mmitchell
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Hi,
In a load supply using P-MOS, the input to source is 25V. We found unfortunately that the MOSFET we chose and soldered has only 20V maximum gate-source voltage. Although there are voltage dividers consisting of R1 and R2, we are not sure upon the sudden turning on of NMOS, whether VGS could temporarily reach 25V, and whether the P-MOSFET Q1 could stand it.
We haven’t yet found MOSFETs having rated VGS>20V yet.
**broken link removed**
Questions:
1. Could someone recommend PMOS having larger maximum VGS?
2. The application of using PMOS for high voltage switch should be common and VCC=25V is unlikely to be at the high end of typical applications. So how do applications typically handle voltage exceeding maximum VGS?
Matt
In a load supply using P-MOS, the input to source is 25V. We found unfortunately that the MOSFET we chose and soldered has only 20V maximum gate-source voltage. Although there are voltage dividers consisting of R1 and R2, we are not sure upon the sudden turning on of NMOS, whether VGS could temporarily reach 25V, and whether the P-MOSFET Q1 could stand it.
We haven’t yet found MOSFETs having rated VGS>20V yet.
**broken link removed**
Questions:
1. Could someone recommend PMOS having larger maximum VGS?
2. The application of using PMOS for high voltage switch should be common and VCC=25V is unlikely to be at the high end of typical applications. So how do applications typically handle voltage exceeding maximum VGS?
Matt