ZTX712STOB

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Transistor Type:	PNP - Darlington
Current - Collector (Ic) (Max):	800mA
Voltage - Collector Emitter Breakdown (Max):	60V
Vce Saturation (Max) @ Ib, Ic:	1.25V @ 8mA, 800mA
Current - Collector Cutoff (Max):	100nA (ICBO)
DC Current Gain (hFE) (Min) @ Ic, Vce:	10000 @ 500mA, 5V
Power - Max:	1W
Frequency - Transition:	--
Operating Temperature:	-55°C ~ 200°C (TJ)
Mounting Type:	Through Hole
Package / Case:	E-Line-3, Formed Leads
Supplier Device Package:	E-Line (TO-92 compatible)
Base Part Number:	ZTX712

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ZTX712STOB Application Field and Working Principle

Introduction

The ZTX712STOB is a type of single bipolar junction transistor (BJT). It is among the most widely used types of active components in modern electronics, as they allow precise control of the current flowing through a circuit. They are mostly used in applications that require amplification or switching signals. In addition, BJTs can be used as logic level converters and current regulators.

Application Field

The ZTX712STOB is most commonly used in industrial applications and circuits involving amplified or switched signals. For example, BJTs can be used in both analog and digital circuits, allowing for the precise control of an output signal\'s amplitude and duration. In addition, BJTs can be used as logic level converters, allowing for the conversion between different logic levels.They can also be used in many other types of applications, such as audio amplifiers and pre-amplifiers, linear amplifiers, limiters, and oscillators. They are also widely used as constant current sources and current mirrors, as they can be used to monitor, detect and regulate electrical current within a circuit. Furthermore, BJTs can serve as transducers and temperature sensors in some circuits.

Working Principle

The working principle of the ZTX712STOB is based on the behavior of a traditional bipolar junction transistor (BJT) structure. This type of structure is composed of three terminal regions, known as the base, collector and emitter. The behavior of the BJT is determined by the voltage and current applied to these three terminals.

The Ebers-Moll Model

BJTs can be modelled using the Ebers-Moll model, which takes into account the current flowing through each of the three terminals. This model estimates the voltage drop and current flow through the BJT depending on the voltage and current applied to the base-emitter and collector-emitter junctions.

The Alpha and Beta Values

The Ebers-Moll model also takes into account the alpha and beta parameters of the BJT. The alpha and beta parameters dictate the gain of the BJT and the maximum current which can safely flow through the device. The higher the alpha or beta values, the higher the gain or maximum current of the BJT.

The Collector-Emitter Saturation Region

Finally, the Ebers-Moll model also accounts for the saturation region of the collector-emitter junction. When the collector-base voltage is too low, the BJT enters the saturation region, which limits the maximum current that can flow through the device.

Conclusion

In conclusion, the ZTX712STOB is a type of single bipolar junction transistor (BJT), and is used in many applications requiring the amplification or switching of signals. It can be modelled using the Ebers-Moll model, which takes into account the three-terminal structure of the BJT, as well as its alpha and beta values and the saturation region of the collector-emitter junction.

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