buttonuf.blogg.se - Persamaan ic lm317

So if you are looking for a medium power NPN transistor in Plastic package then this Transistor might be the right choice for you. Due to this feature this transistor is widely used in amplifier applications. This reduces the cost of the Transistor and also since the package is not conductive it will not be affected by other noise in the circuit. It also has a very less saturation voltage (Base Emitter Voltage VBE) of only 5V, this makes it easy to use this IC in digital electronics which has an operating voltage of 5V.Īnother peculiar fact about this transistor is that it comes in plastic package, while most medium power transistor are available only in metal can package. The BD139 was originally manufactured by Phillips rated at 160MHz for specific audio applications, later they were cloned by other manufacturers like Samsung, ST etc.īeing a Medium Power NPN Transistor with a collector current of 1.5A this transistor can be used to control (On/Off) bigger loads that consume less than 1.5A. When base current is removed the transistor becomes fully off, this stage is called as the Cut-off Region. This stage is called Saturation Region and the typical voltage allowed across the Collector-Emitter (VCE) or Base-Emitter (VBE) could be 80V. When this transistor is fully biased then it can allow a maximum of 1.5A to flow across the collector and emitter. To bias a transistor we have to supply current to base pin, this current (IB) should be limited to 1/10th of the collector current and voltage across the base emitter pin should be 5V maximum. The maximum amount of current that could flow through the Collector pin is 1.5A, hence we cannot connect loads that consume more than 1.5A using this transistor.

TIP31C, SL100, S8050, BC547, 2N2222, 2N4401īD139 is a NPN transistor hence the collector and emitter will be left open (Reverse biased) when the base pin is held at ground and will be closed (Forward biased) when a signal is provided to base pinīD139 has a gain value of 40 to 160, this value determines the amplification capacity of the transistor.

Note: Complete Technical Details can be found at the BD139 transistor datasheet provided at the bottom of this page.

Emitter Base Breakdown Voltage (VBE) is 5V.

Collector-Emitter voltage (VCE) is 80 V.

Continuous Collector current (IC) is 1.5A.

Current Drains out through emitter, normally connected to groundĬurrent flows in through collector, normally connected to loadĬontrols the biasing of transistor, Used to turn ON or OFF the transistor. IC regulator tegangan variabel LM317 memiliki kemampuan mengalirkan arus maksimum sebesar 1,5 Ampere dan mampu memberikan tegangan output variabel dari 1,2 volt DC sampai dengan 37 volt DC.