L6235N Integrated Circuits (ICs)

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The L6235N is an integrated power stage solution for low voltage three-phase brushless DC motor (BLDCM) applications. The device offers: high power density, excellent power efficiency and integrated protection for current limitation, motor thermal detection, overvoltage and undervoltage protection, as well as short-circuit protection. The device is designed to be driven by microcontrollers and can be operated with an external pull-up or pull-down PWM. As a motor power supply and control solution, the L6235N is ideal for applications such a home appliances, office automation, and even automotive.

The L6235N can operate from a wide, 6 to 36V DC, input range. The package is a TQFN rated at 0.5mm pitch and suits medium to high volume production. It comes with a maximum current capability of 5-amps, driven by built-in Nmos power switches. PMOS technology also ensures fast switching to reduce electromagnetic interference (EMI). The device also includes a current detection circuit as well as protection features such as Under-Voltage Lockout (UVLO), logic supply Over-Voltage (OVP) protection, Logic supply Under-Voltage (UVP) protection

The L6235N is an attractive solution for brushless DC motor applications due to its high power density and power efficiency. The device also has integrated protection mechanisms for current and voltage, making it a highly robust solution for motor control. An external pull-up/Pull-down PWM driver for motor control allows for greater flexibility in controlling motor speeds, and a 0.5mm pitch TQFN package allows for easier assembly in high-volume production.

In terms of the L6235N\'s working principle, the device follows a standard three-phase bridge structure where each bridge consists of two N-channel MOSFETs for low on-resistance and fast switching. The device includes an internal current detection circuit as well as safety features such as Under-Voltage Lockout (UVLO), logic supply Over-Voltage (OVP) protection, Logic supply Under-Voltage (UVP) protection.

In terms of operation, the external PWM signal is used to drive the power MOSFETs resulting in a 3-phase wheel control. By adjusting the PWM position and duty cycle, the device can control the speed of the motor. The device also includes logic inputs such as enable to enable or disable the controller, stop to stop the motor, and restart enable for restarting the motor in the opposite direction. In addition, the device includes fault/protection features like motor over temperature, over current detection, peak correction, and short circuit protection.

The L6235N is an innovative solution for controlling brushless DC motors in a wide range of applications, due to its integrated protection features, low-side power switches, fast switching for reduced EMI, and adjustable PWM signal for controlling the motor speed. With its robustness and high power density, the L6235N is the ideal solution for any application needing a reliable motor control solution.

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