As shown by Equation 6, gate-drive losses do not all occur on the MOSFET. PDRV = VG _ DRV × QG(tot) × fS 2 × RGHI RGHI + RG + RGI + RGLO RGLO + RG + RGI where: (6) • PDRV is the total gate drive loss divided to calculate the ...
Equations 2 and 3 describe how to calculate the FOM-values. FOM (VGS ,VDS , I D ) = R(DS )ON (VGS , I D ) ⋅ QG (VGS ,VDS ) FOMsw(VGS ,VDS , I D ) = R(DS)ON (VGS , I D ) ⋅ Qsw (VDS ) (2) (3) Important: For the calculation only the same kind of ...
The best approach is to calculate the ON/OFF time of the transistor which yields maximum stable voltage across the output, meaning we need to make sure that the inductor is optimally switched such that it’s neither switched ON too quickly which might not allow it to discharge optimally, and...
Measuring the anode current takes a bit more math. No calculus though, just ohm's law. Before we calculate anything though, let's set some variables. The meter is 100uA full scale deflection, and we'd like to make it 3mA. Looks like we'll need a resistor! Take a look at [image ...
Summary of Parameters Used to Calculate Minimum Drive Strength for a Gate Driver Parameter Information source Example value Relationship VGS Desired gate-source voltage System parameter 12 V Higher values typically require higher current. QG,max Maximum gate charge at desired VGS Power switch data ...
I want to live without the aux winding. One less winding to calculate... Calculate what? It's just a ratio. In fact, it will be fine to use exactly the number of turns as your +/-12V windings! UC3842 requires at least 16V to start up but the transistor have a maximum Vgs of 20V...
All in all, we need to calculate the total power dissipation of LTC3350 to avoid exceeding the junction temperature. Same question in long: Using the LTC3350 and the NVMFS5C426NLWFT1G as top and bottom MOSFET which has a Qg of ~49 nC @ 5Vgs and having an output voltage of 24V...
All in all, we need to calculate the total power dissipation of LTC3350 to avoid exceeding the junction temperature. Same question in long: Using the LTC3350 and the NVMFS5C426NLWFT1G as top and bottom MOSFET which has a Qg of ~49 nC @ 5Vgs and having an output voltage of 24V...
All in all, we need to calculate the total power dissipation of LTC3350 to avoid exceeding the junction temperature. Same question in long: Using the LTC3350 and the NVMFS5C426NLWFT1G as top and bottom MOSFET which has a Qg of ~49 nC @ 5Vgs and having an output voltage of 24V and...