NCP1573DR2

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Power Management Integrated Circuit (PMIC) - Voltage Regulators - DC DC Switching Controllers: NCP1573DR2 Application Field and Working Principle

Power Management Integrated Circuit (PMIC) refer to an integrated circuit which is dedicated for the power management of an electronic device. It directly drives the output voltage’s range by controlling and adjust the gain with feedback control. The switching controller is the core component of PMIC and provides high-speed, energy-efficient power control.

DC DC Switching Controllers, as an important part of PMIC, are responsible for regulating, controlling and maintaining the required voltage. DC-DC switching controllers are widely used in chip-level power management applications. NCP1573DR2 is a popular DC-DC switching controller and it uses Pulse Width Modulation (PWM) to restore and keep the output voltage level within a given range.

Application Field of NCP1573DR2

NCP1573DR2 is suitable for applications like portable electronic products and foldable electronic equipment with low power consumption. The device is featured by soft mode start-up, low ripple, highlight protection and a wide range of power supply voltage. It can provide output current up to 1.5A and it is widely used in the following areas:

• Portable computing
• Portable communications
• Digital Cameras
• Wearable Device
• Laptop PCs

Working Principle of NCP1573DR2

NCP1573DR2 uses Pulse Width Modulation (PWM) to restore and keep the output voltage level within a given range. The output is driven by an external controller to adjust the width of the pulse. The overvoltage protection circuit is integrated to detect overvoltage situations and immediately shut down the device.

The overall switching control loop of the NCP1573DR2 is composed of a control loop and a protection loop, both of which are integrated into a single IC. The control loop is the main loop which is responsible for controlling the behaviour of the device. With its functions such as soft start-up, overvoltage protection, thermal shutdown, undervoltage lockout, current limit protection and short circuit protection, it can keep the output voltage constant.

The protection loop is responsible for detecting any fault and then immediately shut down the device. The circuit provides overvoltage and overcurrent protections which help protect the device from any fault and provide reliable operation. The protection loop also includes two comparators, an overvoltage comparator and an overcurrent comparator, which detect the output voltage and current.

When an abnormal current occurs, the overcurrent comparator sends an overcurrent signal to the protection switch and the PWM device is shut down immediately and disconnected from the load. At the same time, the overvoltage comparator also sends an overvoltage signal to the protection switch and it will also shut down the PWM device and disconnect the load.

The input port and output port of NCP1573DR2 have dedicated pins so that the two pins can be connected in parallel or in series and provide sufficient currents for the load. NCP1573DR2 provides overvoltage protection, overcurrent limit protection and short circuit protection, which makes it suitable for various applications which require power management.

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