2SD1757KT146S

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Transistors - Bipolar (BJT) - Single

A transistor is a three-layer semiconductor device consisting of source, gate and drain. Among them, the source is regarded as the signal input end, the gate is the control input end, and the drain is the signal output end. 2SD1757KT146S is a type of SOT-23 Shape Transistor, mainly used in the interface circuit of signal and power field.

Application field of 2SD1757KT146S

The 2SD1757KT146S SOT-23 Shape Transistor is mainly used in signal and power interface circuit applications, such as switched mode power supply (SMPS), low-voltage power amplifier, low-voltage oscillator, low-voltage audio circuit, low-voltage step-up circuit, low-voltage capacitive turn-off circuit, etc. Besides, it can be used in the interface of signal and power circuits to control the current of power elements such as Darlington transistors and MOSFETs, and thus to save board spacing.

Working Principle of 2SD1757KT146S

The input signal of 2SD1757KT146S is applied to the base end of the B-C junction of the transistor, and the base current is used to control the conduction current of the E-C junction. When the base signal is weak, the minority carrier injected into the inner base is limited and the transistor is turned off. The E-C junction is not conductive, and current can not flow from E to C. On the contrary, when the signal applied to the base is strong enough, minority carrier injection current is sufficient to turn on the E-C junction, so it will become conductive and the C-E current will flow, thus driving the output load.

Conclusion

2SD1757KT146S is an SOT-23 shape Transistor, mainly used in signal and power applications such as low-voltage circuits and switched power supplies. It has the characteristics of low voltage, small current, high transfer rate and high current gain. It can be used in the interface of signal and power circuits to control the current of power elements, and thus to save board spacing.

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