IR2104 240W Fluorescent tube Ballast Circuit. Work was designed an electronic ballast for starting six fluorescent lamps with a total output of 240W with integrated dimming-controlled analog input and button. Priority is set to control voltage. If the input voltage less than 0.5 V, tests with the push of a button. Measuring the voltage at…
UC3845 Lead–acid Battery SMPS Charger The board is designed as a superior power and a subordinate current regulation, which is powered from the main board. Voltage is sensed using a voltage divider directly on the output switching power supply. Current is sensed by current transformer TR2 and further streamed diode D20, and subsequently converted into…
Amplifier 4×60 Watts. To its solution was first selected integrated circuit LM3886T. The proposal continued the calculations and the election of the additional components of the integrated circuit and the design of printed circuit connections. To the end amplifier was also designed system of active cooling. In the fourth chapter was made the proposal of…
Self-oscillating switchmode power supply SMPS is used as a simple and cheap power source. Circuits that carry the architecture of the samokmitajících converters comprising, for example, resources for the charger of mobile phones or resources for power supply of data processing. It is therefore mainly of a low power applications (up to 100 W). Flyback…
100W Power Led Driver Circuit Select the suitable type of a power driver, if the lamp with LED of power about 100W supplied from a distribution network 230V. Compare the different options for solution driver. Build a simplified a mathematical model of the used LEDS and the simulation in the environment Matlab-Simulink UCC3813D UCC28180 An…
DC-DC Laboratory Power Supply 0-30V 0-3A LT1074 is a switching regulator type step-down (lowering) with a maximum current of 5 A. Can work with the value of the input voltage up to 60 V version (HV) and the output voltage can be set in the range of 2.5 V – 50 In. Without modifying the…
1KW PFC Circuit UC3855 for its function requires a dc supply voltage of 10 to 20V . His sampling is during normal operation of 17 to 25 ma. The integrated circuit additionally contains the input VCC zener diode of 20V. The maximum current for this diode is, however, only 20 mA [19]. Therefore, it is…
Adjustable Laboratory Power Supply SMPS design a lab power supply switching concept, which will work in kvazirezonancním fashion. The source should have one symmetrical output 0 to ±30 V / 5A (UCC28600) and one output single-ended +5V / 2A. (TOP243) Equipment opatrete digital indication of the output voltage and current and the electronic protection during…
UC2525 Designed smps switching power supply contains corrector pfc power factor and switching push-pull converter involved in a half-bridge. PFC The control circuit for the corrector power factor was chosen MC34262 The involvement of this circuit in the design corresponds to the wiring shown in the data sheet. During the operation of the control circuit…
NCP1380 fixed switching frequency of the driven circuit NCP1236 and changer using the effect of switching at a minimum voltage (valley switching) with the controller NCP1380. For the needs of comparison was designed a test board with NCP1380. Design resources comes from the 65 W adapter with controller NCP1236 described in the application note .…