![]() This is an adjustable high current regulator circuit that the output voltage can be adjusted using a 5K potentiometer. Current Boosting Using a PNP Power Transistor (MJ2955)įigure-1 shows the schematic diagram of the circuit. This problem can be solved using a pass power transistor. Overload protection remains functional even if the ADJUST terminal is disconnected.” 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). It includes current limiting, thermal overload protection, and safe operating area protection. Mouser offers inventory, pricing, & datasheets for NPN Bipolar Transistors - BJT. Features DC Current Gain hFE 2070 IC 4 Adc CollectorEmitter Saturation Voltage VCE(sat) 1. The device features a typical line regulation of 0.01% and a typical load regulation of 0.1%. Hi, On their 13.8V supplies, Astron used transistors with roughly 3-4x that voltage for the pass transistors C-E breakdown voltage. NPN Bipolar Transistors - BJT are available at Mouser Electronics. 2N3055/D 2N3055(NPN), MJ2955(PNP) Preferred Device Complementary Silicon Power Transistors Complementary silicon power transistors are designed for generalpurpose switching and amplifier applications. Modern '2N3055' are almost certainly made with the epitaxial process which generally produces a faster transistor (due to lower junction capacitance) but one that is also less robust. Help us improve our product data for Mouser Part 863-2N3055. ![]() It requires only two external resistors to set the output voltage. It's not just the TO-3 package that is obsolete, so is the double-diffusion fab process that made it. 2N3055 ON Semiconductor Bipolar Transistors - BJT BIP T03 NPN 15A 60V datasheet, inventory, & pricing. 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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