150W current source, with a current-mode switcher

Started by Winfield Hill in sci.electronics.design6 years ago 14 replies

Here's something for y'all to knaw on, a 150W current-source SMPS, made with a current-mode controller. It has external monitoring and...

Here's something for y'all to knaw on, a 150W current-source SMPS, made with a current-mode controller. It has external monitoring and programming with 0-to-5V signals. Most power supplies have low-Z voltage-source outputs, and when operated in current-limit mode they simply servo the voltage to the achieve the desired output current. A true current source has a low effective output capac...


a very tricky layout topology

Started by John Lee in sci.electronics.design10 years ago 10 replies

Hi, I am doing a mcu board. there are usb 2.0 high speed hub on the bottom and mcu analog circuits/dc-dc smps on the top layer. I want to do...

Hi, I am doing a mcu board. there are usb 2.0 high speed hub on the bottom and mcu analog circuits/dc-dc smps on the top layer. I want to do 4 layer top/gnd/pwr/bot but the usb 90/45ohm diff pair will be ruined because the diff pair trace is on the bot layer and the adjacent layer is pwr layer. Now I want to break the rule: partition the area underneath the usb hub circuits including the d...