Overview
The FODM8801B, part of the OptoHiT series from onsemi, is a high-temperature phototransistor optocoupler designed to operate in extreme conditions. This device utilizes onsemi’s proprietary process technology to achieve high operating temperature characteristics up to 125°C. The optocoupler consists of an aluminum gallium arsenide (AlGaAs) infrared light-emitting diode (LED) optically coupled to a phototransistor, packaged in a compact half-pitch, mini-flat, 4-pin package. It is notable for its high current transfer ratio at very low input current and its high input-output isolation voltage of 3750 VACRMS.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Temperature (TA) | −40 to +125 | °C |
| Input Low Voltage (VFL(OFF)) | −5.0 to +0.8 | V |
| Input High Forward Current (IFH) | 1 to 10 | mA |
| Input-Output Isolation Voltage (VISO) | 3750 | VACRMS |
| Isolation Resistance (RISO) | 10^12 | Ω |
| Isolation Capacitance (CISO) | 0.3 to 0.5 | pF |
| Current Transfer Ratio (CTRCE) | 130 to 260% (FODM8801B at IF = 1.0 mA, VCE = 5 V) | % |
| Turn-On Time (tON) | 1 to 20 μs | μs |
| Turn-Off Time (tOFF) | 1 to 20 μs | μs |
| Output Rise Time (tR) | 5 μs | μs |
Key Features
- Utilizes proprietary process technology to achieve high operating temperature characteristics up to 125°C.
- High current transfer ratio at very low input current.
- High input-output isolation voltage of 3750 VACRMS.
- Compact half-pitch, mini-flat, 4-pin package.
- Aluminum gallium arsenide (AlGaAs) infrared light-emitting diode (LED) optically coupled to a phototransistor.
- Suitable for “safe electrical insulation” as per DIN EN/IEC 60747-5-5.
Applications
The FODM8801B is suitable for a variety of high-temperature and high-isolation applications, including:
- Industrial control systems.
- Automotive systems requiring high reliability and temperature tolerance.
- Medical devices that need high isolation and safety standards.
- Power supplies and DC-DC converters in harsh environments.
- Communication systems that require high signal integrity and isolation.
Q & A
- What is the maximum operating temperature of the FODM8801B?
The maximum operating temperature is 125°C.
- What is the input-output isolation voltage of the FODM8801B?
The input-output isolation voltage is 3750 VACRMS.
- What type of LED is used in the FODM8801B?
The device uses an aluminum gallium arsenide (AlGaAs) infrared light-emitting diode (LED).
- What is the typical current transfer ratio of the FODM8801B?
The typical current transfer ratio is between 130% to 260% at IF = 1.0 mA, VCE = 5 V.
- What is the turn-on and turn-off time of the FODM8801B?
The turn-on and turn-off times are typically 1 to 20 μs.
- What is the package type of the FODM8801B?
The device is packaged in a compact half-pitch, mini-flat, 4-pin package.
- Is the FODM8801B suitable for high-temperature applications?
Yes, it is designed to operate up to 125°C.
- What safety standards does the FODM8801B comply with?
The device complies with DIN EN/IEC 60747-5-5 for “safe electrical insulation”.
- What are some typical applications of the FODM8801B?
Typical applications include industrial control systems, automotive systems, medical devices, power supplies, and communication systems.
- How is the reflow profile for the FODM8801B specified?
The reflow profile includes a peak body package temperature of 245°C, with specific ramp-up and ramp-down rates and time limits as detailed in the datasheet.
