LB1838M-TRM-E

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The LB1838M-TRM-E is an advanced motor driver for high-efficiency and silent motor applications, developed by Rohm Semiconductor. It is primarily used in PMIC (power management IC) applications, and is configured as a medium-voltage motor control IC (MCU) with integrated current and temperature control, as well as integrated PWM (pulse-width modulation) control. The LB1838M-TRM-E is a versatile and robust solution for a wide variety of motor-drive applications.

The LB1838M-TRM-E operates as a low-voltage motor controller with integrated current and temperature control. It supports operation with either an externally controlled PWM signal or a dedicated free-running PWM, and is designed for single-celled operation. The motor-drive circuit is protected from over-current and overvoltage, and the input voltage range is from 3 V to 18 V. It also has an internal reference voltage source that can be adjusted for higher current accuracy.

The temperature protection functions of the LB1838M-TRM-E are designed to help protect the motor from thermal damage. It features two temperature-sensing channels, one for the motor and one for the external power source. The thermal control circuit is set to shut down the motor\'s drive circuit when the temperature of either channel exceeds a predetermined limit. In addition, an alarm output is provided to indicate when the temperature of either channel exceeds the limit.

The built-in PWM control circuit of the LB1838M-TRM-E can be operated in either an externally controlled PWM mode or a dedicated free-running PWM mode. The externally controlled PWM mode allows the user to program the duty cycle of the PWM output to create a customized current profile, while the dedicated free-running PWM mode allows the user to select a pre-programmed duty cycle from a library of 12 pre-defined profiles. Each of the 12 profiles has been optimized for different motor applications, and can be used to achieve high efficiency and low idle current.

The LB1838M-TRM-E motor driver also offers advanced protection functions to ensure reliable operation. It includes a built-in power-on reset, an undervoltage lockout, and an overcurrent protection circuit, all of which are designed to prevent possible damage to the motor or the drive circuit. Additionally, the IC includes a built-in soft-start circuit to gradually turn the motor on from a stationary state, which helps eliminate any sudden surge currents.

In conclusion, the LB1838M-TRM-E is an advanced motor driver for high-efficiency and silent motor applications. It is designed for PMIC (power management IC) applications, and offers strong protection features and a versatile motor control circuit. It also offers a wide range of PWM control options, as well as temperature protection, allowing it to be used in a wide variety of motor-drive applications.

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