TPS54312PWP

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TPS54312PWP Application Field and Working Principle

TPS54312PWP is a DC-DC switching regulator, a programmable constant frequency buck controller with built-in synchronous rectification and embedded protections. It is designed for high current, low output voltage applications, such as those that use CPUs, GPUs, FPGAs, ASICs, and motor drivers.

The TPS54312PWP is a programmable switching regulator which can convert unregulated input voltages from 2.7V to 14.4V into an adjustable regulated voltage from 0.8V to 5.5V. The device features built-in linear and overvoltage protection, as well as a programmable frequency from 300kHz to 3MHz.

Applications

TPS54312PWP is well suited to applications where efficient power conversion is needed, with minimal external components. Applications include networking, communication, broadband, gaming, automotive, industrial, and medical.

Working Principle

The TPS54312PWP utilizes a Variable Frequency Pulse Width Modulation (VFPWM) control scheme to achieve high efficiency. The VFPWM control implements a “LOOK-UP” table which is used to optimize switching frequency and output regulation accuracy across the entire input and load ranges. It also features frequency dithering mode, which ensures minimal audible noise, improves EMI performance, and decreases switching losses.

The TPS54312PWP operates at a fixed frequency of up to 3MHz, eliminating the need for external oscillators and loop compensation, making it easy to use. The device offers a programmable current limit, which can be used to optimize safety and thermal performance, and eliminate the need for external current-sense resistors. Output voltage is adjustable through an external voltage divider, and can be adjusted to within ±1% accuracy.

The device also offers two output voltage slew-rate modes: fixed-rate and programmable. The fixed-rate mode is ideal for applications such at those found in consumer electronics, while the programmable mode supports high power applications such as server, gaming, or other specialty equipment.

Conclusion

The TPS54312PWP is an advanced DC-DC switching regulator designed for high-efficiency, low output voltage applications. It is perfect for applications such as communication, networking, and consumer electronics and features built-in linear and overvoltage protection, as well as a programmable frequency from 300kHz to 3MHz. The device works by utilizing a Variable Frequency Pulse Width Modulation (VFPWM) control scheme, features a programmable current limit, and offers adjustable output voltage through an external voltage divider. Thanks to these features and its ease-of-use, the TPS54312PWP is an ideal choice for those searching for reliable and efficient DC-DC switching regulator.

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