MAX22210ATJ+

MAX22210ATJ+ is a 36V, 3.8A stepper motor driver with integrated current sense and 128Microstep indexer. It is a 2-phase stepper motor driver and integrates two 36V, 3.8A MAX H-bridges. The H-bridge FETs have a very low impedance that results in high driving efficiency and minimal heat generated. The typical total RON (high side + low side) is 0.25ohm. It integrates an accurate current drive regulation circuit and a 128-micro step built-in indexer controlled by a STEP/DIR interface. The high micro stepping resolution and advanced control technique ensure smooth and quiet operation. The current flowing into the two low-side FETs is sensed by a no dissipative integrated current sensing (ICS) and it is then compared with the desired step threshold current. As soon as the bridge current exceeds the setpoint (ITRIP), the device enforces decay for a fixed OFF time (TOFF). Three decay modes are supported: slow, mixed, and adaptive. It is used in applications such as stepper motor drivers.

• Full-scale current configurable with external resistance
• One logic input (HFS) to improve current-control accuracy for low current values
• Built-in control with 128 microstep indexer, STEP/DIR interface
• Current-sense output (current monitor) (ISENA, ISENB)
• Overcurrent protection (OCP) for each power FET, UVLO
• Supply voltage range from 4.5V to 36V, quiescent current consumption is 2mA typical
• Thermal protection threshold temperature is 165°C typical at (TA = 25°C)
• Current sense output -3dB small signal bandwidth is 400KHz typical
• Enable time is 0.4μs maximum at (TA = 25°C)
• Operating temperature range from -40°C to 125°C, 32-lead TQFN package

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