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PMIC - Voltage Regulators - Special Purpose

Introduction

PM6680TR is a high-performance pulse-width modulation (PWM) voltage regulator whose output is adjustable. Developed by Power Management Integrated Circuit (PMIC) manufacturer STMicroelectronics (SMT), this product supports 20A continuous output current. Its main applications include power conversion and distribution, automotive engine systems, and industrial automation.

Application Field and Working Principle

The PM6680TR is a four-channel voltage regulator that integrates two active low-side (ALS) and two active high-side (AHS) channels. This PWM voltage regulator is integrated in two independent quadrants, The AM6680TR is intended primarily for motor control use, and it targets automotive, industrial, and motor control applications. It can also be used in any application where there is a need for precise output current control.

The PM6680TR utilizes Pulse-Width Modulation (PWM) technology to ensure a constant voltage output. As the voltage output in a PWM regulator is consequently based on its frequency, the PM6680TR uses a precision oscillator to maintain a particular frequency and deliver consistent voltage outputs. This principle is best explained by the following diagram:

The PM6680TR consists of four main components; the control signal, a low-side (LS) driver, a high-side (HS) driver, and an oscillator to provide the required signal to control the frequency and the resulting output of the regulator. When the control signal is pulsed on, the LS and the HS drivers are turned on and off to produce the specified frequency and voltage output. The resistor R1 and C1 are used to determine the overall frequency. Thus, by adjusting these values, a wide range of voltages can be easily achieved.

Advantages of PM6680TR

Apart from its easily adjustable voltage output and high current carrying capacity, the PM6680TR offers several advantages over other PWM regulators, such as lower power dissipation, improved efficiency, and the ability to operate in both parallel and synchronous mode. The PM6680TR is also protected against power surges, overloads and short circuit. It is also equipped with pre-programmed safety features such as over-voltage protection, under-voltage protection, short-circuit protection, and over-temperature protection.

The PM6680TR\'s compliant current control and output accuracy over the entire temperature range makes this regulator suitable for a wide variety of applications. In addition, the PM6680TR supports several integrated fault and reset functions, making it an ideal solution for motor control applications.

Conclusion

The PM6680TR is a high-performance, pulse-width modulation (PWM) voltage regulator that integrates two active low-side and two active high-side channels. This PWM voltage regulator is equipped with several safety and fault functions, making it suitable for a wide range of applications. It is also protected against power surges, overloads, and short circuits, and offers a precise and consistent voltage output.

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