Overview
The BD679AG is a medium-power NPN Darlington transistor produced by onsemi. This transistor is designed for use as an output device in complementary general-purpose amplifier applications. It is part of the BD67x series, which includes several variants with different voltage and current ratings.
The BD679AG is known for its high DC current gain and monolithic construction, making it suitable for a variety of power amplification tasks. It is also Pb-free and RoHS compliant, ensuring environmental sustainability.
Key Specifications
| Rating | Symbol | Value | Unit |
|---|---|---|---|
| Collector-Emitter Voltage | VCEO | 80 | Vdc |
| Collector-Base Voltage | VCBO | 80 | Vdc |
| Emitter-Base Voltage | VEBO | 5.0 | Vdc |
| Collector Current | IC | 4.0 | Adc |
| Base Current | IB | 1.0 | Adc |
| Total Device Dissipation | PD | 40 | W |
| Operating and Storage Junction Temperature Range | TJ, Tstg | –55 to +150 | °C |
| Thermal Resistance, Junction-to-Case | RJC | 3.13 | °C/W |
Key Features
- High DC Current Gain: The BD679AG offers a high DC current gain, making it suitable for applications requiring significant current amplification.
- Monolithic Construction: The transistor is built with a monolithic construction, enhancing its reliability and performance.
- Complementary Devices: It is complementary to other devices in the BD67x series, such as BD676, 676A, 678, 678A, 680, 680A, and 682.
- Pb-free and RoHS Compliant: The device is lead-free and complies with RoHS regulations, ensuring environmental sustainability.
- High Voltage and Current Ratings: With a collector-emitter voltage rating of 80V and a collector current rating of 4A, it is suitable for medium-power applications.
Applications
The BD679AG is versatile and can be used in various applications, including:
- General-Purpose Amplifiers: It is particularly useful as an output device in complementary general-purpose amplifier circuits.
- Power Amplification: Its high current gain and medium-power ratings make it suitable for power amplification tasks.
- Automotive and Industrial Control Systems: It can be used in automotive and industrial control systems where medium-power amplification is required.
Q & A
- What is the collector-emitter voltage rating of the BD679AG?
The collector-emitter voltage rating of the BD679AG is 80Vdc.
- What is the maximum collector current of the BD679AG?
The maximum collector current of the BD679AG is 4.0 Adc.
- Is the BD679AG Pb-free and RoHS compliant?
- What is the thermal resistance, junction-to-case, of the BD679AG?
The thermal resistance, junction-to-case, of the BD679AG is 3.13°C/W.
- What is the operating and storage junction temperature range of the BD679AG?
The operating and storage junction temperature range of the BD679AG is –55 to +150°C.
- What are the complementary devices to the BD679AG?
The BD679AG is complementary to devices such as BD676, 676A, 678, 678A, 680, 680A, and 682.
- What is the maximum base current of the BD679AG?
The maximum base current of the BD679AG is 1.0 Adc.
- What is the total device dissipation of the BD679AG at 25°C?
The total device dissipation of the BD679AG at 25°C is 40W.
- Can the BD679AG be used in high-temperature environments?
The BD679AG can operate in a wide temperature range, but its power handling ability is reduced at high case temperatures due to thermal limitations.
- What package type is the BD679AG available in?
The BD679AG is available in the TO-225 package.
