#2n3055 transistor mouser install#

#2n3055 transistor mouser install#

DonРІР‚в„ўt forget to install the transistor on a big heatsink.Р”В¬urrent Boosting Using an NPN Power Transistor (2N3055)Р”Р‡igure-2 shows the schematic diagram of the circuit. 1000uF, 10uF, and 100nF capacitors have used to reduce noises. As mentioned earlier, the 5K potentiometer defines the output voltage. 1N4007 is a protective diode and 270R resistor provides the necessary ADJ pinРІР‚в„ўs current. Based on this parameter, the power rate of the resistor must be calculated.

The 10R resistor defines the Turn-On time of the pass-transistor and by the way, it defines how much current should passe through the LM317 and MJ2955. This is an adjustable high current regulator circuit that the output voltage can be adjusted using a 5K potentiometer.Р”Р‡igure 1: LM317 current boosting circuit using MJ2955 This problem can be solved using a pass power transistor.Р”В¬urrent Boosting Using a PNP Power Transistor (MJ2955)Р”Р‡igure-1 shows the schematic diagram of the circuit. This information proves to us that this cheap 3-terminal device is suitable for many applications but it comes with a drawback for power applications and that is the limitation of the regulatorРІР‚в„ўs output current handling (1.5A in the best conditions). Overload protection remains functional even if the ADJUST terminal is disconnected.РІР‚Сњ It includes current limiting, thermal overload protection, and safe operating area protection. The device features a typical line regulation of 0.01% and a typical load regulation of 0.1%. It requires only two external resistors to set the output voltage. In this article, I will discuss two methods of LM317 current boosting, using power PNP and NPN pass transistors.Р”Р„ccording to the LM317 datasheet: РІР‚СљThe LM317 device is an adjustable three-terminal positive-voltage regulator capable of supplying more than 1.5 A over an output-voltage range of 1.25 V to 37 V. However, the chip can deliver currents up to 1.5A which is not enough for some power applications. The output voltage of the regulator can be adjusted from 1.25V to 35V. LM317 is one of the most popular adjustable regulator chips.