NCP5381AMNR2G

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NCP5381AMNR2G Voltage Regulator

The NCP5381AMNR2G is a High Voltage MOSFET Constant Voltage/Constant Current Linear Regulator from ON Semiconductor. This device is designed to provide voltage and current regulation for LEDs, wherein both the output voltage and current are adjustable. This fixed slim-profile regulator offers both high efficiency and ruggedness, which makes it suitable for a wide range of applications.

Applications

The NCP5381AMNR2G is ideal for automotive, industrial and general lighting applications, since it can deliver the right voltage, current and power required to drive LED and LED arrays. The LED can be driven directly from the device and is compatible with both AC and DC inputs. Additionally, the slim-profile design of the device makes it suitable for use in tight spaces, making it an ideal choice for a variety of high current LED applications, including: power supplies, security lighting, street lighting, billboard and sign lighting, exit signs and automotive applications.

Working Principle

The NCP5381AMNR2G is based on a charge pump plus linear regulator topology, which ensures high line regulation and excellent load transient response. On the input side of the device, a charge pump is used to convert the input voltage to a higher voltage, and thus store energy in an external capacitor. On the output side of the device, a linear regulator IC continuously regulates the output current and voltage, resulting in output stability and minimal variation over temperature, line voltage and load conditions.

To achieve current regulation, the output current of the NCP5381AMNR2G is sensed using an external resistor. This resultant voltage is fed to the external voltage error amplifier, which, in turn, adjusts the output current as per the set point. For voltage regulation, the output voltage is adjusted using a voltage control loop with an external reference. The output voltage is then monitored using a voltage sense comparator, which is used to adjust the output voltage.

Benefits

The NCP5381AMNR2G is a high voltage, constant voltage/constant current linear regulator with a slim-profile design, which makes it suitable for a wide range of applications. The device delivers excellent stability, efficiency and ruggedness, making it an ideal option for driving LEDs in applications such as automotive power supplies, security lighting, street lighting, billboard and signage lighting, exit signs and automotive applications.

Conclusion

The NCP5381AMNR2G voltage regulator from ON Semiconductor is an ideal choice for driving LED and LED arrays. This device is based on a Charge Pump plus Linear Regulator topology, which ensures high line regulation and excellent load transient response. The NCP5381AMNR2G is designed to provide voltage and current regulation, and offers both high efficiency and ruggedness. This device is suited for a variety of high current LED applications, making it an ideal choice for automotive, industrial and general lighting applications.

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