작은 태양전지 - 포토다이오드입니다.

포토트랜지스터와 어떻게 다르냐고요? 포토트랜지스터는 광량에 비례한 출력을 외부전력을 이용해 증폭하여 사용하는 방식인데 반해 포토다이오드는스스로 광량에 비례하는 전력을 생산하며 주로 정밀한 조도(Lux)측정용으로 사용되거나 초저전력을 사용하는 시계같은 기기를 충전하는 초소형 태양전지로도 사용되고 있습니다.

Description: The BPW34 is a tiny, general purpose PiN photodiode. This photodiode has a ton of uses, one of which is to use it is a mini solar cell to power your project. The cell is sensitive to a wide range of light wavelengths (430-1100nm), so it should produce power in a number of different settings. The rated open circuit voltage is 350mV (900nm, 1mW/cm² light source), and short circuit current is 47μA.

These are fun (of course)! We shined a 940nm infrared LED on one of them and it produced about 0.5VDC open circuit voltage. Stringing four together in series, we were able to turn an LED on with them. They'll also produce a small voltage, ~250mV, in a brightly, fluorescent-lit room.

Features:

• Package type: leaded
• Package form: top view
• Radiant sensitive area (in mm2): 7.5
• High photo sensitivity
• High radiant sensitivity
• Suitable for visible and near infrared radiation
• Fast response times
• Angle of half sensitivity: ϕ = ± 65°
• Lead (Pb)-free, RoHS compliant

Dimensions:

• 5.4x4.3x3.2 mm

Documents:

• Datasheet