Part Number: PMP41009 Other Parts Discussed in Thread: UCC28740 ,
Hello, I want to design a wide-range input flyback switching power supply with 120-1350VDC input, 24V output, and 40W output power, referring to the circuit in PMP41009. I would like you…
Part Number: UCC28740 Other Parts Discussed in Thread: PMP41009 Hello, respected experts. I have encountered a problem. I designed a wide - input - range flyback converter using the UCC28740 chip and the same two - transistor cascaded flyback topology…
Hello, I want to design a wide-range input flyback converter with an input voltage of 120-1300VDC and an output of 24VDC using a dual-switch cascaded flyback circuit like PMP41009. Are there any other chips that can meet this requirement besides UCC28740…
Part Number: UCC28740 Other Parts Discussed in Thread: PMP41009
Hello, I plan to use the UCC28740 chip to design a wide-range dual-transistor flyback converter with a structure similar to that of the PMP41009. Its specifications are as follows: output…
Other Parts Discussed in Thread: LM51770 The LM51770 will be damaged. Both the input and output voltages are within a reasonable range, but VCC shorts with other pins. I also designed it by referring to the design manual. The ISNSP and ISNSN pins on my side…
Part Number: BUF802 Hi, Team:
I used BUF802 in my design, V+ was connected to PP8V5，V- was connected to PN4V5. In datasheet input range spec. is 4.5Vpp@450MHz, what is range BUF802 support？ May input range set to 6Vpp？
Hello, my problem is that the duty cycle of my MOSFET is incorrect. My design requires it to work properly within the 85-900VAC input range, but the current duty cycle is too small. Adjusting the voltage feedback section has no effect; only changing the…
Thank you very much for your previous response. I will revise and further optimize my PCB design in accordance with your suggestions.
Meanwhile, for the purpose of systematic performance evaluation and characterization of the designed 1-GHz-class…
Part Number: LM139A Other Parts Discussed in Thread: LM239 , LM339 , LM2901B , LM339B , LM2901 Dear Madam/Sir,
For LM139AD, there have 3 questions from my side:
What is the output of LM139AD when input voltage higher than 30V&36V or lower than 2V? If it will…
感谢您的回复，再TRM里面找到这段话，
The input supply of DCDC can range from 2.2V to 3.8V. DCDC regulates the output to 1.5V. But for GLDO, the
supply can range from 1.71V to 3.8V to generate a regulated output of 1.5V. DCDC hardware is designed so
that when the supply…
