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Most of the time I read datasheets of the parts and their application note, you are right, I should read more topic covering application notes. I can't refer to any application note about dv/dt reduction by gate driver, it is all based on my understanding. For the radiation, the LED strip is 5...
This is my schematic. And yes I know I don't need to be that fast at switching but I still wanted to learn how to choose rise and fall times. The 30ns fast transients at the drain of MOSFET may cause the meters long LED strip to radiate electromagnetic waves all around the room, maybe for...
I've heard that the rise or fall duration of MOSFET must be longer than resonant period of stray inductance and output capacitance. Output capacitance is given as 326pF in the datasheet. Best thing I can do for stray inductance is to guess, I guessed as 20nH considering the very small packages...
Thank you guys, I understood the logic and updated my calculations as below:
Ig_turnOn = 0.5667
RG_turnOn = 12.8824
Ig_turnOff =1.1333
RG_turnOff = 7.4118
Now I'm unsure of the selected rise and fall times. I know that rise time should be slow enough to let flyback diode block the reverse...
Hello, I haven't thought of adding a capacitor to the gate. I considered internal gate capacitance of the mosfet and external gate resistance as RC circuit. So all the C is coming from the existent gate-soruce capacitance + drain-gate capacitance. Is there a formula to calculate gate resistance...
I want to limit the rise and fall times of a MOSFET with a gate resistor to prevent large EMI. My calculation is as below:
In this calculation, I thought of a RC circuit at the gate in which the capacitor charges in 5 time constants. I found RG as 4.2ohm. I know this includes internal...
So that when the load is disconnected, there will still be a load for a brief time, this load will go lighter and lighter over time and give enough time to boost converter to adjust its duty cycle. The load I am talking about here is the second capacitor. Well this is enlightening thank you...
Thx to Klaus who deleted my schematic.
Anyway, the problem wasn't the inrush current. When a high current is drawn from boost converter, it needs to pull very high current from input. Either 2x2000 mAh parallel Lithium-ion batteries having hard time supplying that voltage or the boost converter...
Yes, buzzer draws 10 mA and I made billion test with it, no faulty yet.
Q3 is a P-MOS and Q2 is N-MOS which pulls the gate of P-MOS to ground in order to turn on the Q3. When Q3 is on the boost converter is powered.
Yes.
I have the circuit below: [moderator action: removed link to external file server] Now focus your attention on TP4056 charging and protection module because it has DW01A battery protection circuit in it which detects over current at 3A. Also focus your attention to SX1308 Boost converter which...
Hello, I've a TP4056 USB-C charging and battery protection module. There are two LEDs on the module, one of which shows if the battery is charging and the other one shows if the charging is done. I want to replace the LED which shows if the batteries are charging with a natural white 5050 LED...
Oh, I didn't know the order of the reading matters. Well, I' cant check it right now but if I do a test I will inform this thread.
I was joking about magic, anyway thanks..
I turn the pots, the leds blink rate is always same from the start, if I turn off and on the system then the blink rate updates for once, that's the only way.
I cared about it by pulling unused pins high with input pullup
LED is used in real circuit but the pots mission is not to set the blink...
Thank you for your concerns. First of all this is a test code, I don't care about the tidyness of the code or floating pins. I am building a system which must run with no supply for a year that's why I must turn off ADC, at least I must try it in the test code. I already apply internal pull up...
Hello, I've struggled for hours but I couldn't manage to succeed. I need a good coders help.
ATtiny24A demo program:
Requests:
There will be two potentiometers (ADC0 and ADC1) that is going to be read in an order for a single time, no constant conversions.
This is a power saved system so the...
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