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BD679 Transistor
Product Overview
Category
The BD679 is a PNP silicon power transistor.
Use
It is commonly used in audio amplifier and switching applications.
Characteristics
- Voltage: 80V
- Current: 4A
- Power Dissipation: 36W
- Transition Frequency: 3MHz
- Package Type: TO-126
- Packaging/Quantity: Bulk packaging, typically available in reels of 1000 units
Essence
The BD679 is designed for general-purpose amplifier and low-speed switching applications.
Specifications
- Collector-Emitter Voltage (VCEO): -80V
- Collector-Base Voltage (VCBO): -80V
- Emitter-Base Voltage (VEBO): -5V
- Collector Current (IC): -4A
- DC Current Gain (hFE): 40 to 160
- Power Dissipation (PD): 36W
- Operating and Storage Junction Temperature Range: -65°C to +150°C
Detailed Pin Configuration
The BD679 transistor has three pins: 1. Base (B) 2. Collector (C) 3. Emitter (E)
Functional Features
- High current capability
- Low voltage drop
- Complementary NPN type available (BD680)
Advantages
- Suitable for audio amplification and low-speed switching
- Robust construction for reliable performance
- Wide operating temperature range
Disadvantages
- Relatively low transition frequency compared to some modern transistors
- Limited to medium power applications
Working Principles
The BD679 operates as a current-controlled switch or amplifier. When a small current flows into the base, it controls a larger current flowing between the collector and emitter.
Detailed Application Field Plans
The BD679 is commonly used in the following applications: - Audio amplifiers - Low-speed switching circuits - Driver stages for high-power transistors
Detailed and Complete Alternative Models
Alternative models to the BD679 include: - BD675 - BD676 - BD678 - BD680 (complementary NPN type)
In conclusion, the BD679 transistor is a versatile component suitable for various audio and switching applications. Its robust design and moderate power handling capabilities make it a popular choice among electronics enthusiasts and professionals alike.
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What is the BD679 transistor used for?
- The BD679 is a PNP power transistor commonly used in audio amplifiers, voltage regulators, and power supply circuits.
What are the key specifications of the BD679 transistor?
- The BD679 has a maximum collector current of 4A, a collector-emitter voltage of 80V, and a power dissipation of 36W.
How do I connect the BD679 in a typical audio amplifier circuit?
- In an audio amplifier circuit, the BD679 can be connected as a driver or output stage to amplify the audio signal.
Can the BD679 be used in voltage regulator circuits?
- Yes, the BD679 can be used in voltage regulator circuits to regulate and stabilize the output voltage.
What are the common applications of the BD679 in power supply circuits?
- The BD679 can be used in power supply circuits to control and regulate the flow of power to various components.
What are the recommended operating conditions for the BD679?
- The BD679 operates best within a temperature range of -65°C to 150°C and requires proper heat sinking for optimal performance.
How do I ensure proper heat dissipation for the BD679 in my circuit?
- To ensure proper heat dissipation, it's important to use a heat sink and provide adequate ventilation around the transistor.
What are the typical failure modes of the BD679 transistor?
- Common failure modes include overheating due to inadequate heat dissipation, overloading, and voltage spikes.
Can the BD679 be used in high-power applications?
- Yes, the BD679 is suitable for high-power applications such as audio amplifiers and power supplies within its specified limits.
Are there any alternative transistors that can be used in place of the BD679?
- Yes, alternatives include transistors with similar specifications such as TIP31, TIP32, and 2N3055, but it's important to check compatibility and ratings before substitution.