The Importance Of Current Sense Resistor In Switch Mode Power Supply

Current sense resistance is usually the way to change that part of the energy supply. Latest version of the video + b (speed) circuit also has this view of the current opposition. If the repair of electronic equipment, particularly to change the mode of supply, the current sense resistor is connected to pin feed fat (transistor field effect) and the other in Tierra Caliente. The value of the current sense resistance is around 0.1 ohm to 1 ohm. The values depend on the design of each source of energy. With the offer of the screen where the energy pulse width modulation (PWM) IC UC3842 used. Pin 3 of the force is called I-ic day forstand, which means that management and pin is connected to pin the source of power in bold. The aim of this course is the sense of power protection circuit. This circuit generally shows the voltage drop across a resistor in series with transistor switching Bold. If the current rises abnormally due to a short circuit in the secondary side, as a short-circuit or secondary diode-transistor output horizontal (hot), the tension was more of a baseline and the pulse generator which is the PWM IC. This circuit provides protection for components in case of problems. In some cases where overloading the power to move the framework of the measures and most elements have changed the fuse, the power Bold, PWM IC, Zener diode and current sense resistance. You know that a small change in the current sense resistor value have a major impact on the secondary production? A small change in the value of about 0.22 to 0.44 ohm ohms May caused his departure to the voltage drop in half! I saw many AC repairman can not detect this type of problem (voltage output) because they used analog or digital meters that do not have the range of low-ohms. You ca not distinguish low-ohm resistance has changed its normal value through meters. I personally use the Dick Smith Meter international search report which are able to see the value of 0.01 ohms! If you do not have this metro is possible that directly replace the current sense of strength to see if the secondary production generated return to normal stress. Another trick is that if the current direction of resistance to screen B + circuit has changed the value which caused the departure from power in the circuit to be low, and have a width of the screen and small Of course, the high voltage is too low. Instead of 24 kV, which is 15 18Kv. Jestin Yong is an electronic workshop and a writer. For more information on the repair of electronics, visit their website at http: / / www.noahtec.com / electronic-repair-articles.htm http://www.noahtec.com/electronic-repair Articles. htm