NB671LGQ-P Integrated Circuits (ICs)

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NB671LGQ-P Application Field and Working Principle

NB671LGQ-P is a power management integrated circuit (PMIC) switching regulator for DC-DC converters. It is designed to supply an adjustable or fixed output voltage, usually 5V or 3.3V, from a wide input voltage range from 6 to 50V. It is suitable for both linear and switch-mode DC-DC converters, and has a high efficiency over a wide input voltage range.

NB671LGQ-P is able to operate in several switch-mode topologies such as buck (step-down), boost (step-up), buck-boost, and inverting configurations. It has an integrated power mosfet, high-side and low-side current limit and over-temperature protection. It also offers integrated compensation and under-voltage lockout (UVLO) to ensure proper system behavior.

The NB671LGQ-P switching regulator operates in pulse-width modulation (PWM) mode. This is when the power MOSFET is switched on and off to produce a rectangular waveform, which can then be filtered to produce a regulated voltage. The frequency of the switching is typically a couple hundred kilohertz and determined by the external components.

The NB671LGQ-P has a built-in current-mode control, which is a widely used method in switching power supplies. Current-mode control senses the output current and adjusts the duty cycle to maintain the desired output voltage, resulting in improved transient response and excellent load regulation.

The NB671LGQ-P also has integrated protection features such as over-voltage protection (OVP) to protect against out of range voltages. It also includes over-current protection (OCP) to protect against excessive output current and over-temperature protection (OTP) to protect against excessive operating temperature.

NB671LGQ-P is widely used in automotive, industrial, consumer and other electronics applications where high efficiency and high output voltage accuracy is required. It is available in a QFN and DIP package, making it suitable for a wide variety of application environments.

In conclusion, NB671LGQ-P is a power management integrated circuit (PMIC) switching regulator for DC-DC converters. It has a high efficiency over a wide input voltage range, is able to operate in several switch-mode topologies, and has built-in protection features such as OVP, OCP, and OTP. It is widely used in automotive, industrial, consumer, and other electronics applications, and is available in both QFN and DIP packages.

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