Como Funciona a Fonte de Corrente Constante.

COURSES TAUGHT BY PROFESSOR VALDENILTON: Basic Electronics Course Levels 1 and 2 Online (100% VIDEO) https://go.hotmart.com/S90922297H?dp=1 LCD/LED Digital TV Repair Course (100% PDF) https://technologycursos.wixsite.com/... Transformer Winding Course (100% PDF) https://hotm.art/Curso-de-enrolamento... COURSES TAUGHT BY OTHER PROFESSORS: Basic Electronics Course (focused on repair) https://hotm.art/Curso-de-eletronica-... Basic Electronics Course (focused on repair) (general) https://hotm.art/Curso-de-eletronica-... Cell Phone Repair Course (version 5.0) https://hotm.art/Conserto-de-celular-top Laptop Motherboard Repair Course https://hotm.art/Conserto-de-placa-ma... Voltage Inverter Manufacturing and Repair Course https://hotm.art/Aprenda-a-fazer-inve... Photovoltaic Solar Energy Course https://hotm.art/Curso-energia-solar-... Complete Digital Marketing Course (from scratch) https://hotm.art/Curso-de-Marketing-D... In this video, you will learn how a constant current source with a bipolar junction transistor works. (TBJ). It is known that the transistor performs three functions in electronics: a) Signal amplifier; b) Electronic switch; c) Current source. Several electronic devices use a constant current source in their circuits to maintain stable current consumption. The transistor, as a constant current source, performs two simultaneous functions: a) Prevents input voltage (Vi) variations from being applied to the load (circuit); b) Prevents the load current (IL) from continuing to rise, limiting this current to a fixed level. A basic constant current source circuit consists of a transistor and a voltage stabilizer circuit. HOW THE TRANSISTOR WORKS AS A CONSTANT CURRENT SOURCE (IN RELATION TO INPUT VOLTAGE VARIATION): When the input voltage rises, the Zener diode voltage, along with the transistor's base-emitter voltage, remains stable. This way, the transistor doesn't leave the quiescent point (Q), and the emitter output voltage remains stable, keeping the load voltage unchanged. The excess voltage then remains in the collector/emitter region of the transistor, which, since it doesn't consume it, ends up transforming it into heat and transferring it to the heat sink. HOW THE TRANSISTOR WORKS AS A CONSTANT CURRENT SOURCE (IN RELATION TO THE VARIATION OF THE LOAD'S CONSUMPTION CURRENT): When the load's consumption current increases, the emitter, collector, and input currents also increase. This causes the current flowing through the voltage stabilizer circuit to decrease, thus decreasing the transistor's base current. The decrease in the transistor's base current causes the collector current to decrease. Thus, the transistor's collector current, which was increasing, stabilizes again, keeping the load current stable. I hope that by the end of this video, you will be able to analyze the transistor as a constant current source so you can accurately diagnose electronic equipment boards. VIDEOS TO COMPLEMENT YOUR STUDY: BIPOLAR TRANSISTOR LOAD LINE    • Como medir o ganho DC (hFE) do transistor ...   SHARE THIS VIDEO WITH YOUR FRIENDS:    • Como Funciona a Fonte de Corrente Constante.   SUBSCRIBE TO OUR CHANNEL BY CLICKING THE LINK BELOW:    / @technologycursosoficial   Hello, I'm Professor Valdenilton, Technical Coordinator of the Electronics courses offered by Technology Cursos. I love transforming people's lives through teaching. My goal is to teach people like you how to repair the electronics you love, helping in any way possible. INFORMATION: Our Website: https://technologycursos.wix.com/tech... Business Contact: [email protected] WhatsApp Center: (82) 9 8706-9200 COME SAY HI ON MY SOCIAL MEDIA: Instagram:   / technologycursos   Facebook:   / technologycursos