“Is this MOSFET’s SOA (safe operating area) adequate for my application?” This is the most frequently asked question by designers of hot swap circuits. When evaluating a MOSFET’s suitability for a spe
Several different avalanche ratings are explained and their usefulness and limitations in design is considered. Avalanche Mode Defined All semiconductor devices are rated for a certain max. reverse voltage (BVDSS for power MOSFETs). Operation above this threshold will cause high electric fields in ...
As I explained previously , I have a voltage across a 5000uF capacitor as the compliance voltage. I was being very careful , so I removed the connecting wire from the rectifier output to the +Cap and charged the capacitor to 55Vdc via a variable resistor and removed the input. The expect...
This is explained in more detail in the next section. Zeners are frequently used "to protect the gate from transients". Unfortunately they also contribute to oscillations and have been known to cause device failures. A transient can get to the gate from the drive side or from the drain ...
(SOA) during the shutdown, both gate signals must be synchronized precisely as to time and absolute values. Interferences in the correlation of gate signals will reduce the operating area, and the component can easily be destroyed. Because a considerably more involved driver electronics is ...
the gate voltage, suggesting that there is The generation of flicker noise can be explained by the carrier number fluctuation or the mobility fluctua- ttpntwThbeiileahooohmoniennsetsApdti,rH4eem9cee,wdo.SocrgphaFboIotmDltioorsgyuc/deigrehrsIrpieDennpvtrti,h2geshaooidenrfiecptoasordogoieml...
“Is this MOSFET’s SOA (safe operating area) adequate for my application?” This is the most frequently asked question by designers of hot swap circuits. When evaluating a MOSFET’s suitability for a spe
An SOAtherm simulation of this circuit predicts a junction temperature rise of 40°C, including a case temperature rise of 30°C. The larger case temperature rise is explained by the smaller size of the powerPAK-SO8 package (and correspon...
An SOAtherm simulation of this circuit predicts a junction temperature rise of 40°C, including a case temperature rise of 30°C. The larger case temperature rise is explained by the smaller size of the powerPAK-SO8 package (and correspondingly l...
Detailed MOSFET Turn-On and Turn-Off processes can be explained with the help of Figure 3a,b (Turn-On) and Figure 3c,d (Turn-Off). MOSFET Turn-On using a photocell can be simplified as the Ciss charging with a constant current, Isc. Two terms are clearly identified, 𝑡𝑑𝑂𝑛...