UCC28950QPWRQ1 Integrated Circuits (ICs)

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The UCC28950QPWRQ1 voltage regulator is a part of Texas Instruments\' family of DC-DC switching controllers, integrated with two high-side switches and two low-side switches for respectively matching step-down (buck) and step-up (boost) non isolated conversion. These devices offer high integration, full feature solutions for a wide range of complex power requirements.

The UCC28950QPWRQ1 is especially suitable for applications wishing to control the output voltage by a PWM frequency, such as in battery management systems, or voltage regulators with current-mode control. It features a comprehensive set of features and protection structures that facilitate start-up and its integration into high performance systems.

Application Field of the UCC28950QPWRQ1

The UCC28950QPWRQ1 voltage regulator is primarily intended for use in mobile phones and other portable devices, as well as medium and high power battery-operated systems. Its application field is quite vast, for it can be used for industrial, automotive and consumer applications, where efficient and compact power management systems are required.

The UCC28950QPWRQ1\'s integrated circuits are specifically designed for point-of-load (POL) solutions, such as telecommunications, portable media players, PC peripherals and network devices. The device delivers low quiescent current operation, an adjustable switching frequency range up to 4 MHz, and adjustable output voltage for high power applications.

Working Principle of the UCC28950QPWRQ1

The UCC28950QPWRQ1 is a current mode switching controller with a pulse-width-modulated output. It works on the principle of voltage regulation, meaning that it operates by converting a given input voltage level to a different, usually regulated, output voltage. It does this by drawing current from the output load, regulating it to a particular level, and then providing that current back to the load.

The UCC28950QPWRQ1 uses an integrated high-side switching MOSFET and low-side switching MOSFET, both connected to the input voltage source and the output load terminal, respectively. It enables both low-side and high-side driving of the output load, allowing the system to use any available combination of differential output voltages and load currents.

The current mode control of the UCC28950QPWRQ1 helps it achieve optimum output voltage accuracy and excellent transient response, up to 5 A peak output current and 0.6 A no-load quiescent current.

The UCC28950QPWRQ1 has a high-efficiency two-level synchronous operation with the peak current mode. It provides current safe start-up and 4 MHz adjustable switching frequency. Furthermore, the device offers linear automatic frequency fold-back feature, with switching frequency and slope compensation for precise output voltage levels over large temperature ranges, even during transients and large load changes. Its output voltage can be trimmed down, for improved output voltage accuracy.

The UCC28950QPWRQ1 also offers a wide range of protection features, including over-temperature protection, output voltage over-voltage protection and current limit protection. In addition, the device includes an adjustable soft-start feature and synchronization to external clock sources. All these features combined make the UCC28950QPWRQ1 a powerful and versatile voltage regulator.

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