FFB3906 Discrete Semiconductor Products

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The FFB3906 is a central field application and working principle utilizing bipolar junction transistors (BJT). This is a powerful tool for the construction of high power, high frequency, and high resolution audio amplifiers and transducers. This article explains the basics of the FFB3906 application field and working principle.The FFB3906 is a single-chip bipolar transistor array which contains four pairs of matched high-voltage NPN transistors. Its operating voltage is equal to or higher than the breakdown voltage of the transistors (ca. 98 Volts). This translates to an operating voltage range of 98 Volts or greater. The FFB3906 is able to handle peak voltage swing of up to 16 Volts and current swing of up to 2 Amperes.The key features of the FFB3906 include its low noise, low distortion, high input impedance, and wide dynamic range. Additionally, the FFB3906 has a high output current capability and can be used with a wide range of capacitive loads. These features make the FFB3906 an ideal choice for high-power audio and instrument amplifiers, as well as for other high-power audio applications.The working principle of the FFB3906 is based on its configuration as a four-pair of matched NPN transistors. This configuration allows for the construction of a current-source bias transistor, which is referred to as a differential pair. Each pair of transistors acts as an independent amplifier stage, with the output of the transistor stage being equal to the input.The current-source bias of the differential pair is provided by a current mirror circuit, which is configured to provide an inverted current flow. This inverted current is fed back to the input, providing a negative feedback loop. The negative feedback reduces the gain of the differential pair, resulting in a low output impedance and a low distortion at high frequencies.The bipolar transistor array of the FFB3906 is connected in a two-sided, two-level topology, which is commonly referred to as an “L-stack” configuration. This configuration allows the FFB3906 to effectively manage power dissipation and minimize the amount of power lost in the form of heat. The L-stack configuration also provides for a low output impedance, low distortion, and a wide dynamic range, making it ideal for high-power audio amplifiers and high-resolution audio transducers.In addition to its features related to audio performance, the FFB3906 also has some unique features, including its ability to operate at wide temperature ranges and its high immunity to EMI and RFI interference. Additionally, the FFB3906 has a “Power-On Reset” feature, which allows it to be automatically reset after a power failure, eliminating the need for manual power-up resetting.The FFB3906 bipolar transistor array is a powerful tool for the construction of high power, high frequency, and high resolution audio amplifiers and transducers. Its low noise, low distortion, high input impedance, and wide dynamic range make it an ideal choice for these applications. The FFB3906 is capable of handling peak voltage swing of up to 16 Volts and current swing of up to 2 Amperes, allowing it to be used in higher power applications. The “Power-On Reset” feature also adds to its overall flexibility and usability. Finally, the L-Stack configuration helps to maximize the efficiency of the FFB3906, resulting in greater reliability and improved audio performance.

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