What is STT818B?
This is HIGH GAIN LOW VOLTAGE PNP POWER TRANSISTOR. A PNP transistor is a type of bipolar junction transistor (BJT) with a different structure and polarity compared to an NPN transistor. |
[PDF] Complete Technical Details can be found in the
STT818B datasheet
provided at this page.Summary in PDF FileSTT818B High gain low voltage PNP power transistor Features Very low collector to emitter saturation voltage DC current gain 100 hFE 3 A continuous collector current IC Applications Power management in portable equipments Switching regulator in battery charger applications Description The device is manufactured in low voltage PNP Planar Technology with Base Island layout The resulting Transistor shows exceptional high gain performance coupled with very low saturation voltage SOT23 6L Figure 1 Internal schematic diagram Table 1 Device summary Order code Marking STT818B 818B Package SOT23 6L Packaging Tape reel August 2007 Rev 5 1 10 www st com 10 Contents Contents STT818B 1 Electrical ratings 3 2 Electrical characteristics 4 2 1 Electrical characteristics curves |
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[ Detailed Data ] |
Here are characteristics of PNP transistors: Structure: A PNP transistor has a sandwich-like structure, consisting of a thin P-type layer (base) sandwiched between two N-type layers (emitter and collector). Polarity: In a PNP transistor, the majority charge carriers are holes, which flow from the emitter to the collector. The emitter is negative relative to the base, and the collector is positive relative to the base. Current flow: When a small current is applied to the base terminal, it allows a much larger current to flow from the emitter to the collector. This is called amplification or gain, and it makes the PNP transistor useful as an electronic switch or amplifier. Voltage levels: The voltage levels in a PNP transistor are opposite to those in an NPN transistor. In a PNP transistor, the base-emitter junction is forward-biased and the collector-base junction is reverse-biased. Biasing: PNP transistors are biased in the opposite direction to NPN transistors. To turn on a PNP transistor, the base must be more negative than the emitter, and to turn it off, the base must be more positive than the emitter. Manufacturers : ST Microelectronics  |
STM STT818B TRANSISTOR HIGH GAIN LOW VOLTAGE PNP POWER TRANSISTOR |
Datasheet STT818B PDF DownLoad ( STM ) |