 Hello, please let me introduce STMic Electronics solution for 100W auxiliary power supply for industrial applications with a very wide input range up to 1000W. There are several markets and applications what are using high voltages for its operation like industrial drives, high power online UPS and also for example solar inverters. All of these are going above standard wall socket 230V AC input voltage range and also that implies specific need for an auxiliary power supply. Auxiliary power supply is a small but a critical block in the mentioned applications. In general, purpose of the auxiliary power supply is to provide a power for main electronics. It means for example 10-12V for power switches and gate drivers and 5 or 3.3V for a microcontroller. The auxiliary power supply is usually connected on different positions and voltage busses depending on an application. When we take previously mentioned application, solar inverter, the auxiliary power supply can be connected in front of the main converters directly after the photovoltaic panel to allow zero consumption during the night and safety at the same moment to make electronics alive when the grid fails for safe disconnection. Similarly, on big online UPS, the auxiliary power supply is also needed to work when grid falls and is connected to middle DC link. All of these examples need to have the auxiliary power supply connected to very high voltages. To cover these application needs, ST has developed a reference design STFL ISA 211V1. This 100 watt auxiliary power supply is an isolated flyback converter able to work from AC line 230V up to 690V or from DC line 150V up to 1000V. The output voltage is 24V, which allows usage of a standard downstream converter to any desired voltage needed in the application. The board has an extended flexibility and designer can select either quasi-resonant or fixed frequency operation and also is able to enable or disable brownout protection. This board is currently in manufacturing and there will be a stock of them in October 2020. This reference design is completely built on ST products starting from 1700V superjunction MOSFET from our K5 family, STW12 and 170K5, flyback controller L6566BH, output short grid out STPS 20 LCD 200C, 600W MOSFET STN1 HNK60 used in a high voltage startup circuitry, TL431 voltage reference and STTH112 plus 1.5KE350A directifiers without working as a peak clamp. A key factor of this solution is a voltage rating. Here I would like to explain why the 1700V switch is needed. The breakdown voltage rating of the main MOSFET is defined by a maximum voltage appearing between MOSFET's drain and source. Due to flyback operation it consists of several contributors. First, it is the maximum input voltage 1000V in our case plus the reflected voltage defined by transformer strength ratio being from 50 to 200V typically plus voltage spike caused by the leakage inductance also typically between 50 and 200V plus finally some safety margin being recommended between 10 to 30%. All the sum leads us to 1700V for safe and reliable operation in a harsh industrial environment. Other highlight of this reference design is a solution for a high voltage startup unit. Despite the controller L6566BH as an embedded startup of 840V it is still not sufficient. This is why we have used a special circuitry. Here there is implemented MOSFET Q1 what is the 600V MOSFET STN1 HNK60 which is used together with a small zener diode to extend the startup voltage even up to 1200V. Then each of the main capacitors C1, 2 and 3 with its related balancing resistors are then holding one-third of a total input voltage. We have made an extensive testing on this reference design to demonstrate all the corner conditions and behavior. The MOSFET STN1 HNK60 is an efficiency graph based on a different input voltages from 230V AC what is the blue line, 400V AC green line, 600V AC purple line and finally the highest voltage 1000V DC yellow line. It can be seen that full power efficiency it means and the load is 100V is above 86% at all the conditions. What is worth also to mention is the peak efficiency for most common voltage 400V AC and it was reached 88%. SD Microelectronics is offering cellular technologies for high voltage MOSFETs. This reference design is an ideal test vehicle to see the comparison between the switches considering all being 1700V maximum breakdown voltage. We have tested the matcher planar technology represented by SDW3N170, then we have used the superjunction MOSFET, SDW12N170K5 what shows us gain of 4% efficiency over the planar technology and on top there is also the most advanced technology of today, silicon carbide MOSFET, SDW12N170K5 what is giving us even another percent of the efficiency over the superjunction device. In a remaining time I would like to share a summary on a key power product families from SD Microelectronics what can help engineers and designers to build a robust and efficient switch mode power supplies. Well 6566BH is a multi-mode flyback controller with a selectable operation. It can work either as a fixed frequency or quasi resonant controller. It has an integrated high voltage startup of 840V. It has an advanced light load management for an effective standby operation and several other protections like an adaptive under voltage lockout, line feed forward for constant power capability versus mains voltage change, pulse by pulse over current, over voltage and overload protection, brownout and transformer saturation protection. On top there is also a programmable frequency modulation to help with a reduction of EMI. L6566BH is coming in a 16 pin narrow package SO16. Superjunction MDMeshK5 MOSFET series is a one-stop shop family for very high voltage MOSFETs. It offers the most complete portfolio from 800V up to 1700V breakdown voltage, targeting mainly flyback topologies. Higher breakdown voltage allows a higher design flexibility and margin together with industrial lowest RDS zone for above 1000V switches to have higher power and greater efficiency. Lowest total gate charge QG gives faster and more efficient switching. Last but not least low input and output capacitances CISS and COSS lower significantly the switching and arqueostics. ST also offers a broad portfolio of rectifiers. Low voltage diodes below 200V with third and STPS series are having avalanche capability defined, higher temperature rating of 175 degrees Celsius and low forward voltage drop. High voltage silicon diodes are covering voltages from 200V up to 1200V range with a platinum doping for low leakage and higher reliability, again with 175 degrees Celsius rating. ST is already 10 years in production with silicon carbide devices ranging from 650V to 1200V devices with high robustness and low forward drop devices. Here I would like to thank you for listening this presentation of ST Microliteronics.