2n3906 transistor led driver

Pricing and availability on millions of electronic components from digikey electronics. This transistor has only a gain value of 300, hence not suitable for amplifier circuits. This is where a pnp transistor differs from a npn transistor. I am trying to use one 2n3906 transistor as a switch. Free packages are available maximum ratings rating symbol value unit collector. The device is housed in the to92 package, which is designed for medium p. The circuit uses a 2n3904 npn transistor and a 2n3906 pnp transistor, which operate as a high gain amplifier. The pnp bipolar transistor is designed for use in linear and switching applications. A uc pin can easily drive an led at 20ma, but this will require 60ma which is outside. Buy your 2n3906 from an authorized nte electronics distributor. Acdc led drivers 53 dcdc led drivers 36 linear led drivers 55. The 2n3906 from multicomp pro is a through hole, pnp low power, silicon planar switching transistors in to92 metal can package.

I found the schematic below and have tried to recreate it with no success. An led driver is an electronic circuit that utilises a transistor to switch power to an led. I have a control signal that vary between 0v and 3,3 vdc at base, but the transitor not open. Your personal data will be used to support your experience throughout this website, to manage access to your account, and for other purposes described in our privacy policy. A brief discussion of transistors ranging from their history, what they are. The image below shows a 12v power supply but im actually using a led driver that is 9v and. Bc558 is a pnp transistor hence the collector and emitter will be closed forward biased when the base pin is held at ground and will be opened reverse biased when a signal is provided to base pin. Therefore, the current will be amplified by 100, which is 0. With the npn transistor in the circuit, amplification is usually to the degree of about 100 to 150. Lecture on npn 2n3904 and pnp 2n3906 transistor controlled electronics flashing led schematic. My load is 7 led flood lights connected in parallel.

Switch using 2n 3906 transistor all about circuits forums. The 2n3906 are a good general purpose pnp transistor for low power. If the led has a higher power requirement, then it is best to use an npn transistor as a. Simple twotransistor circuit lights leds electronicslab. The circuit uses a 2n3904 npn transistor and a 2n3906 pnp transistor, which operate as a highgain amplifier. Lecture on npn 2n3904 and pnp 2n3906 transistor controlled. The image below shows a 12v power supply but im actually using a led driver that is 9v and 900ma.