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134 Threads found on edaboard.com: Power Mosfet Driver
Hi, I'm using an IRS 2117 high side mosfet driver connected in the circuit below 136448 Vcc is 15Vdc from a DC power supply Vbat is a square wave from a function generation And I attached a 470kohm resistor from Vbat_Vs to ground. I'm also using electrolytic caps. Probing Vbat_HO with respect to Vs, I can't seem to
You'd still need a driver to excite the RC tank and once you have a driver it's best to use it to drive the actual gate directly. Assuming the mosfet is switching power, you want a strong driver to limit time in the linear region. Though there are plenty of applications that use basic oscillator circuits (...)
Along with your 70cm of forward cable, you also probably have a similarly poor ground return. A generic power mosfet driver could certainly slap that load around, and this might help with duty cycle distortion (which in some logic families might come from the drive strength asymmetry of the outputs). But I'd first recommend looking at (...)
Hi, I need to drive N channel power mosfet. The current on the mosfet varies 0A to 9A and the frequency of the switch is approximately 6KHz. Also range of the Vdd is 16.8V-9.8V. As a microcontroller I am using MSP430G2553 which is worked at 3.3V but the driver can work at 3.3V or 5V. I am thinking to use IRF630 (...)
I am designing an inverter to convert +24 -24v to AC. my microcontroller is working with 3.3v. I don't know any proper FET driver, that its low voltage side works with 0 to 3.3 and its high voltage side works with -24 to +24. like this picture, anybody
I recommend letting the uC drive a power mosfet driver IC (best, through some buffering that can break any ground loops) which can be had at multiple amps of output drive and take 12V easily.
I am using UC 1708 driver (with capability 3A) at 15V to switch 2N6766 power mosfet (frequency 100kHz). Gate series resistor is 10E. There is a zener diode 1N759 and 4.7 k between gate and source of the mosfet . The gate transient current peak is 350 mA. What is limiting the gate current to 350mA, when 1708 can supply 3A?
Solid state relays with 10 A and higher current rating are widely available, look for hockey-puck-ssr. But did you consider that the voltage drop of a triac based relays will cause much power dissipation? Alternatively an AC capable mosfet based solid state relay could be used.
Hello, I've just discovered an interesting IC manufactured by Micrel. It's full-bridge mosfet driver with some great features: adaptive dead time control and shoot-through protection. I really want to use it to drive my s
You know that the IR2118 circuit is incomplete? Missing bootstrap diode and capacitor. Also the power circuit must be grounded.
What do you exactly mean with open circuit? Disconnected load or non-operational power switch? The latter will be determined by desaturation detector, the former won't.
hi,hellp me please How can you do driver this mosfet to switching? How can I make a high voltage pulser with using series power mosfet?(3kv pulser)
The lag in forward conversion of the power to driver may result in some overshoot on step turn on regulation under some conditions of low input V , high current load, unless current ramp soft start is used.
The problem is that logic drive power mosfets are triggered easily at 1.5V, this is close to the threshold voltage of the P mosfet in the driver which is around 1V. Even half a volt glitch triggers the power mosfet Why don?t you consider using a driver circuit (...)
I forgot to manged it. The load of the last oscilloscope photo are not the LED's but are resistors 3x6.8ohm in parallel. For now we can forget the LED's. I'm doing testing with resistors. However there will be approximately 70 LED connected to this dimmer. All connected in parallel (3.3V, 20mA). I believe it will be best to add one resistor in seri
I wonder which gate driver ICs you suggest for a buck converter with Nmosfet? TC4427 e.g. won't do. The isolated Infineon driver, yes, but only with a separate driver power supply. It must be a bootstrap driver to generate a gate voltage above Vin. And it needs an auxilary oscillator (...)
You can use IR2110 to drive the mosfets of a 100 or 150 kHz inverter. Please avoid cross postings and ask the wireless power transfer related questions in your own thread.
I suspect the feedback loop may not be working as expected. You may want to try the open loop circuit simulation first, break the loop and run the flyback at fixed duty cycle. This will help get identify the problem if any in power and feedback sense circuit. If this work, you can try closing the loop and see if simulation works. In lot of cases er
I'm trying to avoid an isolate power supply for the high-side switches (mosfet full bridge) so I came up to the only remaining options: bootstrap technique or a charge pump. The problem is that I need a powerful power supply as I'm going to use high current mosfet drivers (TC4452 - (...)
Almost all mosfets are power mosfets. You forgot to tell us the maximum current that you want in your mosfet. Most mosfets need a gate-source voltage of 10V to fully turn on (but 'logic-level" mosfets need only 5V) so you need a gate driver circuit to boost the 3.3V from (...)
Hello everyone, I am designing a Microcontroller based forward converter of following ratings Input 125VAC to 265VAC output 12VDC power 32 watts auxilary winding voltage 16V During startup , Microcontroller and mosfet driver IC will take power from the mains through bootstrap startup circuit , and in steady state , (...)
Hello guys i have a question for you.... how can i calculate the correct power dissipation of the IGBT switch in a boost converter (consider Vin max 40V e Imax 6A) ? Is right considering it about the same as the Pout? Please help me :| thank you
Hi I have already design a smps with L6699 (Half-bridge LLC) . I connect directly the gate of two mosfet to the HVG & LVG pin of L6699. The output power is about 400watt . Now I want to design new smps with the output power at about 2000 watts. I want to design one high side driver for high side mosfet. I (...)
