# when a transistor is saturated the collector current is maximium

• Aug 05, 2019 · What is Transistor Saturation The term saturation refers to any system where the specification levels have attained the maximum value. A transistor may be said to be operating within its saturating area, when the current parameter reaches the maximum specified value.

• ## What is the difference between maximum collector current and

May 31, 2017 · Saturation collector current refers to the collector current value beyond which the relationship between the base and collector current is no longer linear (i.e. independent of the DC current gain beta). Maximum current generally refers to the current limit for safe operation of the transistor, beyond which the junction may break down.

• Saturation (in a transistor):  The state of a transistor at which the collector current has reached its maximum value for the present collector-emitter voltage, and cannot increase further by only increasing the base current I B.

• Aug 13, 2016 · At this point, the base current is maximum and so is the collector current. At saturation, collector-base junction no longer remains reverse biased and normal transistor action is lost. If base current is greater than I B (sat), then collector current cannot increase because collector-base junction is no longer reverse-biased.

• Aug 18, 2015 · Basically it is defined as the condition where Maximum possible values of Base current, Collector current(And hence Emitter current) courses through the transistor ckt. The maximum values encountered causes the Transistor to be in "Saturation". It is observed when Collector voltage drops below Voltage at Base. ie you either provide very large signal inputs at the Base or you have shorted Base and collector while providing an input at Base.

• Apr 20, 2011 · 2) When it is saturated the collector voltage will be about +0.6V so the 10k collector resistor will have 5.6V across it. 3) Then the max collector current in this circuit is 5.6V/10k= 0.56mA. The 10k resistor and the voltages in the circuit limit the active current to only 0.5mA, not the transistor.

• • ## How to Calculate the Collector Current, Ic, of a Transistor

The collector current, Ic, of a transistor is the amplified output current of a bipolar junction transistor. There are several ways to find the collector current, Ic, of a transistor. And it all depends on what information is already known about the transistor: 1st Way to Calculate Collector Current Ic. Using Known Values

• The absolute maximum section talks mostly about maximum voltage differences, and a single current limit – the collector current. I'm used to using these, and similar BJTs as saturated switches. And I get that once you have a base current that is sufficient that the Hfe causes the collector current to max out

• Collector Current Normal transistor action results in a collector-to-emitter current which is about 99% of the total current. The usual symbols used to express the transistor current relationships are shown. The proportionality β can take values in the range 20 to 200 and is not a constant even for a given transistor.

• Then the voltage sources are connected to an NPN transistor as shown. The Collector is connected to the supply voltage V CC via the load resistor, RL which also acts to limit the maximum current flowing through the device.

• Aug 13, 2016 · At this point, the base current is maximum and so is the collector current. At saturation, collector-base junction no longer remains reverse biased and normal transistor action is lost. If base current is greater than IB(sat), then collector current cannot increase because collector-base junction is no longer reverse-biased. (iii) Active region.

• ## Transistor Characteristic Curves | Electrical Academia

Also, if a transistor is conducting, but there is no internal resistance between C and E, this defines the maximum current that the collector can have (point B of the line). This maximum current can be found by dividing V CC by all the resistors in the loop (only R C in Figure 1).

• At this point, the base current is maximum and so is the collector current. At saturation, collector-base junction no longer remains reverse biased and normal transistor action is lost. If base current is greater than I B ( sat ), then collector current cannot increase because collector-base junction is no longer reverse-biased.

• Collector current. The maximum value for the collector current IC will be given by the manufacturer in amperes. Typical values for small signal transistors are 10s to 100s of mA, 10s of A for power transistors. Understand that this maximum figure assumes a saturated state (minimum collector-emitter voltage drop).

• When the BE junction is forward biased and there is enough base current to produce a maximum collector current the transistor is saturated. Equation 8 gives the formula for collector current when the device saturates. I C(sat) = (V CC – V CE(sat)) / R C (eq. 8)

• May 06, 2019 · 2. Saturation Region Here the transistor will be biased so that the maximum amount of base current is applied, resulting in maximum collector current resulting in the minimum collector emitter voltage drop which results in the depletion layer being as small as possible and maximum current flowing through the transistor. Therefore the transistor

• ## Transistor as a Switch – Using Transistor Switching

When maximum Collector current flows the transistor is said to be Saturated. The value of the Base resistor determines how much input voltage is required and corresponding Base current to switch the transistor fully “ON”. Transistor as a Switch Example No1

• Jan 09, 2020 · For this transistor, if the base current is allowed to exceed 1.67 mA, the collector current will exceed its maximum rating of 500 mA and the transistor will probably be destroyed. Q20. Fig. 11 shows the open circuit failures in a transistor.

• In many transistors, the base current can never reach a point where it causes damage because the emitter will blow long before it gets to that point. What actually destroys or limits the transistor is the emitter or collector current, not the base current. This transistor, for instance, has an Ic of 600 mA and a minimum Hfe of 20.

• As the emitter current Ie is the sum of a very small base current plus a very large collector current, the value of alpha (α), is very close to unity, and for a typical low-power signal transistor this value ranges from about 0.950 to 0.999

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