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ST Microelectronics – datasheet pdf

TL — Programmable Reference Voltage. As mentioned the biasing current should maximum of 5mA.

To bias a datasheeet we have to supply current to base pin, this current I B should be limited to 5mA. If you are designing a PCD or Perf board with this component then the following picture from the Datasheet will be useful to know its package type and dimensions. Complete Technical Details can be found at the datasheet give at the end of this page.


Submitted by admin on 30 August It can amplify power, voltage and current at different dahasheet. The value of this resistor R B can be calculated using below formulae.

A Transistors acts as an Amplifier when operating in Active Region. Of the above types common emitter type is the popular and mostly used configuration.

When uses as an Amplifier the DC current gain of the Transistor can be calculated by using the below formulae. When base current is removed the transistor becomes fully off, this stage is called as the Cut-off Region and the Base Emitter voltage could be around mV.

The maximum amount of current that could flow through the Collector pin is mA, hence we cannot connect loads that consume more than mA using this transistor. Anything more than 5mA will kill the Transistor; hence a resistor is always added in series with base pin.

ST Microelectronics

When this transistor is fully biased then it can allow a maximum of mA to flow across the collector and emitter. When a transistor is used as a switch it is operated in the Saturation and Cut-Off Region as explained above.


BC has a gain value of tothis value determines the amplification capacity of the transistor. BC is a NPN transistor hence the collector and emitter will be c54b7 open Reverse biased when the base pin is held at ground and will be closed Forward biased when a signal c547 provided to base pin.

As discussed a transistor will act as an Open switch during Forward Bias and as a Closed switch during Reverse Bias, this biasing can be achieved by supplying the required amount of current to the base pin.

The value of I B should not exceed mA. Amplifier modules like Audio amplifiers, signal Amplifier etc.