PBRP123YT,215 Discrete Semiconductor Products

Resistor - Emitter Base (R2):	10 kOhms
Base Part Number:	PBRP123
Supplier Device Package:	TO-236AB (SOT23)
Package / Case:	TO-236-3, SC-59, SOT-23-3
Mounting Type:	Surface Mount
Power - Max:	250mW
Current - Collector Cutoff (Max):	500nA
Vce Saturation (Max) @ Ib, Ic:	750mV @ 6mA, 600mA
DC Current Gain (hFE) (Min) @ Ic, Vce:	230 @ 300mA, 5V
Series:	--
Resistor - Base (R1):	2.2 kOhms
Voltage - Collector Emitter Breakdown (Max):	40V
Current - Collector (Ic) (Max):	600mA
Transistor Type:	PNP - Pre-Biased
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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Introduction

This article will discuss the PBRP123YT,215 application field and working principle, which falls into the category of transistors-bipolar(BJT)-single, pre-biased. Bipolar transistor is usually used to amplify current or voltage and also to switch a load. It is known that biasing is one of very important need to consider before applying a bi-polar transistor circuit.

PBRP123YT

PBRP123YT is a series of pre-biased bipolar transistor produced by STMicroelectronics. It is the first device on the market offer the pre-biasing capability for the application of power efficiency. The pre-biasing is helpful to improve the start-up time and the manufacturing yield.

Application Field

PBRP123YT pre-biasing transistor has wide applications. It is mainly used to switch LED which requires current and voltage to light up. This device can also be applied to optical instrument, such as laser pointer, optical mouse and photo detectors, as controlling the optical signal. Furthermore, PBRP123YT can act as a transistor in the circuit of amplifiers, radio receivers and modulators. Additionally, in consumer products, such as radio, portable navigation, battery charger and solar powered energy, can also use this device.

Working Principle

The working principle of PBRP123YT consists of two main stages, namely dynamic and static. In the dynamic stage, the current flows from the collector to the emitter and a voltage appears across the collector and emitter. This voltage is varying by the applied signal and gives rise to the dynamic biasing. During the static stage, the collector-emitter voltage can be controlled to constrain the operating point at the required operating bias. This is done by the presetting of the base current.

Conclusion

In this article, we have discussed the PBRP123YT,215 application field and working principle. We learned that PBRP123YT is mainly used to switch LED which requires current and voltage to light up and can also be used to control an optical signal. Besides, we found that the working principle of this pre-biasing transistor consists of dynamic and static stages, while the dynamic stage is when the voltage is varying and the static stage is when the voltage is preset.

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