 Hello and welcome to this video, where I will introduce ST's Axelio Power Supply Solutions for iVoltage application. Let's take a look on the final applications where ordinary face-to-face 400V AC is not enough. These applications are working in fact with voltages up to 1 kV DC. A typical application is photovoltaics, the new trend of 1 kV DC bus brings challenges for electronics design to be able to work with this voltage. One of these blocks is the auxiliary power supply. Sometimes these parts get overlooked, but this block is in fact very critical. It provides the supply voltage for the control unit, gate driving, communications, etc. And also for safety functions, it means it must be 100% reliable. Another key market segment, where we can find auxiliary power supply, is i-power industrial applications. For i-power, the common tri-phase voltage is not enough, and it must be upgraded from 400V AC to 690V AC. This i-voltage level is bringing demands on the auxiliary functions that are supplied from this voltage bus, that is very high. And all the functional blocks inside such application need the power supply derived from this bus voltage. Let's take a look on our solution now. The topology of this board is a standard FLEBEC converter based on our PWM controller L6566BH. The most important parameter to note is very wide input voltage range from 230V AC up to 1 kV DC in output up to 24V and 100W. Our solution of such auxiliary power supply is able to work with 1 kV DC inputs thanks to features, which I will now show to you. The first feature I'd like to highlight is the i-voltage startup. The L6566BH controller has an integrated 840V startup circuit, but for 1 kV is not sufficient. Therefore, it is necessary to increase this i-voltage startup capability. We are using a small 600V external MOSFET, which work like a smart zener diode and keep the voltage on the controller at two-third value of input voltage. Thanks to this circuit we make 100% sure that the voltage on the controller will not exceed 670V. The second feature and most important is the power MOSFET because the voltage stress on the MOSFET in FLEBEC topology is obviously big. Here you can see an example of drain source voltage when input voltage is 1 kV. The voltage across the drain source of the MOSFET during switching is not only the input voltage, but is in fact a sum of several voltages. Input voltages reflect voltage, voltage spike caused by the leakage in the turns and last but not least the margin. So the total voltage seen by the MOSFET is 1,580V at an input of 1 kV. The solution in this case is to use a MOSFET with 1,700 breakdown voltage. For this we offer our K5 i-voltage MOSFET series. Estimac electronics is the leader in very i-voltage MOSFET. The K5 MOSFET series using ST proprietary MDMesh K5 superjunctions technology is including wide portfolio of i-voltage MOSFET in the range from 800V up to 1,700V. They offer an extremely good RDS on at very high drain source breakdown voltage and are perfect suitable for high switching frequencies. On the table you see only the selection of our top voltage rated devices. Thanks to these K5 series our customer can easily develop a robust design and avoid complicated solutions like cascade MOSFET, etc. If you want to find out more about our PWM controller and our outstanding MOSFET portfolio, please visit ST.com.