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Analog Devices Inc./Maxim Integrated MAX22205ATU+T
- Part No.:
- MAX22205ATU+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Motor Drivers, Controllers
- Package:
- 38-WFQFN Exposed Pad
- Datasheet:
-
MAX22205ATU+T.pdf
- Description:
- DUAL H-BRIDGE FOR STEPPER AND BR
- Quantity:
- Payment:
- Shipping:
Inventory:3,623
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Product details
Overview
MAX22205ATU+T from Analog Devices is a 65V, 7.6A single H-bridge motor driver IC designed for brushed DC and half-step stepper motor control. It integrates low-RON FETs (0.15Ω typical total), non-dissipative integrated current sensing (ICS), and programmable current drive regulation (CDR) with 16-level DAC control. It delivers 4ARMS at +24V/25°C with proper PCB thermal design and supports PWM-controlled bidirectional drive via DINA/DINB inputs.
For engineers reviewing the MAX22205ATU+T datasheet, MAX22205ATU+T pinout, MAX22205ATU+T application, or MAX22205ATU+T equivalent, key selection considerations include its 65V operating voltage, integrated ICS eliminating external sense resistors, CDR fault-monitoring CDR pin, and dual-package availability in TQFN38 (5mm × 7mm) and TSSOP38 (9.7mm × 4.4mm).
Technical Context
The MAX22205ATU+T implements a fully integrated single H-bridge with high-side and low-side N-channel MOSFETs driven by an internal charge pump (VCP = VM + 2.7V). Its current regulation uses a non-dissipative ICS architecture comparing real-time bridge current against a DAC-set threshold (ITRIP), triggering fixed tOFF decay (16–24μs, configurable via ROFF resistor) in slow/mixed/fast modes.
Control logic accepts CMOS-level DINA/DINB for direction/PWM, EN for output enable/disable, DECAY1/DECAY2 for decay mode selection, and ISET[3:0] for full-scale current programming. Fault management includes overcurrent protection (7.6A trip), thermal shutdown at 155°C, and UVLO (4.0V threshold), all reported via open-drain FAULT pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | VM = +4.5V to +65V - supports wide-input industrial and automotive battery systems without external regulators. |
| Total RON (HS + LS) | 0.15Ω typical - enables high-efficiency drive with minimal conduction loss and thermal rise at 4ARMS. |
| Max Output Current | 7.6AMAX impulsive - OCP-limited peak current for capacitive load startup or stepper phase surge. |
| Current Sense Accuracy | ±5% at 6A full scale - enables precise closed-loop torque/current control using ISENA/ISENB analog outputs. |
| Fixed OFF-Time Range | 16–24μs (configurable via ROFF resistor) - sets minimum decay duration for stable current regulation across PWM frequencies. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood, industrial actuator, and factory automation environments. |
| Thermal Resistance (θJA) | 28°C/W (TQFN, 4-layer board) - defines required PCB copper area and thermal vias for 4ARMS continuous operation. |
Pinout & Package
The MAX22205ATU+T is available in two RoHS-compliant packages: 38-pin TQFN (5mm × 7mm, exposed pad) and 38-pin TSSOP (9.7mm × 4.4mm). Both packages share identical pin functions and logic mapping per the manufacturer's pin description table.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT1A / OUT2A OUT1B / OUT2B | H-Bridge Output Terminals | Must be externally shorted (OUT1A=OUT2A, OUT1B=OUT2B) to form single full-bridge; connect to motor terminals with low-inductance, wide PCB traces. |
| DINA / DINB | PWM Direction Inputs | CMOS-compatible logic inputs controlling H-bridge state (forward/reverse/brake); not intended for >1kHz switching. |
| EN | Enable Input | Logic-high enables driver; logic-low forces outputs to high-impedance coast mode - used for dynamic braking control. |
| ISENA / ISENB | Current Monitor Outputs | Analog current-source pins (KISEN = 7500 A/A); sink current proportional to respective half-bridge low-side conduction. |
| CDR | Current Regulation Activity Indicator | Open-drain output asserted low each time internal CDR loop activates - enables real-time regulation event logging. |
| FAULT | Fault Status Output | Active-low open-drain signal pulled low during OCP, TSD, or UVLO - requires external pull-up for microcontroller interrupt detection. |
| REF / ROFF | Analog Configuration Inputs | REF sets full-scale current (via RREF to GND); ROFF sets fixed tOFF (via RROFF to GND) - both enable precision analog tuning without digital interface. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Current Sensing (ICS) | Eliminates external power sense resistors - reduces BOM count, PCB area, and power loss while improving measurement accuracy and thermal performance. |
| Programmable Current Drive Regulation (CDR) | 16-level DAC-controlled ITRIP with ±5% accuracy - enables repeatable startup current limiting for brushed DC motors and precise phase current control in stepper applications. |
| Multiple Decay Modes | Configurable slow/mixed/fast decay via DECAY1/DECAY2 - allows optimization of torque ripple, efficiency, and electromagnetic compatibility per motor type and speed. |
| Non-Dissipative Current Monitor Outputs | ISENA/ISENB provide real-time, isolated current feedback with 0.5μs settling time - supports high-bandwidth current-loop control without signal conditioning. |
| Robust Fault Protection Suite | OCP (7.6A), TSD (155°C), UVLO (4.0V) with latched FAULT output - ensures safe operation under overload, overheating, or brownout conditions without external supervision. |
Applications
| Brushed DC Motor Control | Half-Step Stepper Motor Drive |
|---|---|