Controlling power is best option instead of GND path....but if i am wrong, let me know why you are connecting/disconnecting GND's using mosfet's
Helo, Here I want to remove the IGBT and put a three phase mosfet bridge circuit. also want to use the same driver. what you say? Ajitkumar
To get current gain each stage is larger than its predecessor. How much, is your "taper factor". Best delay in long chains comes at about 3:1. But ultimate bandwidth wants a lesser factor (2:1) while area comes out better with a higher taper factor. Probably this all appears in the paper. Now, a power mosfet driver is a big (...)
Dear All.. Please help me to choice a chip driver mosfet eg TC4427 . IR2110.. or other..../. for suitable (power) with my circuit mini SSTC Half-Bridge (tesla coil) 100 watt at 100 volts Thank you so much. lam
i used the attached circuit with atmega 8 to drive dc buck converter and it was working very well , then i increased the input voltage on the drain to 20v and the input current was 4 A (from a power supply ) suddenly the output on Ho of IR2112 was zero when i removed the converter the output on Ho was 7.6 v dc constant when the volt on drain Vd was
You need isolation for the gate driver signal (e.g. by an optocoupler) and an isolated power supply. Or a level shifting driver designed specifically for the application.
Hi All, I have designed my Boost converter successfully. I want to drive the gate of my power mosfet at 60KHz. My controller is giving output from 0 to 3.3V. My question is How can i drive my Boost mosfet gate? mosfet gate requirement is, it should be given 0 to 12 pulsating voltage to operate in saturation. How can i (...)
I'm designing DC/DC converter for low power application of up to 50 Watt using mosfet half bridge configuration. mosfet will be supplied with 325V (dc) which I've to convert into 1.5v(min)-50 volts(max) at isolation step down transformer's secondary. Please suggest me gate driver ICs for 800V. plus any IC with inbulit (...)
I would use back to back mosfets for switching THE AC power. You could drive them via a pulse trafo, or a gate driver supplied from an isolated high side supply.
People are using "smart" power switches, mosfet drivers with built-in short circuit protection. It can't relieve you of checking maximum coil duty cycle when the continuous current is still within the driver's capabilities.
Refer to the datasheet, a high-side power supply is necessary. The example circuit uses bootstrap technique.
Just to be clear, you want to drive a mosfet with a transistor and then you DON'T want to drive it with a transistor? To answer your question, yes, you can drive a mosfet with a transistor. Do you have a more SPECIFIC question? Voltage? Speed? power?
I've gone a little outside my area of expertise in a section of a circuit I'm working on, and I'd be grateful for some advice. I need to boost the current drive of a voltage source to power an array of LEDs. Requirements for the circuit are: Input: range as needed, nominally 1V to 3V, frequency DC to 5MHz; high impedance (direct from DAC or wave
You can get the book Modern power Electronics and AC Drives: Bimal K. Bose. If you want to learn while simulating, go for MATLAB/Simulink demos.
Hi all, i have to start design the gate driver stage for a power mosfet. I am confused about how to choose number of stages of inverters and than finally how to size those individual stages. Any material that could really explain in detail about this, it would be great. Thanks
hey... iam trying to build dc_dc converter with tow mosfet so i must use ir2110 driver, i make the simple test circuit below with tow pwm signal 50% ,first i isolated the Vss and the com, i put the Vss ,Sd and the microcontroller at the same ground ,and i connect the COM with the power circuit ground, i connect the Vdd a
First of all check how much current is required for the FAN. Then choose a mosfet as a switch controlled by the microcontroller to give the power supply to the fan. Sometimes the mosfet might need an external driver, because of higher threshold voltage and if isolation is needed between mosfet and uC since (...)
Hi! I am trying to build a high power speed controller for a DC motor. I want to control the motor only to one direction. I decide to use a single mosfet with a mosfet driver as the following schematic
Regarding the design of the inverter, assuming that you're using a 50Hz transformer to step up, the stages are: PWM controller power mosfet driver stage power mosfet stage Output regulation / feedback stage Additional features - Battery low cut, overload protection, short-circuit protection, etc (...)
someone recommend me an alternative for TB6560, since it is difficult to get here in my country or is it better to use a microcontroller with Fets to drive a stepper ?
Your circuit involves both drawing and principle design faults. I guess, you meaned to connect the PMOS switch between 24V and VCC pin rather than make it short the power supply, distroying itself. If so, the PMOS switch has to be controlled by a 24V tolerant open drain/open collector driver, surely not an uP GPIO pin. Usually an external transi
You can, but it would need a decent amount of modifications. And to do those modifications, you should first acquire enough knowledge. eg. The mosfets - you would need to use 900V mosfets. You would need an input rectifier and filter stage, an auxiliary power supply, isolated feedback circuitry, etc.
LM4702 driver Based mosfet power images.ele
Have you tried removing C5 and PWM the voltage to the non-inverting input to the opamp rather than the power? You don't say what the opamp is, or the mosfet. Keith.
Dear atifsheikh Hi You can use an LM2577 ( boost converter driver which can be used for PFC ) But if you need higher powers , you can use an opto coupler and then a high power IGBT or mosfet to do that . Best Wishes Goldsmith
What do you use the IR2110 for? It's a mosfet driver. It's not hard to change from port D to port C in the code. Are you trying to make a PWM inverter, to drive a motor or make an AC power supply? Then that's a different matter and you need to give more explanation of your requirements.
An "RF driver" is just an amplifier. In order to reach the desired output power for the system, more than one gain stage is probably required. The power mosfet amp likely doesn't have sufficient gain, alone. Agreed, and sometimes you may have a pre-driver stage in there too. It is common to spread gain (...)