![]() This is an adjustable high current regulator circuit that the output voltage can be adjusted using a 5K potentiometer. It was launched by an American electronics company named RCA Corporation at the beginning of 1960 by using the hometaxial power transistor method. Features: DC Current Gain: hFE 20 70 IC 4A CollectorEmitter Saturation Voltage: VCE(sat) 1. svg format Premium quality Free for commercial use Free & easy download unlimit Update daily. Current Boosting Using a PNP Power Transistor (MJ2955)įigure-1 shows the schematic diagram of the circuit. The 2N3055 is an NPN power transistor, that is used in general-purpose applications. The 2N3055 is a silicon NPN transistor in a TO3 type case designed for general purpose switching and amplifier applications. Free download 2n3055 data sheet vectors files in editable. This problem can be solved using a pass power transistor. DC Current Gain hFE 2070 IC 4 Adc CollectorEmitter Saturation Voltage VCE(sat) 1. designed for generalpurpose switching and amplifier applications. 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 regulator’s output current handling (1.5A in the best conditions). Download 2N3055 datasheet from Central Semiconductor: pdf 65 kb : 115.000W Power NPN Metal Can Transistor. 2N3055, MJ2955 Preferred Device Complementary Silicon Power Transistors. Overload protection remains functional even if the ADJUST terminal is disconnected.” 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.Īccording to the LM317 datasheet: “The 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.
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