UNR9112G0L Discrete Semiconductor Products

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The UNR9112G0L is a single, pre-biased transistor typically used in switched-mode power supplies and motor control systems. It integrates a PNP power transistor, together with a control voltage zener and a constant-current source. Essentially, it is designed to drive a PNP power transistor at a fixed current, regardless of the operating temperature. The device acts as a constant-current sink, and the pre-biased nature of the power transistor allows for the device to be powered up with an active bias.

The UNR9112G0L is especially suited for applications that require a constant current sink and an active bias, such as switched-mode power supplies and motor control systems. The device also has built-in protection features, such as over-current protection and a diode reverse-biased protection for the power transistor. Additionally, the device operates within a wide temperature range of -40 °C to 125 °C, so it is well-suited for use in harsh environments.

The UNR9112G0L consists of three components: a PNP power transistor, a zener diode, and a constant-current source. The PNP power transistor has an emitter that is connected to the collector of the zener diode, and the base of the PNP power transistor is connected to the control voltage source. The control voltage is used to set the current through the zener diode, which in turn sets the conduction level of the PNP power transistor. Thus, the UNR9112G0L acts as a constant-current sink. The built-in constant-current source provides active bias for the PNP power transistor, so that it can be powered up easily with a single voltage supply.

The UNR9112G0L is a versatile device that can be used in a variety of applications. In switched-mode power supplies, the device can be used as a constant-current sink that provides a fixed current to the power supply, regardless of the operating temperature. In motor control systems, it can be used to provide a stable current to speed up and slow down the motor, while also providing a constant, active bias that prevents the motor from overheating. Additionally, the device comes with built-in protection features such as over-current and reverse-biased protection, so it can be used safely in a variety of applications.

In summary, the UNR9112G0L is a single, pre-biased transistor that is typically used in switched-mode power supplies and motor control systems. It consists of a PNP power transistor, together with a control voltage zener and a constant-current source. It provides a constant current sink, while also providing an active bias that allows the device to be powered up easily with a single voltage supply. It also comes with protection features such as over-current protection and reverse-biased protection. Thus, it is a versatile device that can be used in a variety of applications.

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