TPS65580PWP

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TPS65580PWP Application Field and Working Principle

The Texas Instruments TPS65580PWP is a high-performance DC/DC synchronous buck converter that powers application processors, modem and other mobile devices using a single lithium-ion battery.

The TPS65580PWP is a high efficiency, programmable-frequency, synchronous buck converter. The device operates over an input voltage range of 2.9V to 6.0V and provides an adjustable output voltage of 0.6V to 3.6V. It features an internal 0.9A/1.8A switching MOSFETs, programmable frequency range of 400kHz to 1.2MHz, and output voltage precision capability of plus or minus 1 percent.

The TPS65580PWP is well suited for low power applications such as power-sensitive handheld devices and notebook computers due to its high efficiency and fast transient response. It also includes several wide range of integrated features such as power-good detection, thermal protection, overtemperature protection and short-circuit protection. Furthermore, the device supports multiple function On/Off mode, programmable soft-start, average mode control for EMI mitigation, and also includes a programmable voltage ramp rate.

TPS65580PWP Working Principle

The working principle of the TPS65580PWP is based on the concept of synchronous buck converters. The converter consists of two stages, the first being a high-speed power stage which takes the input voltage and decreases it to the required output voltage and the second being a control stage which regulates the output voltage. In order to operational, two clock signals, a switching clock and a dead clock, must be provided. The switching clock generates the pulse width modulation (PWM) signal to control the switchings of internal MOSFETS. For current mode control, the average inductor current is compared to the reference current by a differential amplifier to determine the duty cycle of the PWM signal. The dead clock ensures that the power MOSFET remains off for an interval of time, thus protecting the device from short-circuits. Additionally, the device`s power good output provides feedback indicating that the output voltage is within the tolerance range.

In addition to the synchronous buck topology, the device includes some other features like output voltage tracking, soft-start, and power-on-reset. The output tracking feature ensures that the output voltage tracks the input voltage. It also maintains a low-noise output voltage during start-up and other transients. The soft-start feature helps to minimize start-upInrush current. And the power-on reset feature keeps the converter in reset mode until the input voltage is above the regulatory threshold.

Conclusion

The TPS65580PWP is a high performance DC/DC synchronous buck converter that powers application processors, modem and other mobile devices using a single lithium-ion battery. It features a high efficiency and fast transient response, and several integrated features such as power-good detection, thermal protection, overtemperature protection and short-circuit protection. The device operates on a two-stage synchronous buck topology and includes multiple features such as output voltage tracking, soft start etc. It is ideal for low power applications such as power-sensitive handheld devices and notebook computers.

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