NB649EQJ-LF-P

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Introduction

NB649EQJ-LF-P is a DC/DC converter from Murata. It is a high-performance non-isolated switching regulator which is suitable for both automotive and industrial applications. It has an integrated MOSFET driver, ultra-fast current limit protection, thermal shutdown, and low-side ESD protection. The input voltage range is 4.5-45V and the output voltage is adjustable from 0.6-30V. It has two operating modes: Constant Current (CC) and Constant Voltage (CV).

Application field

NB649EQJ-LF-P is suitable for automotive and industrial applications such as audio amplifiers, power supplies, DC motor controls, battery charging systems, and other high-current applications. It is also suitable for portable and mobile devices which need small form factor and high efficiency.

Working Principle

NB649EQJ-LF-P consists of two main parts: a power MOSFET switch and driver and a feedback control block. The power MOSFET switch is used to convert the input voltage to the desired output voltage. The driver provides a gate control signal to the switch to ensure the optimal switching frequency and amplitude. The feedback control block monitors the output voltage and adjusts the gate control signal to keep the output voltage stable. It also has a range of protection features to ensure safe operation.

The control circuit of NB649EQJ-LF-P utilizes the pulse-width modulation (PWM) technique to regulate the output voltage. It uses a ramp signal to drive the MOSFET switch at a desired frequency and amplitude. The feedback control block senses the output voltage and adjusts the ramp signal accordingly to keep the output voltage stable. The frequency and amplitude of the ramp signal can be adjusted for different applications.

NB649EQJ-LF-P is also equipped with current limit protection. When the current through the power MOSFET switch exceeds the preset limit, the controller will shut down the switch and reduce the feedback loop gain to prevent further increase in the output current. It also has a thermal shutdown feature which will shut off the circuit when the operating temperature exceeds the preset limit.

Conclusion

NB649EQJ-LF-P is a high-performance non-isolated switching regulator designed for automotive and industrial applications. It is suitable for audio amplifiers, power supplies, DC motor controls, battery charging systems, and other high-current applications. It integrates a power MOSFET switch, MOSFET driver, feedback control block, and protection features. The circuit utilizes the PWM technique to regulate the output voltage. It also has current limit protection and thermal shutdown features.

The specific data is subject to PDF, and the above content is for reference