Forums Search for: MOSFET
Old plasma screen Y_SUS anomalies
An older and poorly-documented plasma screen (LG 42PC3DV) apparently went 'pop' and developed dark screen. It had the usual bad 5V rail caps...
An older and poorly-documented plasma screen (LG 42PC3DV) apparently went 'pop' and developed dark screen. It had the usual bad 5V rail caps (x9) of the era (mfrd 6 months in 2006), and an overloaded -VY rail. I fixed those issues, to discover that Y_SUS waveform had no 'set-down' ramp. The mosfet generating that ramp can and does produce a -ramp, but only at the termination of the p...
Damn, burned out my 100-watt 50-ohm resistor!
A major meltdown last Friday for my 8ns 1kV SiC MOSFET pulser. After set of tests at 400V and 4MHz repetition rate, with everything working...
A major meltdown last Friday for my 8ns 1kV SiC MOSFET pulser. After set of tests at 400V and 4MHz repetition rate, with everything working fine, I had to increase the frequency. A loose hand slip and I was at 10MHz. That's when the smoke appeared. Blew out a 1-ohm gate resistor, both TO-247 MOSFETs, both 24V gate drivers, the flying regulator and the 150Mbps 50kV/us isolator, a...
Engineered crystals could help computers run on less power
Engineered crystals could help computers run on less power: https://www.sciencedaily.com/releases/2022/04/220408083839.htm Using negative...
Engineered crystals could help computers run on less power: https://www.sciencedaily.com/releases/2022/04/220408083839.htm Using negative capacitance in the isolaton layer MOSFET gates 30 % less voltage is needed for switching the MOSFETs The researchers found that a superlattice structure composed of three atomic layers of zirconium oxide sandwiched between two single atomic l
estimating junction temperature of a power mosfet
Hello I design an electronic load, using IXTK200N10L2 power mosfets (T0264 package). I try to estimate the junction temperature of the...
Hello I design an electronic load, using IXTK200N10L2 power mosfets (T0264 package). I try to estimate the junction temperature of the mosfets, using an IR camera to measure accessible temperatures. Mosfets are directly mounted on a air-forced heatsink (Theta-sa around 0.08?C/W), with thermal grease. With the camera, I can access the temperatures of : - the heatsink near the mos...
Trying to identify SMD with label scrubbed off - PWM, inverter, 100W 12VDC to 120VAC modified sine wave
I have a trick on-topic question, looking for possibilities for candidates for a 16-pin SMD device that has these pin outs identified so...
I have a trick on-topic question, looking for possibilities for candidates for a 16-pin SMD device that has these pin outs identified so far: 1 & 16 - RC oscillator 4 - ground 7 & 8 - drivers for a "H" style MOSFet set of four transistors that between them generate a modified sine wave running at 60Hz and 120V. So it is NOT a TI SG3524/3525 chip. The MOSFets generate the pow...
how to design PIN diode driver - high voltage and high speed
Now i need a high-power T-R switch that can switch state in two microseconds. Drive outputs: +12 volts(current ,0.5 ampers) , +700 volts ,...
Now i need a high-power T-R switch that can switch state in two microseconds. Drive outputs: +12 volts(current ,0.5 ampers) , +700 volts , -12volts(-0.5 ampers), -12 volts. Tx path may stand 600 watts (peak). I want to use PIN driver IC,but don't find IC that may output +700 volt. So i have to design the switch by myself. I am going to employ discrete MOSFET as driver . Input to the ...
RIS-797, programmable isolated current-source charge-pulser
The RIS-797 project is for an isolated, programmable current-source charge-pulser, using the op-amp MOSFET techniques analyzed in...
The RIS-797 project is for an isolated, programmable current-source charge-pulser, using the op-amp MOSFET techniques analyzed in x-Chapters 4x.26. This uses four 0.5pF isolator channels to run an I2C DAC and the current-source, including a range switch. Total output node capacitance to ground = 5pF, mostly due to DC-DC power-supply module. Two-terminal floating current sources...
low power, HV-in regulator with depletion mosfet
Version 4 SHEET 1 1888 724 WIRE 768 -64 688 -64 WIRE 816 -64 768 -64 WIRE 208 48 -112 48 WIRE 352 48 304 48 WIRE 448 48 352 48 WIRE 688 48...
Version 4 SHEET 1 1888 724 WIRE 768 -64 688 -64 WIRE 816 -64 768 -64 WIRE 208 48 -112 48 WIRE 352 48 304 48 WIRE 448 48 352 48 WIRE 688 48 688 -64 WIRE 688 48 528 48 WIRE 880 48 688 48 WIRE 1024 48 880 48 WIRE 1200 48 1024 48 WIRE 1392 48 1200 48 WIRE 1024 96 1024 48 WIRE 880 112 880 48 WIRE 1200 112 1200 48 WIRE 1392 112 1392 48 WIRE -112 160 -112 48 WIRE 1600 192 1440 192 WIRE...
