NCV51199PDR2G

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NCV51199PDR2G Application Field and Working Principle

The NCV51199PDR2G is a frequency generator and input voltage supervisor (IVGS) integrated circuit (IC) in the special purpose voltage regulators category. Designed with the aim of achieving superior transient response, the NCV51199PDR2G is well suited for printers, notebook computers, networking and industrial devices and is composed of several key components.

The frequency generator of the NCV51199PDR2G consists of a band gap reference, a watchdog timer and a programmable oscillator. The band gap reference is essentially a temperature-stable internal voltage reference with a level of about 1.20V. When the voltage of the reference dips, the oscillator output frequency increases to maintain the voltage at a fixed level. The watchdog timer, which operates independently from the oscillator, has the task of resetting the screen display during power-on, power-off and other operations.

The second major component of the NCV51199PDR2G is the input voltage supervisor (IVGS). This is essentially an operating voltage source detector that is used to ensure that the input voltage remains within a safe range for operation. The IVGS consists of a comparator, a voltage reference and a timer. The comparator compares the input voltage level with the reference voltage of the operating voltage source, and when the input voltage drops below the reference level, the comparator sets off an alarm. The timer then makes sure that the alarm only goes off after a certain length of time, instead of immediately when the input voltage drops.

In addition to the frequency generator and IVGS, the NCV51199PDR2G also includes an on/off control circuit, an output driver circuit, an overvoltage protection circuit and an undervoltage protection circuit. This array of components is aimed at providing a high level of protection against power fluctuations and defective outputs, thus making the IC suitable for a wide variety of applications. The output driver circuit is also designed to be efficient in energy usage, which is an added benefit.

The NCV51199PDR2G is a highly capable frequency generator and input voltage supervisor intended for the most demanding applications. By providing reliable and stable operation, the IC ensures the proper functioning of electronic devices in the most extreme conditions. It is especially suited for printer, notebooks, networking, and industrial applications and is able to cope with the most demanding power fluctuations and field conditions.

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