PM6670ASTR

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PM6670ASTR Application Field and Working Principle

The PM6670ASTR is a specialized power management integrated circuit (PMIC) designed for use in electronic devices needing control systems to regulate the direction and magnitude of current. It is typically used in digital signal processing (DSP) applications providing long battery life in mobile electronics, Power-over-Ethernet (POE) applications, or in wireless infrastructure base stations. This document discusses the PM6670ASTR\'s application field and working principle.

Application Field

The PM6670ASTR is a 3-phase buck regulator specialized for use in DSPs, CPUs, and other processors. It operates from a 5V to 28V input and provides an adjustable 3.3 V output. It is highly efficient, providing up to 95% power conversion efficiency. Additionally, it includes many built-in protection features to ensure system reliability, including undervoltage lockout, input overvoltage protection, output over-current protection, thermal shutdown, and overvoltage protection.

The device also contains advanced features designed to further improve system efficiency and performance, including pulse-width modulation (PWM) synchronous rectification, current mode control, dead time control, and adjustable frequency (up to 2MHz).

The PM6670ASTR is the ideal solution for applications requiring high-efficiency power control, such as digital signal processing in mobile phones and digital signal processor (DSP) applications, or in any application requiring Power-over-Ethernet or wireless infrastructure.

Working Principle

The PM6670ASTR is a 3-phase synchronous buck regulator. It utilizes pulse-width modulation to control the output voltage of the circuit, with current mode control to optimize efficiency. The device employs a synchronous rectification scheme using an integrated high-side and low-side switch. This allows for higher efficiency than traditional diode-rectified switching systems.

The PM6670ASTR includes several control and protection features to ensure safe and efficient operation. It includes an adjustable deadtime control to optimize switching efficiency and reduce switching losses, and a current mode control loop to maintain accuracy and stability under transient conditions. Additionally, it features undervoltage lockout to prevent the device from starting up when the input voltage is too low and overvoltage protection to guard against malfunction in the event of an input overvoltage.

The PM6670ASTR also contains protection against overcurrent, thermal shutdown, and input overvoltage. It also has an adjustable switching frequency, with a range of up to 2MHz, allowing the device to be optimized for efficiency and system performance.

Conclusion

The PM6670ASTR is a specialized power management integrated circuit (PMIC) designed for use in digital signal processing (DSP) applications. It is a highly efficient, 3-phase synchronous buck regulator with many built-in protection features to ensure system reliability. It includes advanced features such as pulse-width modulation synchronous rectification, current-mode control, adjustable frequency (up to 2MHz) and dead time control.

The PM6670ASTR is the ideal solution for applications requiring high-efficiency power control, such as digital signal processing in mobile phones and digital signal processor (DSP) applications, or in any application requiring Power-over-Ethernet or wireless infrastructure.

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