DTD113ZKT146 Discrete Semiconductor Products

Series:	--
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Transistor Type:	NPN - Pre-Biased
Current - Collector (Ic) (Max):	500mA
Voltage - Collector Emitter Breakdown (Max):	50V
Resistor - Base (R1):	1 kOhms
Resistor - Emitter Base (R2):	10 kOhms
DC Current Gain (hFE) (Min) @ Ic, Vce:	82 @ 50mA, 5V
Vce Saturation (Max) @ Ib, Ic:	300mV @ 2.5mA, 50mA
Current - Collector Cutoff (Max):	500nA
Frequency - Transition:	200MHz
Power - Max:	200mW
Mounting Type:	Surface Mount
Package / Case:	TO-236-3, SC-59, SOT-23-3
Supplier Device Package:	SMT3
Base Part Number:	DTD113

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Introduction

The DTD113ZKT146 is a pre-biased Bipolar Junction Transistor (BJT) used in various applications. The pre-biased transistor provides better performance and temperature stability in comparison with other BJTs operating without an external bias source. This article will discuss the application fields and working principle of the DTD113ZKT146.

Application Fields

The DTD113ZKT146 has two common application fields: switch mode power supplies (SMPS) and motor control. In SMPS applications, DTD113ZKT146 can be used in buck, flyback or other types of PWM controllers. The pre-biased transistor eliminates the need for external components such as resistors, capacitors, and voltage references. This results in a smaller circuit size and lower cost of the overall system. The pre-biased transistor also improves power dissipation and reduces EMI, thus allowing for improved control accuracy. The DTD113ZKT146 can also be used in motor control applications. The pre-biased transistor provides high-current drive capability that enables efficient control of the motor. The pre-biased transistor allows for higher switching frequencies, thus improving the overall system performance and reducing the motor’s energy consumption.

Working Principle

The DTD113ZKT146 utilizes the standard BJT architecture with an integrated resistor. The resistor is connected between the base and collector of the transistor, which provides the static internal bias voltage. This static bias voltage allows the DTD113ZKT146 to operate without any external bias source. When an electric signal is applied to the base terminal of the transistor, the electric current flows from the base to the emitter and into the integrated resistor. The resistor is then discharged; creating the necessary potential difference between the base and collector. This results in the transistor switching between saturation and cutoff and the current flowing through the collector. When the transistor is in saturation, the integrated resistor is charged again in preparation for the next switching cycle. This charging process ensures the operating points of the device remain constant and therefore prevents any unnecessary variations in the overall output.

Conclusion

The DTD113ZKT146 is a pre-biased Bipolar Junction Transistor that can be used in a variety of applications. It is commonly used in switch mode power supplies and motor control applications, where it can provide improved performance, temperature stability, and cost savings. The pre-biased transistor operates without any external bias source, and is switched between cutoff and saturation by an applied electric signal. The DTD113ZKT146’s integrated resistor provides constant operating points for the device, thus ensuring accurate and reliable control.

References

1. ABB Semiconductors. (2020). DTD113ZKT146. ABB Semiconductors. Available at: https://abbsbs.com/datasheets/transistors/dtd113zkt1462. Deepak, P. (2017). Pre-Biased Transistor (Pre-biased BJT). Electronic Components and Circuits. Available at: https://www.elprocus.com/pre-biased-transistor/3. Powers, C. (2015). Prebiased Transistors: Benefits and Selection Criteria. eeWeb. Available at: https://www.eeweb.com/profile/richardson-daniel/articles/prebiased-transistors-benefits-and-selection-criteria/

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