STK625-201MK-E

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The STK625-201MK-E is a motor driver/controller integrated circuit (IC) designed to drive permanent magnet DC motors. It is categorized under power management ICs (PMICs) as a motor driver and controller package.

This motor driver/controller is designed to save space and cost for motor control applications. It integrates an H­bridge, two PWM controllers, and two comparator circuits with the required driver circuits in a single package. This motor driver/controller operates from a wide input voltage range (from 4.2V to 18V) and includes an internal regulator to set the operating voltage to the recommended 3V (2.5 to 3.5V) range.

The STK625-201MK-E features a high internal impedance structure and a low-noise structure that can achieve low power consumption. This motor driver/controller also features a reverse current protection circuit and a current detection circuit for overcurrent protection. With high-current capabilities (up to 1.5A) and a low quiescent current of 8mA, it is ideally suitable for applications such as DC motor control, small motor control, electronics hair clippers, power saws, and exercise bike motor control.

This motor driver/controller has a PWM input and enables both forward and reverse motor drive currents. The two PWM input pins enable two independent PWM control of two DC motors. This allows for independent control of two dc motors with two PWM signals.

The STK625-201MK-E features a slew rate control circuit that improves system accuracy and stability. This circuit sets the current rise and fall times so that the error at the PWM output is reduced. The back EMF protection feature prevents breakdown which may be caused by spurious signals caused by the back EMF induction present in a DC motor.

The STK625-201MK-E’s integrated comparator circuits use the onboard reference voltage and PWM logic to detect an overcurrent condition. This feature simplifies the task of designing a motor driver and helps protect the motor and protecting the system from overcurrent conditions. The STK625-201MK-E also includes an RC filter function that improves the noise generated when a motor is operated.

Finally, the STK625-201MK-E incorporates a voltage divider circuit and a current-limiting circuit for the 2.2V voltage regulator. This provides a stable and cost-effective power supply for the unit, eliminating the need for a separate power supply and providing a single, integrated solution.

In summary, the STK625-201MK-E is a highly integrated motor driver/controller IC which offers high current capacity and low power consumption in a single package. Its reverse current protection, PWM input, comparator/current limitation, RC filter, and voltage divider features make it an ideal solution for a wide variety of motor control applications.

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