NCV494BDR2G

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NCV494BDR2G is a advanced analog integrated circuit (IC) developed by ON Semiconductor for DC-DC switching controllers. It is widely used in a variety of power-management applications and is capable of providing precise, high-efficiency control over a wide range of DC-DC converters.

This device features a high-performance current-mode control architecture that is capable of engaging in either periodic or gated reset mode. It has a wide-input voltage range of 4.5V to 28V, an adjustable output voltage range up to 95%, and an adjustable switching frequency up to 20kHz. Additionally, it offers precise voltage-regulation accuracy of ±1.4%, maximum ripples of less than 10mV, and a programmable overload protection threshold of up to 8A.

In terms of operating capability, the NCV494BDR2G is capable of driving external power MOSFETs with up to 8 amps peak and 0.3 amps continuous. It also has programmable thermal-shutdown protection and a separate charge-pump voltage-reference pin for boosting the reference voltage. Furthermore, it also features an internal kick-start circuit, allowing for smooth restarting or soft-start up.

The working principle of the NCV494BDR2G is based on its current-mode control architecture. This architecture involves measuring the input current of the converter and then comparing it with the reference voltage. The output is then modulated accordingly in order to maintain a constant voltage level across the output. This is achieved by driving a power MOSFET in order to switch the power output of the converter on and off, in order to maintain the desired output voltage.

Due to its high-performance characteristics, the NCV494BDR2G is suitable for a wide range of DC-DC converters. It can be used in battery chargers, automotive systems, ultra-low power applications and other power management systems. In addition, it has been designed for operation in temperatures ranging from -40°C to +85°C, making it highly reliable and suitable for use in harsh environments.

In summary, the NCV494BDR2G is an advanced analog DC-DC switching controller with a wide input voltage range, a programmable overload protection threshold, and precise voltage regulation accuracy. It is suitable for a wide variety of power-management applications, providing reliable high-efficiency control. The current-mode control architecture ensures precise output regulation while the kick-start circuit ensures smooth restarting or soft-start up.

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