CNY17-3 vs TLP184(TPR,E)
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| Category | Optoisolators - Transistor, Photovoltaic Output | Optoisolators - Transistor, Photovoltaic Output |
| Manufacturer | Vishay Semiconductor Opto Division | Toshiba Semiconductor and Storage |
| Description | OPTOISO 5KV TRANS W/BASE 6DIP | OPTOISO 3.75KV TRANS 6-SO 4 LEAD |
| Package | 6-DIP (0.300", 7.62mm) | 6-SMD (4 Leads), Gull Wing |
| Series | - | - |
| Operating Temperature | -55°C ~ 110°C | -55°C ~ 125°C |
| Mounting Type | Through Hole | Surface Mount |
| Package / Case | 6-DIP (0.300", 7.62mm) | 6-SOIC (0.179", 4.55mm Width), 4 Leads |
| Supplier Device Package | 6-DIP | 6-SO, 4 Lead |
| Output Type | Transistor with Base | Transistor |
| Voltage - Output (Max) | 70V | 80V |
| Number of Channels | 1 | 1 |
| Input Type | DC | AC, DC |
| Voltage - Isolation | 5000Vrms | 3750Vrms |
| Rise / Fall Time (Typ) | 2µs, 2µs | 5µs, 9µs |
| Voltage - Forward (Vf) (Typ) | 1.39V | 1.25V |
| Current - DC Forward (If) (Max) | 60mA | 50mA |
| Current - Output / Channel | 50mA | 50mA |
| Current Transfer Ratio (Min) | 100% @ 10mA | 50% @ 5mA |
| Current Transfer Ratio (Max) | 200% @ 10mA | 400% @ 5mA |
| Vce Saturation (Max) | 400mV | 300mV |
| Turn On / Turn Off Time (Typ) | 3µs, 2.3µs | 9µs, 9µs |
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1. Is an opto-isolator a transistor?
An opto-isolator is not a transistor. An opto-isolator is a semiconductor device that uses light to transmit electrical signals between isolated circuits, also known as an optocoupler or photoelectric coupler. It consists of a light-emitting diode (LED) and a photoelectric sensor, and transmits and isolates electrical signals through optical signals.
The working principle of the opto-isolator is to convert the electrical signal at the input end into an optical signal through an LED, and then transmit it to the photoelectric sensor through a closed optical channel, and the photoelectric sensor converts the optical signal into an electrical signal for output. This conversion process realizes the isolated transmission of electrical signals and prevents the transmission of interference signals.
Optical isolators have a wide range of applications in electronic devices, especially in systems that require electrical isolation, such as communications and monitoring systems, to prevent high-voltage transmitters from affecting low-power circuits. -
2. What is the difference between optocouplers and opto-isolators?
The main difference between optocouplers and opto-isolators is their operating voltage range and application scenarios.
Operating voltage range
Optocouplers: Applicable to circuits with a potential difference of less than 5000V, used to maintain electrical isolation when transmitting data between two circuits.
Opto-isolators: Applicable to high-voltage circuits with a potential difference of more than 5000V, used to transmit analog or digital data between systems, ensuring that the isolation voltage of the power system is 5000 to 50,000V or more.
Application scenarios
Optocouplers: Commonly used in low-voltage circuits, such as microcontroller interfaces, allowing microcontrollers to safely control high-power devices, providing high resistance and effective isolation.
Opto-isolators: Applicable to high-voltage applications, such as solid-state relays and optical encoders, ensuring isolation between sensitive measurement circuits and high-power control circuits. -
3. What is a transistor output?
Transistor output is an output mode in circuit control, mainly used for controlling actuators (such as motors and electromagnets) in automation equipment. Transistor output realizes the switching control of the circuit through a semiconductor device, a transistor. As an electronic switch, the transistor has the characteristics of fast response and high-frequency action, and is suitable for application scenarios that require high-speed switching.
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4. What is the role of the optical isolator?
The main function of the optical isolator is to allow light to pass in one direction and prevent light from passing in the opposite direction, thereby limiting the transmission direction of light and ensuring that light can only be transmitted in one direction. This characteristic makes the optical isolator play an important role in optical fiber communication systems, which can isolate reflected light and prevent the adverse effects of backward transmission light on the light source and optical path system.
