NCV2931ADT5.0RKG Integrated Circuits (ICs)

NCV2931ADT5.0RKG Application Field and Working Principle

Introduction

The NCV2931ADT5.0RKG is a type of linear PMIC (Power Management Integrated Circuit) voltage regulator that provides a reliable and cost-effective solution for buck and boost voltage regulation. This device is designed to operate off an input voltage range of 3.5 V to 40 V, and output voltage of 1.5 V to 8.2 V at a maximum load current of 10 A and output power of 85 W. It includes an optimized control circuit and an integrated high-side MOSFET. The input voltage range can be further expanded to up to 60 V, enabling the NCV2931ADT5.0RKG to be used in a wide range of applications, including high power dc / dc converters and regulated power sources. The device also features industry-leading transient response characteristics, and is designed to operate within a wide ambient temperature range from -40°C to 105°C.

Application Field

The NCV2931ADT5.0RKG can be used in a variety of applications ranging from automotive, industrial, to communications and medical. It is suitable for buck, boost, and SEPIC converters that require high efficiency, high reliability, and ease of customization. The device is suitable for applications such as DC/DC power supplies for distributed power management in server systems, point-of-load or motor drive applications. It is also widely used in LED applications, providing the required regulated output voltage, while offering efficient power conversion. In automotive systems, the NCV2931ADT5.0RKG can be used in dashboard illumination, powertrain, motors, and ECUs.

Working Principle

The NCV2931ADT5.0RKG works on the principle of buck, boost and SEPIC voltages regulators. On a buck regulator, the input voltage is higher than the output voltage and thus, the switch duty cycle is controlled to obtain the desired output voltage. In the boost regulator, the input voltage is lower than the output voltage, and thus, the switch duty cycle is adjusted to generate the desired output voltage. In the SEPIC regulator, the switch duty cycle adjusts the average voltage at the output of the converter, while the inductor current is used to shape the output waveform and the output voltage ripple.

The NCV2931ADT5.0RKG consists of a voltage sensing and control circuit and a high side MOSFET connected in series, thus acting as a single switch. The voltage sensing and control circuit senses the voltage at the output of the converter and compares it with the reference voltage for generating the control signal to the series MOSFET. The reference voltage is determined from an external resistive circuit connected to the SEN pin, which may vary from 1.235 V to 17 V, depending on the application.

The series MOSFET is turned on and off by the voltage sensing and control section in order to regulate the average voltage of the output signal. The duty ratio of the series MOSFET is determined by the control circuit based on the feedback voltage compared to the reference voltage, hence providing a consistent output voltage to the load.

The NCV2931ADT5.0RKG also includes overvoltage and undervoltage protection that limits the output voltage to predefined value and maintaining a very stable output voltage even in harsh conditions.

Conclusion

In conclusion, the NCV2931ADT5.0RKG PMIC voltage regulator is a reliable and cost-effective solution for dc/dc power converters. It provides a wide input voltage range, high efficiency, and high power conversion. Besides, it comes with overvoltage and undervoltage protection, enabling the device to be used in a wide range of applications with improved reliability.