What does TIP120 do?

The TIP120 is an NPN Power Darlington Transistor. It can be used with an Arduino to drive motors, turn lights on, and drive other high power gadgets. The TIP120 acts as a power broker or gatekeeper between the Arduino realm and the high power realm composed of the PC fan and its battery pack.

Table of Contents

Which transistor should I buy?

Best Transistors: BJTs

#1 NPN – 2N3904. You can find most often NPN Transistors in low-side switch circuits.
#2 PNP – 2N3906. For high-side switch circuits, you need a PNP style BJT.
#3 Power – TIP120.
#4 N-Channel (Logic Level) – FQP30N06L.

How does a transistor enable a motor to turn?

Then to control the motor, you apply voltage to the transistor’s base. When there’s at least a 0.6V difference between the base and the emitter, the transistor will “turn on” — in other words, it’ll allow voltage and current to flow from the collector to the emitter.

What is the fastest switching transistor?

Feng and Hafez developed a transistor less than half a millionth of a metre long, with a maximum operating speed of 604 GHz, meaning it can carry out 604 billion operations every second.

How much current can transistor handle?

The diode only needs 0.6V to turn on, more voltage than that means more current. Some transistors may only be rated for a maximum of 10-100mA of current to flow through them. If you supply a current over the maximum rating, the transistor might blow up.

What is a TIP122?

The TIP122 is a Darlington pair NPN transistor. It functions like a normal NPN transistor, but since it has a Darlington pair inside it has a good collector current rating of about 5A and a gain of about 1000. It can also withstand about 100V across its collector- Emitter hence can be used to drive heavy loads.

How can I make my transistor faster?

Re: How can we make transistor switch faster So you are trying to discharge the capacitor (from -5V to -6V, I think in positive charge), by sucking the charge out via Q5 collector. You could try using a speed up capacitor to to the base of Q4 to reduce its Ic, so Q5 can handle the current faster.

How do transistors switch so fast?

Farther and faster “By grading the collector material to higher indium content, the mobility of the material increases, meaning the electrons can travel faster through the collector region,” Hafez told New Scientist.

How to use a tip120 transistor with Arduino?

Enter the TIP120 and its sidekicks. The TIP120 is an NPN Power Darlington Transistor. It can be used with an Arduino to drive motors, turn lights on, and drive other high power gadgets. The TIP120 acts as a power broker or gatekeeper between the Arduino realm and the high power realm composed of the PC fan and its battery pack.

What is the difference between tip125 and tip120?

In plate 1 illustrates the packaging and internal circuitry of the TIP120 and TIP125. They are known as a complimentary pair having the same electrical specifications but opposite semiconductor polarity. They are rated at 60V, 5A, and a DC gain (hfe) of 1000.

What is the DC current gain of a tip125?

They have a DC current gain (hfe) often over 1000. Instead of separate transistors both are combined in a single case and may include other components such as noise suppressor diodes and speedup resistors. In plate 1 illustrates the packaging and internal circuitry of the TIP120 and TIP125.

What is a good HFE for the tip120?

Q2’s gain of 100 can be multiplied by the gain of Q1 for a total hfe of 100,000. 2.2K is a good value to assure proper switching and limiting the Ib of the TIP120.