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規格
| 屬性 | 價值 |
| Manufacturer | GOODWORK |
| Package / Case | DIP-4 |
| Input voltage type | DC |
| Output Type | Phototransistor |
| Number of Outputs | 1 |
| Reverse Voltage | 6V |
| Load Voltage | 35V |
| Current - Output | 50mA |
| Operating Temperature | -55℃~+110℃ |
| Voltage - Forward(Vf) | 1.2V |
| Isolation Voltage(Vrms) | 5kV |
| Rise time | 6us@2mA,100Ω |
| Fall time | 5us@2mA,100Ω |
| Current Transfer Ratio (CTR) Minimum | 100% |
| Current Transfer Ratio (CTR) Maximum / Saturation Value | 160% |
| Vce Saturation(VCE(sat)) | 100mV@1mA,20mA |
概述
Description
The PC817A is a widely used optoisolator (optocoupler) that provides electrical isolation between input and output circuits using an infrared LED and a phototransistor.
### Key Features:
- Isolation Voltage: 5 kV (AC/DC)
- Current Transfer Ratio (CTR): 50-600% (depends on model)
- Input LED Forward Current (IF): 3-50 mA
- Output Collector-Emitter Voltage (VCEO): 35 V
- Switching Speed: ~4 µs
### Applications:
- Signal isolation in microcontrollers, power supplies, and industrial controls
- Noise suppression in digital circuits
- Feedback control in SMPS (Switch-Mode Power Supplies)
### Advantages:
- Compact DIP-4 package
- Reliable isolation for safety and noise reduction
- Low power consumption
The PC817A is ideal for low-voltage digital interfacing where galvanic isolation is needed. Always check datasheet specifications for exact CTR and current ratings.
### Key Features:
- Isolation Voltage: 5 kV (AC/DC)
- Current Transfer Ratio (CTR): 50-600% (depends on model)
- Input LED Forward Current (IF): 3-50 mA
- Output Collector-Emitter Voltage (VCEO): 35 V
- Switching Speed: ~4 µs
### Applications:
- Signal isolation in microcontrollers, power supplies, and industrial controls
- Noise suppression in digital circuits
- Feedback control in SMPS (Switch-Mode Power Supplies)
### Advantages:
- Compact DIP-4 package
- Reliable isolation for safety and noise reduction
- Low power consumption
The PC817A is ideal for low-voltage digital interfacing where galvanic isolation is needed. Always check datasheet specifications for exact CTR and current ratings.
Equivalent
The PC817A is an optocoupler with equivalents including:
- TLP521-1 (Toshiba)
- EL817 (Everlight)
- CNY17-1 (Vishay)
- SFH618A (Vishay)
- LTV817 (Lite-On)
These offer similar 4-pin DIP packaging, CTR (Current Transfer Ratio), and isolation voltage. Verify datasheets for exact compatibility in your circuit.
- TLP521-1 (Toshiba)
- EL817 (Everlight)
- CNY17-1 (Vishay)
- SFH618A (Vishay)
- LTV817 (Lite-On)
These offer similar 4-pin DIP packaging, CTR (Current Transfer Ratio), and isolation voltage. Verify datasheets for exact compatibility in your circuit.
Pinout
The PC817A is a 4-pin optocoupler with the following pin functions:
1. Pin 1 (Anode) – Input LED anode (+).
2. Pin 2 (Cathode) – Input LED cathode (-).
3. Pin 3 (Emitter) – Output phototransistor emitter (ground side).
4. Pin 4 (Collector) – Output phototransistor collector (supply side).
It provides electrical isolation between input and output, commonly used for signal transmission, feedback circuits, and noise suppression. The current transfer ratio (CTR) varies by model (e.g., 50-600%). Maximum isolation voltage is 5kV.
1. Pin 1 (Anode) – Input LED anode (+).
2. Pin 2 (Cathode) – Input LED cathode (-).
3. Pin 3 (Emitter) – Output phototransistor emitter (ground side).
4. Pin 4 (Collector) – Output phototransistor collector (supply side).
It provides electrical isolation between input and output, commonly used for signal transmission, feedback circuits, and noise suppression. The current transfer ratio (CTR) varies by model (e.g., 50-600%). Maximum isolation voltage is 5kV.
Manufacturer
The PC817A is manufactured by Sharp Corporation, a Japanese electronics company founded in 1912. Sharp is a well-known multinational specializing in optoelectronics, displays, and semiconductor components. The PC817A is an optoisolator (optocoupler) that provides electrical isolation between input and output circuits, commonly used in power supplies, industrial controls, and communication devices. Sharp is recognized for its innovation in optoelectronic technology and has a strong reputation in the electronics industry.
Application
The PC817A is an optocoupler widely used for electrical isolation and signal transmission in various applications, including:
1. Power Supplies – Isolating feedback circuits in SMPS and inverters.
2. Industrial Controls – Protecting microcontrollers from high-voltage noise.
3. Automotive Electronics – Signal isolation in battery management and motor control.
4. Home Appliances – Ensuring safety in washing machines, air conditioners, etc.
5. Telecom Equipment – Isolating communication lines.
6. Medical Devices – Preventing leakage currents in sensitive equipment.
Its compact design, reliability, and high isolation voltage (up to 5kV) make it ideal for noise-sensitive and safety-critical systems.
1. Power Supplies – Isolating feedback circuits in SMPS and inverters.
2. Industrial Controls – Protecting microcontrollers from high-voltage noise.
3. Automotive Electronics – Signal isolation in battery management and motor control.
4. Home Appliances – Ensuring safety in washing machines, air conditioners, etc.
5. Telecom Equipment – Isolating communication lines.
6. Medical Devices – Preventing leakage currents in sensitive equipment.
Its compact design, reliability, and high isolation voltage (up to 5kV) make it ideal for noise-sensitive and safety-critical systems.
Package
The PC817A is available in a DIP-4 (Dual In-line Package, 4-pin) package type. It's a compact, through-hole mounted optocoupler with a standard 2.54mm pin spacing. Common variants may also include surface-mount options like SOP-4 (Small Outline Package), but the DIP-4 is the most widely used for PCB applications.
