NCP5623AMUTBG

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NCP5623AMUTBG is a high-precision voltage regulator with an integrated advance low-side MOSFET designed for DC-to-DC application in the isolated flyback topology. This device is part of a PMIC – LED Driver family, offering features especially adapted for LED supply regulation and control.

General Features

• Low Startup Current of 250nA
• High Accuracy Voltage Regulation (0.5% Supply Volatage Tolerance)
• Power up/Power down Sequencing and Fault Reporting
• External Dynamic Parallel Dimming Control
• Selectable Power On Reset (POR) Levels
• LED current up to 500mA

Application Field

NCP5623AMUTBG can be used in a variety of low-power and high-power LED lighting applications, including LED lighting for high-end general illumination, automotive exterior lighting, automotive interior lighting, and commercial lighting. The high efficiency and excellent thermal behavior of NCP5623AMUTBG enable the design of highly efficient LED lighting solutions.

Working Principle

The NCP5623AMUTBG is a high-precision device with an integrated low-side MOSFET. Its working principle is based on a constant voltage regulation loop to guarantee a steady load current regardless of load or input voltage variations. The device is used in applications which includes low-power to high-power LED lighting systems, where power factor correction may also be necessary.

The operating principle is what makes the NCP5623AMUTBG suitable for LED lighting applications: the constant voltage regulation loop drives the load current using a very precise regulation partition scheme and a MOSFET switch. A power MOSFET is used to regulate the LED current while a low-side MOSFET is used to dissipate energy in a dump load resistive network providing a constant dynamic load to the system.

The NCP5623AMUTBG also allows for dynamic parallel dimming control, which provides a way to dim the LED light output in a much more efficient way than traditional means. Dynamic parallel dimming control uses a low-startup-current MOSFET driver to pulse the MOSFET switch. This allows for more turbulence to both reduce the number of components needed for regulation and noise, and allows for better system heat dissipation and better efficacy.

The NCP5623AMUTBG is also designed with a power-on-reset (POR) function, which prevents the system from being overloaded and reduces the energy consumption. The POR circuitry monitors the power supply and load levels in order to detect a fault, and if a fault is detected, it will reset and cut off the power automatically.

Conclusion

The features, application fields and working principle of NCP5623AMUTBG makes it an ideal LED driver for LED lighting applications. The device is designed with a high-precision voltage regulator loop, low power consumption and allows for dynamic parallel dimming control. The NCP5623AMUTBG is a great choice for energy-efficient LED lighting solutions.

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