NCP1402SN19T1

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The NCP1402SN19T1 is a high-efficiency, high-performance, single-stage DC-DC converter. It is integrated into a small TDFN-8 package and offers a wide input voltage range of 6 V to 30 V. This switching regulator features an excellent maximum efficiency of 97%. It has a wide switching frequency range of 250 kHz to 1 MHz, which enables a small and cost-effective external inductor and capacitor, as well as fast transient response.

The NCP1402SN19T1 is suitable for a variety of applications, including power management in consumer electronics, industrial, automotive, and telecommunications equipment. Its integrated high-side N-channel MOSFET switch, with a current rating of 1.2 A, ensures high reliability in a wide range of applications.

The NCP1402SN19T1 can take either pulse-width modulation (PWM) or pulse-frequency modulation (PFM) as the input and convert this into an output voltage of 1.2 V to 5 V. This switching regulator drops input voltage to the output voltage and provides up to 1.2 A of constant current.

The working principle of NCP1402SN19T1 consists of two major parts. The first is referred to as a step-down or buck converter, involving an input stage and a switching stage. The input stage consists of a transformer (or a voltage divider) that reduces the input voltage. The switching stage consists of two switching transistors, an inductor, and two diodes. The two transistors switch between the two voltage swings to produce the output voltage.

The second part of the NCP1402SN19T1 working principle is the current-mode control. This mode is used for controlling the output current and to ensure that the output current remains constant despite variations of load and input voltage. The current-mode control uses an error amplifier and a comparator. The error amplifier compares the output voltage with the reference voltage and generates the error signal. The comparator compares the error signal with the feedback voltage and switches the two transistors accordingly.

In conclusion, the NCP1402SN19T1 is a high-efficiency, high-performance, single-stage DC-DC converter. It is integrated into a small TDFN-8 package and offers a wide input voltage range of 6 V to 30 V. It is suitable for a variety of applications, including power management in consumer electronics, industrial, automotive, and telecommunications equipment. It is based on the two principles of step-down or buck converter and current-mode control to drop the input voltage to the desired output voltage and provide the necessary output current.

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