Does anybody make an IC that takes I2C command and outputs duty cycle (PWM)? I need to control bunch of TECs from CPU and I2C-> PWM seems the...

Does anybody make an IC that takes I2C command and outputs duty cycle (PWM)? I need to control bunch of TECs from CPU and I2C-> PWM seems the most efficient (and smallest) way to do it. Any suggestion will be appreciated. Thanks Michael

Seems like every time I start a new power design, I waste a bunch of time looking for the ideal PWM controller. At the end of the day I'd...

Seems like every time I start a new power design, I waste a bunch of time looking for the ideal PWM controller. At the end of the day I'd really like to have the simplest IC possible to handle just the PWM function, and I provide my own error amp, gate driver, and reference externally. The ideal part would look like this: oscillator set by resistor, comparator non-inverting input,

Gentlemen, Is it feasible to PWM a car starter motor or is there just too much reactance in them? TIA, CD

Gentlemen, Is it feasible to PWM a car starter motor or is there just too much reactance in them? TIA, CD

Can an RMS current clamp meter accurately measure the current of a PWM voltage? How else to measure PWM current without a shunt or direct...

Can an RMS current clamp meter accurately measure the current of a PWM voltage? How else to measure PWM current without a shunt or direct in-line meter? Thanks.

Hi all. I need a basic voltage mode PWM controller for a buck converter project. I need a wide duty cycle range, like 5 - 95%. I don't need an...

Hi all. I need a basic voltage mode PWM controller for a buck converter project. I need a wide duty cycle range, like 5 - 95%. I don't need an error-amp in the ic, since this part is placed elsewhere in my circuit. So, a basic Ramp generator and a PWM comparator, and an output stage. An UC3843 would suit if it were voltage controlled instead of current. I've gone through Fairchild, ONsemi we...

Hello, I am trying to simulate a buck and a boost converter using Christophe Basso's generic PWM models (in LTSpice) for voltage mode...

Hello, I am trying to simulate a buck and a boost converter using Christophe Basso's generic PWM models (in LTSpice) for voltage mode controlled and current mode controlled switched mode power supplies. These models have an integrated PWM generator and power switch. These models can be found here: http://cbasso.pagesperso-orange.fr/Downloads/IsSpice/Final%20models.zip (alternati...

Dear All, I am building a PWM Sine Wave Inverter using H-Bridge IGBT Configuration. The inverter has the following stages: 1. A Sine Wave...

Dear All, I am building a PWM Sine Wave Inverter using H-Bridge IGBT Configuration. The inverter has the following stages: 1. A Sine Wave Oscillator 2. An unity gain inverting amplifier to generate inverted sine wave 3. A Triangular wave generator 4. Two Sets of Comparators to generate PWM waveform for positive and negative cycles 5. Two Half Bridge IGBT Drivers to generate A and A' s...

I am just reading the first page of the "The x-Chapters" When I read the line: "PWM for dc motors - a myth demolished" a thought pop out of...

I am just reading the first page of the "The x-Chapters" When I read the line: "PWM for dc motors - a myth demolished" a thought pop out of my brain: There is something missing: The peltier element - how to avoid PWM and ripple. Fun with PIR sensors - what you should do and what not. The LM741 - please dont use it anymore. :-) Any other ideas for topics we realy need? Olaf ...

Follow up from the thread Oct 2019 Minimising EM noise from PWM switched fairly lights? Hi folks, Recap - this is an educational project...

Follow up from the thread Oct 2019 Minimising EM noise from PWM switched fairly lights? Hi folks, Recap - this is an educational project for my son to drive some existing garden LED fairy lights from a Raspberry Pi ZeroW The only problem, as fully expected, is they are chucking out more EMI than I'd like and I don't want to be causing problems for others. So - yes, it's a crappy co...

What are some good switching-mode LED drivers, able to work > 26V, regulate current at 30A (ext FETs), and do fast PWM for 3000:1 or...

What are some good switching-mode LED drivers, able to work > 26V, regulate current at 30A (ext FETs), and do fast PWM for 3000:1 or better dimming? We looked at MAX16819, what are some others you like? -- Thanks, - Win

Hi, I am experimenting with white LED COBs and wanted to power them from a constant current source while still having the PWM dimming...

