CNY17-3 optocoupler related situation

(1) Basic structure
Composed of light-emitting diodes, photodiodes, optical fibers, integrated circuits, etc. Light emitting diodes convert electrical signals into optical signals, which are transmitted through optical fibers to photodiodes. The optical signals are then converted into electrical signals, and the integrated circuit controls the working state of the optocoupler to achieve signal isolation between the input and output ports.
(2) Parameters
Parameters of photodiodes
Wavelength range: 800nm -1100nm
Peak sensitivity: 850nm
Dark current: 100nA
Transistor parameters
Maximum collector voltage: 70V
Maximum collector current: 150mA
Magnification factor: 100-600
Response time: 3us
(3) Characteristics
Excellent isolation performance: Adopting a combination structure of photodiodes and transistors, it can effectively isolate high-voltage circuits and low-voltage circuits.
Fast response speed: With a response time of only 3us, it is suitable for high-speed data transmission and control application scenarios.
High amplification factor: Transistors have a high amplification factor, which can amplify weak signals output by photodiodes and improve signal detection sensitivity.
(4) Working principle
Based on the photoelectric effect, when photons are absorbed by matter, electron hole pairs are generated, causing the material to conduct electricity. In CNY17-3, the current signal at the input end is converted into an optical signal through an LED, transmitted to the output end through an optocoupler device, and then converted into an electrical signal output 1 through a phototransistor