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You are right. But there is a space limit in my circuit. I dont want to use four inductor and two controller(LM25117) in my circuit . I prefer using two bigger inductor instead of using four smaller one.
So I must using external driver for two phase with LM25119. Would you help me with...
Thanks for reply,
After some searching I found LM25119 that is like LTC3858 but with higher gate current and better specifications. I use Webench designer for designing Synchronous buck with output current at about 50 ampere. but it cant by its regular schematic.
Can I use external mosfet...
LTC3858-1 can supply voltage higher than 8 volts .
But in simulation gate voltage swing from ground to 15 volts. I dont test it really . Do you test it and measuring the voltage range?
Regards,
Hi
I want to design the synchronous buck
Vin=14 volts to 35 volts
Vout=1 volts to 12 volts
Iout-max=50 ampere
Frequency=100 khz
I want to select the output inductor capable of passing through 50 amperes with the inductance about 1.5 uH.
Please help me about the core material and shape of...
If you run LTspice simulation , you can see that the gate-source voltage is about 15 volts.
LTC3858 Gate Driver specification
-----------------------------------------
Tr=25 ns
Cload=3300 pF
-----------------------------------------
So the maximum current is about
I=c*dV/dT...
The transition between the two gate voltage levels requires a certain amount of power to be dissipated in the loop between gate driver, gate resistors and power device.
The gate drivers has to be chosen according to the drive power required for a given power module.
The drive power is calculated...
Hi,
Which chip do you prefer for drivers? Does TC4427 is proper?
By removing totem pole it seems better, but in practice it needs mosfet driver.
The mosfet that I use is IPP08CN10L .
Gg=90 nc
td(on)=18 ns
tr=10 ns
Peak current for gate=90/28=3.21 Ampere
Is it true?
I using the 2-phase circuit...
Hi
I want to design the synchronous buck with LTC3858-1 with below specification
Vin=13 volts to 35 volts
Vout=1 volts to 12 volts
Iout-max=50 ampere
I want to modify the LTC3858-1.asc proper to my design. How can I modify this file for higher output power ?
Its the file of the modified...
Hi
I want to design half-bridge smps from 220 volts(AC) and with the output voltage at about 24 volts and 100 watt .
Vin=220 volts AC
Vout=24 volts DC
Pout=100 watt
I dont want to use more iron transformer for the supply voltage of the sg3525 and I want to use auxiliary winding for genetating...
Hi
I want to inject epoxy to the high voltage transformer in vacuum chamber . I want to put the transformer in the chamber and using vacuum pomp for vacate the chamber from bulb and air .I want to heat epoxy inside the chamber and make it harder . I do not know how much vacuum pressure and...
By some study I think full-bridge is better for this type of converter.the below picutrs is from "http://schmidt-walter-schaltnetzteile.de" so the full bridge is better with lower peak primary current .
Please give me your idea about full-bridge or half-bridge or other topology and your idea...
Hi
I want to design DC/DC converter with the below specification:
Vin=10 volts to 14 volts
Vout=12 volts to 36 volts
Iout(maximum)=30 Ampere
I can use non-isolated converter . Which is better for this smps? Non-isolated or isolated?
Which topology do you prefer for the converter with the...
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