Hi, I am experimenting with white LED COBs and wanted to power them from a constant current source while still having the PWM dimming capability. The current limiter should be located next to the diode and the lamp "interface" should be regular two wires. In other words, the current limiter should be capable of being powered from a +12V/open drain source with the PWM frequency of ~400H...

Hi ! I was planning on creating one motor controller for my crystalyte motor. Its three phase 1,5kw blcd motor. Can someone share ideas on...

Hi ! I was planning on creating one motor controller for my crystalyte motor. Its three phase 1,5kw blcd motor. Can someone share ideas on pwm design and or basic schematics ?

The eval kit is a whole $4.30 including shipping, and it comes 2nd day Fedex. > ...

The eval kit is a whole $4.30 including shipping, and it comes 2nd day Fedex. > http://e2e.ti.com/group/microcontrollerprojects/m/msp430microcontrollerprojects/609573.aspx The person coded the cordic, and then implemented the sine wave with PWM.

What's a good way to make a, say 2 or 3 GHz sinewave oscillator? I don't need extreme accuracy, and I'd like maybe 1 volt p-p. I was thinking...

What's a good way to make a, say 2 or 3 GHz sinewave oscillator? I don't need extreme accuracy, and I'd like maybe 1 volt p-p. I was thinking a cheap MMIC with PCB delay line feedback. MiniCircuits VCOs are around $20, which isn't bad. The output would go into a PWM modulator and then an AC-coupled communications channel.

It seems they took Win's circuit way too...

It seems they took Win's circuit way too carelessly: https://e2e.ti.com/blogs_/b/powerhouse/archive/2015/09/10/control-a-gan-half-bridge-power-stage- with-a-single-pwm-signal According to the schematic, they use SN75LVC2G14 as the Schmitt trigger. The datasheet says V_T+ is 2.2--3.7V (@5.5V), while V_T- is 1.4--2.5V and deltaV_T is 0.7--1.4V. This would be good enough for *some* deadtime i

Is it possible, perhaps using PWM, to slow down the action of a solenoid while still maintaining most of its force? By way of background, I'm...

Is it possible, perhaps using PWM, to slow down the action of a solenoid while still maintaining most of its force? By way of background, I'm considering a solenoid for pressing a rather firm button. The only one I have at present that can do so reliably is a 24V type that delivers its press too fast and too noisily. Lower voltage types (already owned or researched on ebay or Amazon) seem t...

I'm designing another 3-phase PM alternator simulator, and I need a roughly +-60 volt floating power supply. It will feed three PWM half-bridges...

I'm designing another 3-phase PM alternator simulator, and I need a roughly +-60 volt floating power supply. It will feed three PWM half-bridges to make the three output phases. Here's my first pass at the dc/dc thing. https://www.dropbox.com/s/bwt1vgbb2j94p1d/23S942_x1.jpg?raw=1 Those Coilcraft planar transformers are radical. 300 watts, surface mount, under a cubic inch. They have a ...

Hi, This year's project is to drive 3 strings of 30V DC LED outdoor fairy lights from Raspberry Pi's[1] I've been on here before last...

Hi, This year's project is to drive 3 strings of 30V DC LED outdoor fairy lights from Raspberry Pi's[1] I've been on here before last year and took some greet advice with respect to H-Bridges and found some, along with DC-DC converters that will enable me to interface a 30V DC supply to the Pi and the Pi back to the lights. The only thing I am mindful of is not to inadvertantl...

Hi all! I need simulation file for this IC. If someone has it, please share with me. I found here some files for UC3843, UC3842, but they...

Hi all! I need simulation file for this IC. If someone has it, please share with me. I found here some files for UC3843, UC3842, but they are current mode, and I want something with voltage mode for flyback converter, which has voltage regulated from 30V to 300V. So I will be gratefull for model UC3825 or information how to simulate in Pspice PWM modulator with Soft Start and limit max cur...

Hi, all, As part of the aforementioned cathodolumiescence system, I'm doing a bias supply for multipixel photon counters (MPPCs). MPPCs...

Hi, all, As part of the aforementioned cathodolumiescence system, I'm doing a bias supply for multipixel photon counters (MPPCs). MPPCs are extremely voltage sensitive--the gain of this one goes from ~0 to 2E6 between 52 and 55 volts' bias. (See .) Sooo, there's a bit of pressure to keep the bias very stab