L6225PDTR

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The L6225PDTR is a member of STMicroelectronics’ comprehensive portfolio of advanced integrated single-channel motor driver circuits for brush-type dc motors, especially suited for Automotive On-Board Diagnostics (OBD) applications. It is an integrated bridge driver with full bridge, chip enable and directional control inputs, allowing it to drive bidirectional motors.

The device comes in a 6-pin PowerSSO package, with a maximum operating temperature of 105°C, and a storage temperature range of -105°C to +150°C. It features high resistance to higher levels of reverse polarity and ESD current, providing improved reliability in automotive applications.

In terms of application fields, the L6225PDTR is designed for automotive on-board diagnostics (OBD) applications, such as EGR valves, turbochargers, fuel injection systems, and exhaust gas recirculation systems. It is also suitable for motor control applications in the medical, industrial, and consumer sectors, including general purpose 3-phase motor driving, and HVAC (heating, ventilation, and air conditioning) applications.

The L6225PDTR is built using a MOFSET Mx-STF based fullH-bridge architecture offering efficient bidirectional control over a wide range of motors. This high-efficiency architecture provides benefits such as low power dissipation and a high tolerance to temperature and voltage variations. The device also offers a high level of protection including ESD protection and reverse polarity protection.

The device features an on-chip internal current limit, which can be set by an external resistor, allowing users to set the current level to suit their application. Additionally, the device offers optional protection features such as thermal shutdown with an adjustable junction temperature. This provides a level of protection to the motor, driver, and device against damage due to excessive current.

The device also features a pulse-by-pulse current limit, which is used to limit the maximum current. This is used to protect the device and the motor in case of a short circuit condition, and also allows the motor to run in a low-current condition for improved efficiency. Additionally, the device can detect a fault (over-current or overtemperature) and drive the output to a low-impedance state.

The L6225PDTR also offers low-resistance gate drivers, which enable fast switching of the device. This feature helps to reduce switching losses, resulting in improved efficiency and lower power dissipation. Additionally, the device includes an adjustable dead-time, which can be used to improve the stability of the control loop.

The operating range of the device is from 3.1V to 28V, making it suitable for use in automotive applications. The maximum continuous output current is 2A, and the pulse current can be limited to 6A. The maximum peak voltage is 25V.

In summary, the L6225PDTR motor driver is a highly integrated and efficient single-channel motor driver, capable of driving bidirectional DC motors. It is designed for use in automotive OBD applications, as well as motor control applications in the medical, industrial, and consumer sectors. The device features an on-chip current limit, which can be set by an external resistor, along with an adjustable dead-time for improved stability. Additionally, the device includes low-resistance gate drivers for fast switching, and protection features such as ESD protection and reverse polarity protection.

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