MMBT3904HLT1G

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Part Status:	Active
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Vce Saturation (Max) @ Ib, Ic:	--
Current - Collector Cutoff (Max):	--
DC Current Gain (hFE) (Min) @ Ic, Vce:	--
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MMBT3904HLT1G Application Field and Working Principle The MMBT3904HLT1G is a surface-mount bipolar junction transistor (BJT) designed to operate in both switching and amplifier applications. It is designed to provide high reliability and performance in both medium-power and high-power applications. The device is made with a single die and has 3-terminals (collector, base, and emitter).The MMBT3904HLT1G is used in automotive and power management applications. It is also suitable for audio amplifiers, voltage regulators, TVs, radios, and portable electronic devices.Working Principle The MMBT3904HLT1G operates on the bipolar junction transistor (BJT) principle. BJTs are current-controlled transistors that utilize the physical properties of semiconductor materials. It consists of a three terminal device made from two p-n junction regions (Base-Emitter and Base-Collector). When a voltage is applied between the base and emitter terminals of a BJT, the base region becomes forward-biased and conducts current. This current, in turn, controls the amount of current flowing between the collector and emitter of the transistor.When there is no base current, the transistor remains off, and no current will flow between the collector and emitter. When a base current is applied, the transistor is in the forward-biased mode and current will flow through the collector and emitter (known as the collector current, or Ic). The collectors current is dependent on the base current, and is typically determined by the base-emitter voltage (known as Vbe).Applications The MMBT3904HLT1G is suitable for a wide range of applications, including audio amplifiers, voltage regulators, radios, TVs, and portable electronic devices. It is also widely used in automotive and power management applications.In audio amplifier applications, the transistor provides high gain and low distortion, making it ideal for low-voltage audio amplifiers. It is also suitable for voltage regulator applications, as it can accurately regulate voltages up to 8V.In radio and TV applications, the transistor provides high linearity, allowing for wideband reception and improved system performance. It is also highly reliable, which helps reduce downtime and costs associated with repairs.For portable electronic devices, such as mobile phones and PDAs, the transistor provides high efficiency and power density. It is also low-voltage compatible, which helps reduce power consumption and extends battery life.Conclusion The MMBT3904HLT1G is a surface-mount, single-die bipolar junction transistor (BJT) with 3-terminals (collector, base, and emitter). The device has high reliability and performance suitable for a wide range of applications, including audio amplifiers, voltage regulators, radios, TVs, and portable electronic devices. It operates on the bipolar junction transistor principle and is forward-biased when a base current is applied. The device provides high gain and low distortion for audio amplifier applications, as well as high linearity and reliability for radio and TV applications. It is also low-voltage compatible for portable electronic devices.

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