TPS54972PWPG4

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Generating and regulating clean and reliable power is essential in designs that incorporate multiple system components and microprocessors. Having the precise voltage, current and frequency available can help to ensure the long term operation, reliability and accuracy of connected systems. One such device, the TPS54972PWPG4, is a dual-channel integrated high-current switching point voltage regulator. This device is part of a class of products known as special purpose voltage regulators and is used in a variety of operations including automotive, communications, and medical devices. This article will provide an overview of the application field and working principle behind the TPS54972PWPG4.

The TPS54972PWPG4 is part of Texas Instruments\' TPS549xx family of solutions which support high-switching point and continuous current power solutions for industrial, renewable energy, and automotive applications. This particular device is designed for dual channel applications where isolation is required between the points, such as in automotive systems. The TPS54972PWPG4 regulates the voltage of each channel at preset levels, allowing the system designer to achieve accuracy while regulating the voltage output.

The TPS54972PWPG4 is designed with an input range of 8 V to 16 V, and an output voltage adjustable from 0.7 V to 18 V. Operating from a temperature range of -40°C to 125°C, the device is able to survive shocks up to 2000 Gs. The TPS54972PWPG4 also features a softstart limit, allowing the output voltage of each channel to ramp up gradually over time, and reduce inrush peak current. Additionally, built-in short circuit and over temperature protection features help to ensure the longevity and reliability of connected systems.

The TPS54972PWPG4 is based on a buck-boost architecture that features a power stage and either an internal or external control separately optimized for each channel. The power stage consists of high and low side MOSFETs and illustrated in Figure 1. The control logic drives the gate of the high side MOSFET and determines the duty cycle of each cycle of the switching regulator. The switching frequency is fixed for each device and typically in the range of 200 KHz to 1 MHz.

As previously mentioned, the TPS54972PWPG4 is designed for dual-channel applications in order to provide safety isolation between each point. This is achieved by placing two separate switches in parallel for each channel as further illustrated in Figure 1. The device also includes a shutdown mode to save power when the system is not in use.

The TPS54972PWPG4 is well suited for applications where multiple system components or processors must be powered. Its integrated buck-boost architecture and accompanying features make it an ideal solution for automotive, renewable energy, and industrial applications. Its dual-channel design ensures each point is safely isolated and its built-in protections allow the system designer to achieve accuracy and reliability while regulating the voltage output.

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