NCV78723MW0R2G

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NCV78723MW0R2G is a Power Management Integrated Circuit (PMIC) - LED driver, which is available in a small, 10-pin DFN (dual flat no-lead) package. The device is well suited for driving LEDs in both general illumination applications as well as in computer systems. The NCV78723MW0R2G is designed to provide a wide range of output current levels with a single inductor, allowing flexibility and cost savings when compared to multiple discrete components. The device also features a high efficiency, constant-current, linear mode of operation, allowing for maximum efficiency and color accuracy.

The NCV78723MW0R2G is designed to provide single-stage, constant current LED control with a minimum of external components. It consists of three main blocks: The voltage regulating stage, the LED current regulating stage, and the LED current sensing block. The device has a wide input voltage range of 10V to 37V and can support multiple LED channels with a maximum output current of 2.2A per channel. An internal voltage regulator keeps the output current at a constant level regardless of input variation or LED pin voltage variation.

The voltage regulating stage of the device is composed of two Low Dropout (LDO) voltage regulators. The outputs of the two LDOs are connected to a buffering circuit that symmetrically adjusts the LED pin drive voltage, providing high accuracy and eliminates electrolytic capacitor requirements. The LED current regulating stage consists of an adjustable current source, operating on the principle of a non-inverting amplifier. The LED current is sensed by a shunt resistor connected to an operational amplifier and an internal voltage divider. The output from the sensing circuit is used to regulate the current source, providing accurate control of the output current.

The NCV78723MW0R2G is designed for applications requiring high efficiency, low noise, constant-current, linear LED drive. These types of applications include the backlighting of LCDs, lighting of keyboards and indicators, computer systems, and automotive signal lights and displays. The device features simple PC board layouts and can be implemented with a minimal number of external components. The device also offers a low voltage drop-out (Vdroop) mode, which can extend battery life in battery-powered applications, and an active frequency jittering that helps reduce the amount of external components and noise.

The NCV78723MW0R2G is an excellent choice for replacing conventional discrete LED drivers in systems that require high efficiency, low noise, and constant-current LED driving capability. Its wide range of output current levels and its low voltage input range make it ideal for a variety of LED lighting applications, including mobile phones, notebook computers and tablets, and automotive systems.

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