MAX22204
RECOMMENDED FOR NEW DESIGNS65V, 3.8A Stepper Motor Driver with Integrated Current-Sense and 128 Usteps Indexer
Industry’s Smallest 65V Stepper Solution with Microstepping
- Part Models
- 4
- 1ku List Price
- Starting From $2.14
Part Details
- Two H-Bridges with +65V Voltage Rating
- Total Rdson (High-Side + Low-Side): 300mΩ Typical (TA = 25°C)
- Current Ratings per H-Bridge (Typical at TA = 25°C):
- IMAX = 8AMAX (Impulsive Current for Driving Capacitive Loads)
- IFS(MAX) = 8A (Maximum Full Scale Current Setting for Internal Current Drive Regulation)
- IRMS = 2ARMS per Phase (TA = 25°C, VM = +24V)
- Integrated Current Control
- Full-Scale DAC Current Configurable with External Resistance
- One Logic Input (TRQ) to Quickly Change the Torque among Two Levels
- Internal Current Sensing (ICS) Eliminates External Bulky Resistors and Improves Efficiency
- Built-in-Control with 128-usteps Indexer
- STEP/DIR Interface
- Integrated DAC and Sequencer for U-Stepping
- Multiple Decay Modes (Slow, Mixed, Adaptive)
- Fixed OFF Time Configurable with External Resistance
- Current-Sense Output (ISENA, ISENB) Current Monitor
- Fault Indicator Pin (FAULT)
- Protections
- Overcurrent Protection for each Individual Channel (OCP)
- Undervoltage Lockout (UVLO)
- Thermal Shutdown TJ = 155°C (TSD)
- Available in TQFN38 5mm x 7mm and TSSOP38 9.7mm x 4.4mm Packages
The MAX22204 is a two-phase stepper motor driver. It integrates two 65V, 3.8AMAX H-Bridges. The H-Bridge FETs have very low impedance, resulting in high driving efficiency and minimal heat. The typical total RON (high- side + low-side) is 0.3Ω. The MAX22204 integrates an accurate current drive regulation circuit and a 128-microstep built-in indexer controlled by a STEP/DIR interface. The high microstep resolution and advanced control technique ensure smooth and quiet operations.
The current flowing into the two low-side FETs is sensed by a non-dissipative Integrated Current Sensing (ICS) and it is then compared with the desired step threshold current. As soon as the bridge current exceeds the threshold (ITRIP), the device enforces the decay for a fixed OFF-time (tOFF).
The non-dissipative ICS eliminates the bulky external power resistors normally required for this function, resulting in a dramatic space and power saving compared with mainstream applications based on the external sense resistor. Currents proportional to the internally-sensed bridge currents are output to pins ISENA and ISENB. By connecting external resistors to these pins, voltages proportional to the bridge currents are generated. These can be used for diagnostic purposes.
The maximum output current per H-Bridge is IMAX = 3.8AMAX limited by the Overcurrent Protection (OCP). The device delivers up to 2ARMS per phase at VM = +24V and TA = 25°C with proper PCB ground plane for thermal dissipation. The current capability depends on the PCB thermal characteristic (PCB ground planes, heatsinks, ventilation, etc.). The maximum full-scale current per H-Bridge is IFS = 2.8A and can be set by an external resistor connected from the REF pin to GND. This current is defined as the maximum current setting of the integrated drive regulation circuit.
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 small TQFN38 5mm x 7mm and TSSOP38 9.7mm x 4.4mm packages.
Documentation
Data Sheet 1
Video 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX22204ATU+ | 38-LFCSP-5X7X0.75 | ||
| MAX22204ATU+T | 38-LFCSP-5X7X0.75 | ||
| MAX22204AUU+ | 38-TSSOP_4.4_EP-4.4_MM | ||
| MAX22204AUU+T | 38-TSSOP_4.4_EP-4.4_MM |
This is the most up-to-date revision of the Data Sheet.
Tools & Simulations
Software Development 1
Evaluation Kits
Evaluation Kit for the MAX22204
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