L6235Q

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The L6235Q is a highly integrated DMOS driver suitable for driving large DC motors up to 2.2A in a small footprint, particularly suitable for three-phase brushless DC motors. It offers several features such as overload protection, Motor lock-detection, current information, and PWM current control. This device integrates three full-brige DMOS outputs controlled by motor control logic to drive external N-channel MOSFETs. This enables it to eliminate external drive stage, providing space and cost savings. Thereby, a fully integrated 3-phase BLDC motor driver with optional current control can easily be implemented.

The L6235Q Motor Driver IC is designed to operate in a wide voltage range from 4.5V to 40V. It is suitable for a variety of applications such as computer printers, washing machines, air-conditioners, motors, pumps and compressors. It is able to control six DMOS FETs with built-in low resistance, which eliminates the need for additional drivers. The L6235Q Motor Driver IC offers a wide range of features such as over-current protection, self-startup logic, motor lock detection, and PWM current control. It requires very small size of current sense resistor, which can further reduce the system size. The IC also provides several failsafe and protection features such as over temperature protection, power-up reset and undervoltage lockout.

The working principle of the L6235Q Motor Driver IC is based on the PWM current control. It controls the motor current by varying the PWM duty cycle without changing the voltage level. It is capable of sensing the output current by using an internal low on-resistance sense FET. The current information is then used to modify the PWM duty cycle so that the output current is maintained at the desired level, thus eliminating the need for an external current protection circuit. The driver also provides protection for the motor in the event of an unexpected over-current condition.

The motor control logic used in the L6235Q Motor Driver IC is based on a 3-phase full-rest, which converts the three-phase input signals into a series of PWM pulses. This logic also includes several features such as motor lock protection and startup logic, allowing the driver to monitor the rotor position when the motor is running and start the motor when it has stalled. The PWM current control enabled by the L6235Q Motor Driver IC allows the motor to be driven with a higher efficiency compared to other systems, as the output voltage is independent of the output current.

In summary, the L6235Q Motor Driver IC is a highly innovative and efficient driver for controlling DC motors up to 2.2A in a very small form factor. It is well suited for applications requiring maximum performance, reliability and low power consumption. It provides a wide range of protection and control features, increasing the user flexibility and allowing a wide range of applications.

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