to make sure that the…
Part Number: LM5022 Other Parts Discussed in Thread: PMP20745 , At the beginning of input appearing, how to calculate the voltage on U1 pin 1? Thiis partly schematic was copied from one of your reference circuit, PMP20745.
Hi Massoud,
1. I have not evaluated the output capacitor ESR for stability. Since this regulates on the auxiliary winding voltage, increasing the value of C108 from 4.7uF to 10uF will improve stability.
2. I do not see mention on the schematic to ground…
Hi Anand,
Yes you need to protect VIN pin by adding an linear circuit (small but high voltage NPN and a ~12V Zener), like in the following ref design.
http://www.ti.com/tool/PMP20745
Thanks,
Youhao
Hi Maor,
Yes, changing R121 sets the UVLO.
R106 is used to limit the charging current in the bias supply capacitor C108 (C_VIN). The reason is to keep within the SOA (safe operating area) of the startup transistor Q100 at the maximum input voltage, and…
Hello Maor,
PMP7760 operated in DCM at lower load current and higher input voltage..
It operates in CCM at higher load current and lower input voltage.
You will exceed the maximum duty cycle operation at 12V input with this design. In this case you will…
Other Parts Discussed in Thread: PMP20745 , PMP9334 Dears:
There is a demand as follows:
1. DC-DC input is 18v~380v, output is 12V or 5V
2. Iout is 1.5A or 2A above.
I found the solution from reference design.
And from the PMP20745 datasheet I can see…
Hello Jean,
A search through our Reference Designs indicates that the LM5022 is used quite often for such a wide-range type of application. Although this part is originally targeted for boost and SEPIC applications, it is also widely used for isolated…
Part Number: PMP11236 Other Parts Discussed in Thread: UCC28881 , PMP20745 Hi dear TI Experts,
I want to use PMP11236 reference design for my project. I need to connect one of both 220V AC or 24V DC in the same plug(only one). Thats why I choose this part…
