N-Channel H-bridge Motor Driver: Drives One Bidirectional Brushed DC Motor, Two Unidirectional Brushed DC Motors, or Other Resistive and Inductive Loads Wide 4.5V to 37V Operating Voltage RDS(ON): 400mΩ @VM=24V, IOUT=1.0A, TA=25°C Continuous Load Capacity: 2.4A Up to 4.5A Peak Current Integrated Current Sensing and Regulation Supports 1.8V, 3.3V, 5V Logic Inputs Ultra-Low Power Sleep Mode Integrated protection features: – VM Undervoltage Lockout (UVLO) – Overcurrent Protection (OCP) – Thermal Shutdown (TSD) Package: ESOP8
The TMI8181 is a motor driver for wide variety of applications. The device integrates N-channel H- bridge, charge pump regulator, current sensing and regulation, current proportional output, and protection circuitry. The charge pump improves efficiency by allowing for high side N-channels MOSFETs and 100% duty cycle support. Integrated current sensing allows for the driver to regulate the motor current during start up and high load events. A current limit can be set with an adjustable external voltage reference. Additionally, the device provides an output current proportional to the motor load current. This can be used to detect motor stall or change in load conditions. A low-power sleep mode is provided to achieve ultra-low quiescent current draw. When using TMI8181, The logical pin will enter low power mode after continuously pulling down for at least 1ms; The device is fully protected from faults and short circuits, including undervoltage lockout (UVLO), output overcurrent protection (OCP), and device thermal shutdown (TSD).
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