Here’s a 17 min. video describing the above in the title. It’s technical and somewhat complicated but calculates the power dissopated during switching. There are a lot of important details, such as the value of the gate resistor. I think I need to do a lot more studying about this topic.
Archive for the ‘SMPS DC-DC Converters’ Category:
2024-08-15 Apple Wireless Charger Was A Failure, Tesla’s Was A Success
Apple’s wireless charger would burn up when charging more that two devices.
2024-06-04 Gallium Nitride MOSFETs To Revolutionize Power Electronics
Gallium nitride power electronics will replace silicon and will make laptop power adapters smaller than a golf ball and will save major amounts of electricity. GaN devices will waste a lot less power, which will enable power electronics equipment to be made smaller and more efficient. Quote: “”GaN-based power electronics, on the other hand, could
(Read More…)
2024-03-22 USB Power Delivery Trigger Adapter
Some important information for those who wish to power their projects with a USB C “power delivery” adapter. You may need one of these. This is a YouTube short video.
2023-07-12 DC-DC Converters That Used Germanium Power Transistors
Me and my high school friend made a DC to DC converter that would give us 30 or so volts at a couple amps from a 12 volt battery. We used germanium power transistors which could not go much above 10 kHz. The Delco’s and the 2N458A’s were our favorites – we managed to push
(Read More…)
2023-06-08 The 12VDC, 1.5A Wall Wart Story
A month or so ago a guy posted a plea on the Facebook group that he had these pallets of these 12VDC, 1.5 amp switch mode wall warts and he was desperate to get rid of them or he would have to throw them in the trash. He said he would take any reasonable offer
(Read More…)
2021-06-12 Switch Mode Power Supply Items To Check
From FB group electronics parts Joshua E. Hrouda There also is a high value resistor from the rectified and filtered DC to the base of the power transistor. This can change value. After this resistor bootstraps the transistor into oscillation, there js a winding, a rectifier diode and filter capacitor that powers the base. Make
(Read More…)
2017-09-20 Use LM7805 To Charge Phone?
I posted this comment to FB Arduino group 2017-09-22. “Can I use a 7805 (regulator IC) to charge my cell phone?” The output is 5 volts, which is what the phone needs to charge. But the average smart phone will take more than 1 amp, up to 2 amps to charge quickly. The 7805 can’t
(Read More…)
2017-06-08 AD Has ADP5090
Ever since I’ve been experimenting with Joule Thiefs I’ve done so with the intention of using the circuit for boosting a low voltage source to power a higher voltage circuit. So I think this Analog Devices ADP5090 is very useful for doing just that: powering circuits up to 200 mW from very low voltage power
(Read More…)
2014-12-09 Power Bank Recharges USB Devices
I have been working on my own “Power Bank” for recharging my cell phone. I went to the NOCCC Computer Club meeting last Sunday and to the Mobile Computing meeting. Ben, who started this meeting, decided that he wanted to buy some ‘power bank’ USB chargers for himself, family and friends. He could’ve got then
(Read More…)
