NJU7261U30-TE1

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NJU7261U30-TE1 Application Field and Working Principle

NJU7261U30-TE1 is a buck-mode switching regulator for DC-DC converter applications. It is classified into PMIC (Power Management Integrated Circuit) – Voltage Regulators – DC DC Switching Regulators. With an input voltage range of 2.8V to 5.5V and adjustable output voltage of 1.2V to 5V, it works as an efficient regulator of input voltage sources to support the low power applications. This IC features dual PWM control by an external clock and supports desaturation detection, over-voltage protection (OVP), cycle-by-cycle current limiting (OCP) and over-temperature protection (TEMP). Series NJU7261 regulators are highly integrated, include two power MOSFETs, a voltage reference, and many other active devices, require few external components and provide superior ability for system design.

Working Principle

The NJU7261U30-TE1 works using the buck-mode switching regulator principle. The buck converter is a type of DC-DC converter, which operates by stepping down the input voltage with a certain input to output voltage ratio. Typically, the input voltage is higher than the output voltage and when certain conditions are met, the buck converter acts as an electrical switch, triggering a complete cycle of power transfer. This process is repeated until a desired output voltage is achieved. The regulator then synchronizes the power, sensing the power supply and switching back and forth between the two states, which helps to maintain a steady voltage.

The NJU7261U30-TE1 switching regulator is controlled by two integrated Pulse Width Modulation (PWM) controllers and two external PWM pins. The PWM controllers work together and generate the output voltage by modulating the duty cycle of the external PWM pins. The duty cycle is then constantly adjusted until a desired output voltage is achieved.

The NJU7261U30-TE1 also features several protective circuits. The first protective circuit is an over-voltage protection (OVP) circuit, which detects the output voltage and stops the output when the voltage exceeds the designed threshold. The second protective circuit is a cycle-by-cycle current limiting (OCP) circuit, which detects the output current of the regulator and shuts off the output when the current exceeds the designed limit. Finally, the NJU7261U30-TE1 also has an over-temperature protection (TEMP) circuit, which shuts off the output when the regulator’s temperature is too high.

Applications

The NJU7261U30-TE1 is suitable for a wide range of applications. It is often used in battery-powered applications, where it can maintain steady power supply efficiently. It is also commonly used in automotive, communication, medical and industrial systems.

In cell phones and other mobile devices, the NJU7261U30-TE1 is used to regulate input voltage sources, providing consistent power to various components of the device. For example, the regulator is often used in the power supply sub-systems of the device, providing power to devices such as the CPU and GPU, as well as other peripherals.

It is also used in automotive applications, to provide a regulated voltage for the ECU, which leads to improved system performance and stability. The NJU7261U30-TE1 has proven to be effective in automotive systems, due to its high efficiency, low noise and good load transient response.

In medical systems, the NJU7261U30-TE1 is used to supply power to implantable medical devices. The regulator offers improved reliability, ultra-low power consumption, and high accuracy when driven from battery power sources.

Finally, the NJU7261U30-TE1 is also used in industrial systems. It is often used in robotics and automation solutions, as well as for automation control systems. The regulator is often used in elevated temperature environments, as it can run with a maximum junction temperature of up to 150°C.

Conclusion

The NJU7261U30-TE1 is a buck-mode switching regulator for DC-DC converter applications. It is classified into PMIC (Power Management Integrated Circuit) – Voltage Regulators – DC DC Switching Regulators. With an input voltage range of 2.8V to 5.5V and adjustable output voltage of 1.2V to 5V, it works as an efficient regulator of input voltage sources to support the low power applications. This IC features dual PWM control by an external clock and supports desaturation detection, over-voltage protection (OVP), cycle-by-cycle current limiting (OCP) and over-temperature protection (TEMP). Series NJU7261 regulators are highly integrated, require few external components and provide superior ability for system design.

The NJU7261U30-TE1 is suitable for wide range of applications, such as cell phones and other mobile devices, automotive, communication, medical and industrial systems. With its high efficiency, low noise, good load transient response, improved reliability, ultra-low power consumption, and high accuracy, it has proven to be an effective regulator for a wide range of applications.

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