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Excatly Got you point.
Will try High side Current sensing as you suggested.
But for high side current sensing
do i have to use P channel mosfet and PNP transistor as per the circuit attached.
For high side current sensing, i have to use P Channel mosfet...??
and even i have tried circuit you sent with alteration. add 1.5K resistor to Transistor E and GND. but the problem is the same. Voltage across the mosfet is 1V
KlausST. can you please let me know why the voltage across the mosfet is 1.12V and not 0.25 as per the datasheet.
How did you make it that the volt across Mosfet would be 1V
As per what i have understood reading the datasheet is Pd is120 degree per watts.
but as per the stimulation you sent, the power consumption of mosfet is approx 116mW when in ON condition. So 120 Degree x 116mW which gives me 13.92 + 25 degree ambient temp which is approx 38.92.
but in actual...
i have gone through the stimulation you sent.
changing the dimmer resistor, also changes the duty cycle. but also will reduce the LED brightness. which i cannot.
For selecting this Mosfet AO3400, i considered the RDSon as it it quite low (33mohms)
because Using 220 Package was not possible because of the limitation of space in PCB.
Hi All.
I Am using a Constant current circuit (Attached) to drive the SMD LED's.
i am using Approx 750mA of Current to drive a LED's with 5V input which is working fine. Mosfet used is SMD SOT23 Package AO3400. My problem is the mosfet gets extremely hot around 70 to 75 degree Celsius within...
I agree with your point and would surely implement MOC3021 opto triac in place of pc817. I think using moc3021 circuit would be a easy part.
Actually in one of my project, where I have to control a single AC motor, I have used the same circuit which worked properly.
But again when I am using 2...
Hi all.
I am trying to control the 24 watts LED Bulb using a Triac and microcontroller. (Circuit Attached)
i am Using PC817 to control the triac On and OFF.
I am using 2 Triac to control 2 LED Bulbs. and to make it isolated i am using optocoupler PC817.
I have two buttons on circuit which are...
Hi all,
I am trying to crack water level sensor (DN-BLC) which are being used in Washing Machines. I have even gone through the videos of how the sensors works.
The video link shows how the sensor works and gives an output frequency as per the low or high air pressure which makes the change...
but the brake is applied only for 500mSec after every 8 to 10 seconds, so as i have checked, mosfets are not overheating, temperature is hardly upto 60 Degree. and if brakes are overheating, i am not concern because its not an electronically controlled part, its an external mechanical paart...
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