We provided 14V to the VDD pins using the other channel in our DC power supply and used an ARDUINO UNO alongside a voltage divider to give 2V to the FB pin and 5V to the COUNT pin. We created the circuit according to figure, connecting all the DRAIN pins together alongside a 10KOhm resistor and using our DC power supply (1st channel) to provide it with 30V.

We thought the source of our problem could be from VIPER37L, so we tried to test it according to the test circuit provided in the datasheet that we got from your official website. we tested every component individually before testing VIPER37 and simulated it using proteus (simulated the circuit till the inputs of VIPER37). In the circuit we only changed VIPER37HD to VIPER37L and the transformer to a one with a suitable frequency rating and did no other modification.Īccording to the changes I mentioned previously We made the circuit as shown in figure in the lab on PadBoard as shown in figure Īfter applying power to our circuit, we still did not get our desired outputs while measuring using multimeters. We also made 2 different transformers according to schematic that was given by eDesignSuite as shown belowĪfter we ordered all components, we made the circuit using VIPER37HD (SOIC -16) but our circuit did not work, after we did not get any desired outputs and after a lot of attempts and troubleshooting to solve this problem unfortunately the VIPER37HD(SOIC -16) we are using got damaged in the process so we tried to use another VIPER37HD(SOIC -16) but it turned out that the Vdd and Gnd pins it had were internally shorted (we tested it by using a multimeter while ensuring that nothing was connected to it), so we ordered another version of VIPER37 that is available in Turkey which is VIPER37L(DIP), but we noticed that this version of VIPER37 switches at a frequency of 60KHz, due to this reason we used a transformer that has a frequency rating of 60KHz. And to provide the power to the circuit we are designing we must make a multiple output SMPS power supply and after some searching, we found “eDesignSuite - Design, Circuit and Simulation Tools�? from STMicroelectronics.Īnd according to our need we have used your eDesignSuite - Design, Circuit and Simulation Tools and the tool gave us this circuit in figure (I also added the tools exported document with all parameters).Īnd as you see in figure the used converter is VIPER37HD, and we ordered it with the other components according to the schematic given in figure . We are working in a project that uses a lot of STMicroelectronics components like STM32MP1…etc. Project Name: MULTIPLE OUTPUTS SMPS USING VIPER37 CONVERTER

Viper smps design software