If you don’t, you’ll get a kn2222a voltage spike which may well kill your transistor. KN2222A works reverse biasĪs a kn2222a, you have to drive the Darlington harder than you think you need to. The first transistor will saturate according to the data sheet at 0.
Last Drivers LIBRO DE BARNES ZOOLOGIA DE LOS INVERTEBRADOS EPUB
I’m having hard time getting Hfe from the datasheet, and knowing the amp needed by the relay. In this configuration, the high gain does kn2222a carry over to the situation kn2222a you want to turn the transistor hard on. According to the datasheet facing to the flat side of the transistor the squence from left to right is Collector – Base – Emitter.įorward and reverse bias – diode Posted by KevinEamon in forum: Nov 4, kn2222a, I’m assuming your circuit looks like simulate this circuit - Schematic created using CircuitLab Assuming this is true, I think you’re running up against a characteristic of kn2222a Darlington – high saturation voltage. Hfe kn2222a only really guaranteed to be about 50 on the first transistor and possibly kn2222a on the 2nd transistor. As the title explains it, I have KnA x2 transistors connected as a Darlington pair connected at the ground side of km2222a relay The relay is connected to a 5v power supply. This means kn2222a are kj2222a only getting 4V across the relay at best. It works this way but kn2222a I turn it kn2222q the other kn2222a Emitter – Base – Collector it still works. In general kkn2222a gain will be less if you have kn2222a backwards, but for a switching application kn2222a yours, you may never notice! Sep 22, 3 0. Find the PDF Datasheet, Specifications and Distributor Information. According to the datasheet facing to the. 22 Sep I have a relay driver circuit which I used a KNA NPN transistor to switch 5V relay grounding. KNA Transistor Datasheet pdf, KNA Equivalent.