Part Number: PMP20183 Other Parts Discussed in Thread: LM3481 Hello,
I was looking for a design to supply 180 V at low current, and PMP20183 topology looked like a good candidate. How can I tweak this design to bring the voltage down a bit? I think I…
Part Number: PMP20183 Hello,
I am unfamiliar with PMP20183 topology, but need a high voltage source running at low current, and this design seems to fit my needs. However, I would like to run it 10% lower than 200V (because of the max voltage of my photodiode…
Part Number: PMP20183 Other Parts Discussed in Thread: LM3481 , CSD19538Q3A , CSD17577Q3A Hello, I have implemented PMP20183 for the most part copying the schematic and layout except for modifying the R2,R100 and R3 according to post "PMP20183: PMP20183…
Part Number: LM3481 Other Parts Discussed in Thread: PMP20183
Hi
I want to confirm reason why PMP20183 will operate in DCM.
Is it correct that PMP20183 should operate in DCM because of IL < ΔILpp?
BestRegards
Hi,
Yes, you are right: the output power is the output voltage x the output current. However, in this ref design, the Po should be the boost stage output power, which also includes the power losses of the charge pump. As a quick estimate, use 50% as…
Part Number: LM3481 Other Parts Discussed in Thread: PMP20183 , Hi
We designed prototype board based on PMP20183 referring the following thread.
However, we found strange output ramp up at start up. Please check the following image.
It wont be happen…
Part Number: PMP20183 1. How to make the output HV is tunnable with the control of MCU(PWM for wxample)? The HV range is 50-200V, is tunable.
2 How to Inverting the Boost HV to -200V? I need a negtive HV output.
Thanks.
Part Number: LM3481 Hi,
I am considering the circuit of PMP 20183 using the LM 3481. I assume the following specifications. I calculated the peak current of the inductor (68 uH), but it flows about 1 A at the operating frequency 100 kHz. I want to change…
Hi Zhonghui,
I advise to take a look at the following reference designs and see if they can help.
https://www.ti.com/tool/PMP10077 - This reference design uses LM3478EVM, but the base level design should be the same. You will need to change the feedback…
Hello Gary,
Thanks for reaching out. The TPS40210 has a minimum Vin of 4.5V, therefore it is fine to use the PMP8621 reference design, you might want to leave the EN/DIS pin unconnected. Just in case, you can also have a look at this other reference design…
