UCC3952PW-2

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UCC3952PW-2

UCC3952PW-2 belongs to PMIC (Power Management IC), Battery Management IC. It is a high-performance, low-power Buck converter chip with embedded Power Path Management (PPM) and embedded current-mode step-down dc-dc converter. It also has a system-level interface communication module, which allows multiple devices in the system to report system status. UCC3952PW-2 is widely used in mobile phone batteries and other portable device battery management systems.

Application field

The UCC3952PW-2 is a low-power, low-noise integrated buck converter that can provide voltage conversion from 0.8V to 5.5V to the attached load. It has a built-in system-level interface for information exchange and can operate at switching frequencies up to 1 MHz. It provides high efficiency, up to 95%, together with low output ripple, wide input voltage range and low EMI pollution. It is suitable for a variety of battery charging solutions, such as mobile phones and other portable electronic products, to protect battery life.

Working Principle

The PPM embedded in the UCC3952PW-2 is a communication module between the chip and the system. It can supply data information to the system, and receive commands and settings from the system. The PPM module provides an asynchronous serial interface (SPI) that can be used to send data to (or receive it from) other system components. It integrates with the other main functions of the chip, such as the current-mode buck converter and its auxiliary functions, such as voltage regulation, protection circuitry, and power sequence control.

The integrated current-mode buck converter of the UCC3952PW-2 is based on a hysteretic control method that combines constant-current/constant-voltage characteristics. Hysteretic control achieved by employing two thresholds in the regulation loop: voltage level and current level. When the output voltage drops below the lower threshold, the device is triggered on, and when the output voltage exceeds the upper threshold, the device is switched off.

The UCC3952PW-2 also has an internal power management circuit which is used to drive the integrated step-down MOSFET switches at high frequency and therefore to provide a high efficiency and low EMI solution. This power transistors are internally connected to the power path management (PPM) interface. They can control the voltage/current level or even the system initialization processes.

With its sophisticated RDSON and PPM technologies, the UCC3952PW-2 can be used in a variety of power management systems to achieve energy efficiency and minimize system costs. It is the most suitable choice for mobile phone and other portable applications.

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