KSC945COTA

Series:	--
Packaging:	Tape & Box (TB)
Part Status:	Obsolete
Transistor Type:	NPN
Current - Collector (Ic) (Max):	150mA
Voltage - Collector Emitter Breakdown (Max):	50V
Vce Saturation (Max) @ Ib, Ic:	300mV @ 10mA, 100mA
Current - Collector Cutoff (Max):	100nA (ICBO)
DC Current Gain (hFE) (Min) @ Ic, Vce:	70 @ 1mA, 6V
Power - Max:	250mW
Frequency - Transition:	300MHz
Operating Temperature:	150°C (TJ)
Mounting Type:	Through Hole
Package / Case:	TO-226-3, TO-92-3 (TO-226AA) (Formed Leads)
Supplier Device Package:	TO-92-3
Base Part Number:	KSC945

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Introduction:

KSC945COTA is a high voltage, high current transistor array chip consisting of two transistors. It was developed by KSC Electronics, which is known for its expertise in small signal transistors and integrated circuits. It is a single transistor, bipolar junction transistor (BJT), and is a popular choice for applications that require large currents and high voltages. This article will provide an overview of the KSC945COTA application field and working principle.

Application Field:

The KSC945COTA is well suited for applications that require high voltages, such as motor control, switching power supplies, and medical equipment. Due to its high power capability and the absence of a voltage-control terminal, the KSC945COTA can be used for applications that require low-noise performance, such as radio receivers. The high current gain (hFE) of the KSC945COTA is suitable for driving heavy inductive loads, allowing for applications with higher power output. The chip also offers excellent linearity for digital control and pulse width modulation (PWM), making it suitable for audio amplification, radio frequency (RF) power devices, and digital signal processing (DSP) applications. In addition, the low power dissipation of the KSC945COTA makes it well suited for portable and handheld devices, as well as battery-powered applications.

Working Principle:

The KSC945COTA is a two-transistor array and is based on the bi-stable thyristor principle. The two transistors are arranged in a common emitter configuration, with the emitter of one transistor being connected to the base of the other transistor. The basic functionality of the KSC945COTA is to switch on and off. When the voltage on the base is increased to a predetermined level, the transistor will turn on, and when the voltage drops below this level, it will switch off again. This is referred to as the “bistable” mode of operation. When in this mode, the transistor will not turn on again until the voltage on the base is increased to a higher level than the one that turned it off. This mode of operation is especially useful for applications such as PWM, where high speed switching is required.The KSC945COTA can also be operated in other modes, such as the “Differential Mode” and the “Depletion Mode”. In the Differential Mode, current will flow from the base to the emitter when the voltage at the base is higher than the voltage at the emitter, and vice versa. This mode of operation is useful for applications such as audio amplification and current-switching power supplies. In the Depletion Mode, the current will flow from the base to the collector when the voltage at the base is lower than the voltage at the collector, and the current will be interrupted when the voltage at the base is higher than the voltage at the collector. This mode of operation is used in power-predominant applications, such as motor control and power regulation.

Conclusion:

The KSC945COTA is an excellent choice for a wide range of applications that require high voltages and currents. Its high power capability, low power dissipation, and various modes of operation make it suitable for a variety of applications, such as motor control, switching power supplies, and audio amplification. Its bi-stable mode of operation makes it especially well-suited for PWM and digital signal processing.

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