Click here to ask an associate for production status of specific part numbers. MAX22204 65V, 3.8A Stepper Motor Driver with Integrated Current-Sense and 128 Usteps Indexer General Description Applications The MAX22204 is a two-phase stepper motor driver. It Stepper Motor Driver integrates two 65V, 3.8A H-Bridges. The H-Bridge MAX FETs have very low impedance, resulting in high driving Benefits and Features efficiency and minimal heat. The typical total R (high- ON Two H-Bridges with +65V Voltage Rating side + low-side) is 0.3. The MAX22204 integrates an ac- Total Rdson (High-Side + Low-Side): 300m curate current drive regulation circuit and a 128-microstep Typical (T = 25C) A built-in indexer controlled by a STEP/DIR interface. The Current Ratings per H-Bridge (Typical at T = 25C): A high microstep resolution and advanced control technique ensure smooth and quiet operations. I = 3.8A (Impulsive Current for Driving MAX MAX Capacitive Loads) The current flowing into the two low-side FETs is sensed I = 2.8A (Maximum Full Scale Current FS(MAX) by a non-dissipative Integrated Current Sensing (ICS) and Setting for Internal Current Drive Regulation) it is then compared with the desired step threshold current. I = 2A per Phase (T = 25C, V = +24V) RMS RMS A M As soon as the bridge current exceeds the threshold (I ), the device enforces the decay for a fixed OFF-time Integrated Current Control TRIP (t ). Full-Scale DAC Current Configurable with External OFF Resistance The non-dissipative ICS eliminates the bulky external One Logic Input (TRQ) to Quickly Change the power resistors normally required for this function, result- Torque among Two Levels ing in a dramatic space and power saving compared with Internal Current Sensing (ICS) Eliminates External mainstream applications based on the external sense re- Bulky Resistors and Improves Efficiency sistor. Currents proportional to the internally-sensed Built-in-Control with 128-usteps Indexer bridge currents are output to pins ISENA and ISENB. By STEP/DIR Interface connecting external resistors to these pins, voltages pro- Integrated DAC and Sequencer for U-Stepping portional to the bridge currents are generated. These can Multiple Decay Modes (Slow, Mixed, Adaptive) be used for diagnostic purposes. Fixed OFF Time Configurable with External The maximum output current per H-Bridge is I = MAX Resistance 3.8A limited by the Overcurrent Protection (OCP). The MAX Current-Sense Output (ISENA, ISENB) Current device delivers up to 2A per phase at V = +24V and RMS M Monitor T = 25C with proper PCB ground plane for thermal dis- A Fault Indicator Pin (FAULT) sipation. The current capability depends on the PCB ther- Protections mal characteristic (PCB ground planes, heatsinks, ventila- Overcurrent Protection for each Individual Channel tion, etc.) (OCP) The maximum full-scale current per H-Bridge is I = 2.8A FS Undervoltage Lockout (UVLO) and can be set by an external resistor connected from the Thermal Shutdown T = 155C (TSD) J REF pin to GND. This current is defined as the maximum TQFN38 5mm x 7mm Package (TSSOP38 4.4mm x current setting of the integrated drive regulation circuit. 9.7mm Available in the Future) One logic input (TRQ) allows to quickly change the current setting among two different values for fast torque control. The MAX22204 features Overcurrent Protection (OCP), Thermal Shutdown (TSD), and Undervoltage Lockout (UVLO). An open drain active low FAULT pin is activated every time a fault condition is detected. During Thermal Shutdown and Undervoltage Lockout, the driver is dis- abled until normal operating conditions are restored. The MAX22204 is packaged into a TQFN38 5mm x 7mm package. Ordering Information appears at end of data sheet. 19-101089 Rev 0 8/21 2021 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. One Analog Way, Wilmington, MA 01887 U.S.A. Tel: 781.329.4700 2021 Analog Devices, Inc. All rights reserved.MAX22204 65V, 3.8A Stepper Motor Driver with Integrated Current-Sense and 128 Usteps Indexer Simplified Block Diagram VM = +4.5V to +65V STEP, DIR OUT1A ISEN STEPPER FAULT OUT2A MODE MAX22204 EN, SLEEP STEPPER MOTOR DRIVER DECAY , TRQ OUT1B ROFF 128 STEP INDEXER REF OUT2B RROFF R REF www.analog.com Analog Devices 2 CONTROLLER