Overview
The FOD817B3SD is a 4-pin DIP phototransistor optocoupler produced by onsemi. This device consists of a gallium arsenide infrared emitting diode driving a silicon phototransistor in a dual in-line package. The FOD817 series is designed to provide high isolation and reliability, making it suitable for various applications requiring optical isolation and signal transfer.
Key Specifications
| Parameter | Device | Test Conditions | Min | Max | Unit | |
|---|---|---|---|---|---|---|
| CTR (Current Transfer Ratio) | FOD817B | IF = 5 mA, VCE = 5 V | 130 | 260 | % | |
| VCE(SAT) (Collector-Emitter Saturation Voltage) | FOD817 | IF = 20 mA, IC = 1 mA | 0.1 | 0.2 | V | |
| BVCEO (Collector-Emitter Breakdown Voltage) | FOD817 | IC = 0.1 mA, IF = 0 | 70 | V | ||
| BVECO (Emitter-Collector Breakdown Voltage) | FOD817 | IE = 10 µA, IF = 0 | 6 | V | ||
| VIORM (Maximum Working Insulation Voltage) | FOD817 | 850 | Vpeak | |||
| VIOTM (Highest Allowable Over-Voltage) | FOD817 | 8000 | Vpeak | |||
| External Creepage | FOD817 | ≥ 7 | mm | |||
| External Clearance | FOD817 | ≥ 7 | mm |
Key Features
- AC Input Response: The FOD817B3SD is capable of handling AC inputs, making it suitable for applications such as AC line monitoring.
- High Current Transfer Ratio (CTR): The FOD817B has a CTR range of 130% to 260%, ensuring reliable signal transfer.
- High Isolation Voltage: With a maximum working insulation voltage of 850 Vpeak and an input-output isolation voltage of 5000 VACRMS for 1 minute, this device provides high electrical isolation.
- Safety and Regulatory Approvals: Compliant with UL1577 and DIN EN/IEC60747-5-5 standards, ensuring safety and reliability in various applications.
- Low Collector-Emitter Saturation Voltage: The device has a low VCE(SAT) of 0.1 to 0.2 V, which is beneficial for low-power applications.
Applications
- Power Supply Regulators: Used in power supply circuits to provide isolated feedback and control signals.
- Digital Logic Inputs: Suitable for interfacing digital logic signals across different voltage domains while maintaining electrical isolation.
- Microprocessor Inputs: Can be used to isolate microprocessor inputs from external signals, enhancing system reliability and safety.
- Telephone Line Interface: Although more commonly associated with the FOD814, the FOD817 series can also be used in telephone line interfaces where isolation is critical.
Q & A
- What is the package type of the FOD817B3SD?
The FOD817B3SD is available in a 4-pin SMT (Surface Mount Technology) package with lead bend, and it is also available in tape and reel packaging.
- What is the current transfer ratio (CTR) range for the FOD817B?
The CTR range for the FOD817B is 130% to 260%.
- What are the safety and regulatory approvals for the FOD817 series?
The FOD817 series is compliant with UL1577 and DIN EN/IEC60747-5-5 standards.
- What is the maximum working insulation voltage for the FOD817 series?
The maximum working insulation voltage (VIORM) is 850 Vpeak.
- What is the collector-emitter breakdown voltage for the FOD817?
The collector-emitter breakdown voltage (BVCEO) is 70 V.
- What are typical applications for the FOD817 series?
Typical applications include power supply regulators, digital logic inputs, and microprocessor inputs.
- What is the external creepage and clearance for the FOD817 series?
The external creepage and clearance are both ≥ 7 mm.
- What is the highest allowable over-voltage for the FOD817 series?
The highest allowable over-voltage (VIOTM) is 8000 Vpeak.
- What is the collector-emitter saturation voltage for the FOD817?
The collector-emitter saturation voltage (VCE(SAT)) is 0.1 to 0.2 V.
- How does the FOD817B3SD handle AC inputs?
The FOD817B3SD is capable of handling AC inputs due to its design, which includes gallium arsenide infrared emitting diodes driving a silicon phototransistor.
