Optocoupler, also known as optoelectronic isolator, abbreviated as optocoupler. Due to the fact that optocouplers transmit electrical signals through light as a medium, they have a good isolation effect on input and output electrical signals, making them widely used in various circuits. An optocoupler generally consists of three parts: light emission, light reception, and signal amplification. The input electrical signal drives the light-emitting diode (LED) to emit light of a certain wavelength, which is received by the photodetector to generate a photocurrent, and then further amplified before outputting. This completes the conversion from electricity to light to electricity, thus playing a role in input, output, and isolation. Due to the mutual isolation between the input and output of optocouplers and the unidirectional nature of electrical signal transmission, they have good electrical insulation and anti-interference capabilities. Tiandian Optoelectronics has launched a complete range of products for coverage, and has gained satisfactory reputation and support from customers for long-term use. At present, the application groups of Tian Dian Optoelectronics customers include:
01
Power supply/charger/adapter
Optocouplers provide isolation and feedback signal transmission functions in the power system.
The mass-produced models include TD817/357/217/816/356/814/354/214/101X and other models. For applications that require fast charging, it is recommended that customers choose the 101X series products.
02
smart meter
Provide feedback signals for the switch power supply in the electricity meter and communication functions for isolation signals between ICs. The commonly used models include TD817/816. The TD816 product of Tian Dian Optoelectronics has also obtained the qualified certification and recognition from the State Grid of China.
03
White goods
Mainly using transistors as power supply and low-speed signal transmission, mainly using thyristor optocouplers as solenoid valves and heaters for control. Common models include TD817/357/217/816/356/101X, etc. At the same time, users can also use models such as the thyristor series TD30XX/TD30XX-4L/TDM30XX/TDRX2X3. Among them, TDRX2X3 integrates a photosensitive thyristor and a power thyristor, optimizing the conflict between the combination of photosensitive thyristor and power thyristor.
04
lighting
Mainly using thyristor optocouplers as dimming circuits, commonly used models include TD30XX/TD30XX-4L/TDM30XX/TDRX2X3, etc.
05
Industrial control
Mainly using transistor optocouplers or high-speed optocouplers for isolation signal transmission function, commonly used models. For the slow speed optocoupler, TD217/214 can be selected; For the high-speed optocoupler, customers can choose from 6N136/6N137/6N139/TDM501/TDM601/TDL501/TDL601
06
Photovoltaic inverter
Mainly using gate driver optocouplers, optical relays, as direct to alternating current conversion inverters. Common optocoupler models: TD3120R/TD3150L/TDL314/TDL341. For the optical relay, models such as TD21X-4L/TD21X-6L/TDM21X can be selected.
07
Brushless motor
The main use of high-speed optocouplers for fast phase change, as well as the combination of power drive functions of gate drivers or relays, commonly used models: high-speed optocouplers 6N137/TDM601 with gate drivers TD3120R/3150L/TDL314/TDL341 or optical relays D21X-4L/TD21X-6L/TDM21X and other models.