NCP81128AMNTXG

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

NCP81128AMNTXG is a controller designed primarily for DC/DC buck switching converters. It belongs to the category of PMIC (Power Management ICs) voltage regulators that includes DC/DC switching controllers. The NCP81128AMNTXG is a monolithic integrated dc-to-dc controller that is optimized for low input, or power, voltage applications. Its wide input voltage range and the ability to drive a wide range of gate cycle frequencies result in a device that can provide high efficiency and low ripple on power stages from low voltage supplies.

In order to control the ultimate output of a DC/DC converter, the controller has to firstly observe the output for irregularity (depending upon the type of control loop employed) then adjust a duty cycle to the output power stage such that it will compensate for the irregularity. This is achieved via a feedback loop that monitors the output voltage, along with the duty cycle of the power stage, providing what is referred to as “pulse width modulation” (PWM) control. This type of control is usually implemented using a combination of hardware controllers as well as dedicated control software.

The NCP81128AMNTXG DC/DC switching controller is designed to be used in combination with a power MOSFET driver designed to supply the gate signals to the power MOSFETs (Metal Oxide Semiconductor Field Effect Transistors). The key features of the NCP81128AMNTXG include an adjustable switching frequency up to 500 KHz, an external soft-start circuit, an internal pull-down resistor, an over-voltage protection (OVP) circuit, an adjustable current limit, an adjustable power limit and protection against overtemperature.

The NCP81128AMNTXG offers adjustable output voltage. The advantage of adjustable output voltage makes the device very suitable to applications where the output voltage is not constant. It is designed to meet the needs of applications where the power amplifier design tolerance limits are tight or where the output voltage needs to be adjusted for testing and measurement purposes. The NCP81128AMNTXG also includes logic-level selectable inputs and adjustable soft-start time.

The NCP81128AMNTXG working principle is based on inductive storage boost regulator. This type of switching controller uses a combination of an inductor, a diode and a capacitor to store energy in the power inductor and to deliver it to the output when needed. The duty cycle of the power switch is used to regulate the average output voltage, and the power inductor stores energy to account for any inaccuracy in the duty cycle. The circuit works by switching a power switch (such as a transistor) at a set frequency and storing energy in the power inductor in order to supply peak load current while maintaining current regulation.

The main application areas for the NCP81128AMNTXG DC/DC switching controller are in mobile telephones, portable computers, game consoles, digital cameras, PDAs, etc. The device is suitable for both point-of-load (PoL) and sink-type converters. This type of controller is used in applications where fast transient response, high efficiency and small form factor are important. It is also used in communication systems and instrumentation applications. Other applications include power supplies for low power SoC or for powering low-power components in complex systems.

The NCP81128AMNTXG is a highly reliable device, built for long-term operation in applications where stability and dependability are paramount. The adjustable switching frequency, external softstart circuit, adjustable current and power limit protection, and the logic level selectable inputs provide the user with a wide range of options and flexibility in order to meet the requirements of various applications. The NCP81128AMNTXG is a cost-effective and reliable solution in DC/DC switching controller applications.

The specific data is subject to PDF, and the above content is for reference