Hi babatundeawe thanks for your reply.I am using single conversionand the voltage i am using to inverting is 12V DC .Converting 12v to 250V AC Sine wave.From microocontroller to driver then to mosfet and the outputs from drains are connected to (12-0-12)V/250V (600W) Transformer
TLP250 is specified for minimum for minimum supply voltage of 10 V. You surely get more than 4.3 V output with 10 V supply, or something is very wrong with your circuit.Yes FVM as by your point how can i achieve 8v at the gate.The maximum voltage so far i got by TLP250 is 4.3V and by buffers after totem pole transistor configuration same result. Am i need to increase the power supply voltage for TLP250 so that can i achieve 8v ?
I thought you don't use any driver..But i am not using SG3524/25 .I am using SPWM signals from microcontroller
Isn't it in the datasheet. If not you will find a lot of application notes on driving mosfets on the IR.com pages.Any one will give me the right schematic for IR2110
Here high current pulses may cause problems when the lines are not short and wide enough. Low impedance.drivers in breadboard---->output to mosfets in PCB
As FvM said: Avg voltage makes no sense here.On measuring in Oscilloscope the signal level is 12V but Vavg is very low getting only 3 to 4v.
Hi KlausST,
For testing purpose i have everything separately built in PCB. Microcontroller in development board and mosfets in PCB . So in btw to drive the mosfets which already i have in PCB i am only using Buffer IC and TLP250 in breadboard.
From ucontroller signals to ----> drivers in breadboard---->output to mosfets in PCB
So where i am doing wrong ?
And yes u are right without load the logic level of microocntroller signal is 3V to 5V and after the driver stage the logic level is 12v.
On measuring in Oscilloscope the signal level is 12V but Vavg is very low getting only 3 to 4v.
But i am confused as FVM said to Fully ON mosfet only the high level matters.Then why i am having trouble in getting current not more than 3amp with 90W load
I don't understand how the circuit is related to the original SPWM problem. IR2110 is a bootstrap driver and doesn't work well for a pure highside switch.This is the circuit i tested and failed.
Hello , i know there are schematics in datasheet and in application notes.IR2110 gets hot and damaged in a fraction of secs when i connected to gate of the mosfet that is why still i am using TLP250. Because here IR2110 costs high thats why i am asking 100% tested working circuit
View attachment 117823
This is the circuit i tested and failed.
Does anyone know when should i have to go for IR2110 instead of using transistors or TLP250 or any mosfet driver ics.
Any advantages ??
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