STK672-340-E

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PMIC (Power Management Integrated Circuit) and motor drivers, controllers are two areas of power electronics. This article focuses on the STK672-340-E, a PMIC- motor driver and controller. The STK672-340-E is used in a variety of applications including automotive and industrial control systems, mobile devices, and telecommunications.

The STK672-340-E PMIC is a three-phase synchronous step-down with integrated high-side and low-side power MOSFETs, protected output stages and a high-efficiency (up to 95%) synchronous-rectification buck converter. With its integrated FETs and protection stages, the STK672-340-E allows for a compact, efficient, and reliable PMIC.

The STK672-340-E operates in a PWM (pulse width modulation) mode, which allows for pulse width modulation of the output voltage and current in order to reduce power consumption and increase efficiency. This modulated frequency is typically determined by the system clock. The STK672-340-E also offers current sensing capabilities, an adjustable maximum frequency, and supports up to 80A continuous current.

At the heart of the STK672-340-E is its control logic, which is used to regulate the output voltage. The control logic has two different components: a constant-frequency hysteretic control that consists of charge and discharge circuits, and a peak current-mode control. The constant-frequency hysteretic control determines the peak current limit and also determines the maximum Switching frequency, while the peak current-mode control limits the peak current and thereby provides feedback to regulate the output voltage.

The STK672-340-E is designed for system protection and reliability. An integrated reference voltage ensures stable operation, while the built-in overcurrent protection and thermal shutdown protect the system from excessive current and heat buildup. Additionally, an adjustable soft-start and an adjustable overvoltage protection circuit further protect the system.

The STK672-340-E has been tested for safety and reliability and was certified for UL and EN/IEC standards. In addition, the STK672-340-E has been tested and shown to meet automotive performance standards such as AEC-Q100 and CMU/CC.

The STK672-340-E provides excellent flexibility, performance, and protection in motor drive and control applications. It is well suited for mobile devices, automotive and industrial control systems, and telecommunications applications. With its integrated FETs, protection stages, and adjustable features, the STK672-340-E offers an efficient, reliable, and cost-effective solution for motor control and power management.

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