cupoftea
Advanced Member level 5
Hi,
We wish to do a Buck converter for 12v to 5v at 1A.
We will use a Synch Buck with external fets and bootstrap drive (most controllers on the market are synchronous). But we wont fit the low side fet...just leave it as a diode.
We will then increase the value of the upper series gate resistor to reduce dv/dt at turn on and reduce radiated emissions. Roughly what kind of reduction in radiated emissions will we see?
As you know, we can not fit both fets as when upper fet turn on is delayed, we would get shoot through if lower fet was also fitted.
Why doesnt the LTC1624 datasheet show such a series resistor being used?
We wish to do a Buck converter for 12v to 5v at 1A.
We will use a Synch Buck with external fets and bootstrap drive (most controllers on the market are synchronous). But we wont fit the low side fet...just leave it as a diode.
We will then increase the value of the upper series gate resistor to reduce dv/dt at turn on and reduce radiated emissions. Roughly what kind of reduction in radiated emissions will we see?
As you know, we can not fit both fets as when upper fet turn on is delayed, we would get shoot through if lower fet was also fitted.
Why doesnt the LTC1624 datasheet show such a series resistor being used?
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