Use Scenario: Precision speed and torque control in industrial linear actuators requiring rapid start/stop cycles and stall detection. IC Role / Device Role / Timing Role: Single H-bridge driver executing bidirectional PWM control with integrated current regulation and real-time current monitoring. Use Value: Enables accurate torque-based positioning without external current sensors, reducing system cost and improving reliability in harsh environments. |
Use Scenario: Open-loop microstepping in valve positioners where phase current must be tightly regulated to prevent missed steps under variable load. IC Role / Device Role / Timing Role: Half-bridge controller managing one winding pair with programmable ITRIP and decay timing to maintain consistent step torque. Use Value: Delivers stable 6A full-scale phase current with ±5% regulation accuracy, eliminating need for external DACs or op-amp current loops. |
| Solenoid & Latched Valve Actuation | Industrial Pump & Fan Control |
Use Scenario: High-voltage (up to 65V) solenoid drivers in HVAC dampers and fluid control valves requiring inrush current limiting and thermal safety. IC Role / Device Role / Timing Role: High-side/low-side switch with OCP-blanked startup and CDR-monitored hold current regulation. Use Value: Limits peak inrush to 7.6A while sustaining precise hold current via REF-programmed ITRIP - extends solenoid life and prevents coil burnout. |
Use Scenario: Variable-speed 24V DC fans in server racks and industrial enclosures needing efficient thermal management with fault reporting. IC Role / Device Role / Timing Role: Brushed DC motor driver implementing PWM speed control with FAULT pin interfaced to system supervisor MCU. Use Value: Provides 4ARMS continuous drive at 24V with integrated thermal shutdown and undervoltage lockout - eliminates discrete protection components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar H-bridge motor driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TB9051FTG | 40V max supply, 5.5ARMS, integrated SPI interface, no ISEN analog outputs | Lacks non-dissipative current monitor pins; requires external ADC or current-sense amp for closed-loop control | Preferred when digital configuration and diagnostics are prioritized over analog current feedback simplicity |
| DRV8876N | 45V max supply, 6.5AMAX, external sense resistor required, no CDR DAC or REF/ROFF analog tuning | Relies on external shunt resistor for current sensing - adds power loss, board space, and calibration complexity | Selected where cost sensitivity outweighs integration benefits and thermal footprint is less constrained |
Compared with TB9051FTG and DRV8876N, the MAX22205ATU+T uniquely combines 65V operation, integrated ICS, analog CDR tuning via REF/ROFF, and dual ISEN outputs - enabling simpler, more compact, and thermally efficient brushed/stepper drive solutions without external sensing or digital interface overhead.
Availability
MAX22205ATU+T is available at Aetrix Electronics and suitable for industrial motor control, automated valve actuation, and embedded motion systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX22205ATU+T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The MAX22205ATU+T belongs to Analog Devices' high-voltage motor driver product line, engineered specifically for space-constrained, thermally demanding applications requiring integrated current sensing, robust protection, and analog configurability without microcontroller dependency.
FAQ
What is the maximum continuous output current supported by the MAX22205ATU+T?
The MAX22205ATU+T delivers up to 4ARMS continuously at VM = +24V and TA = 25°C when mounted on a four-layer PCB with adequate ground plane area. This rating assumes optimal thermal layout; actual current capability scales inversely with ambient temperature and PCB thermal resistance (θJA = 28°C/W for TQFN package).
How does the MAX22205ATU+T implement current sensing without external resistors?
The MAX22205ATU+T uses non-dissipative Integrated Current Sensing (ICS) that mirrors motor current through internal FET structures. This generates proportional analog currents at ISENA and ISENB pins (KISEN = 7500 A/A), eliminating the need for power-wasting external shunt resistors while maintaining ±5% accuracy at full scale.
Can the MAX22205ATU+T drive a full bipolar stepper motor?
No - the MAX22205ATU+T contains only one H-bridge and is designed for brushed DC motors or half-step (unipolar) stepper configurations. To drive a full bipolar stepper motor, two MAX22205ATU+T devices are required - one per winding - with coordinated control of DINA/DINB and decay modes.
What is the function of the CDR pin on the MAX22205ATU+T?
The CDR pin is an open-drain output that pulses low each time the internal Current Drive Regulation (CDR) loop activates to enforce decay. This provides direct visibility into CDR activity for diagnostic logging, timing analysis, or synchronization with external controllers - without requiring interpretation of FAULT or current-sense signals.
Does the MAX22205ATU+T require external charge-pump capacitors?
Yes - the MAX22205ATU+T requires a 1μF capacitor between VCP and VM, and a 22nF flying capacitor between CP1 and CP2. These components are mandatory for high-side gate drive operation and must be placed as close as possible to the device per the layout guidelines in the datasheet to ensure stable 65V operation.
MAX22205ATU+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 38-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Motor Type - Stepper:
- Bipolar
- Motor Type - AC, DC:
- Brushed DC
- Function:
- Driver - Fully Integrated, Control and Power Stage
- Output Configuration:
- Half Bridge (4)
- Interface:
- On/Off, PWM
- Technology:
- NMOS
- Step Resolution:
- 1, 1/2
- Applications:
- DC Motors, General Purpose, Stepper Motors
- Current - Output:
- 7.6A
- Voltage - Supply:
- 4.5V ~ 65V
- Voltage - Load:
- 4.5V ~ 65V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 38-TQFN (5x7)
MAX22205ATU+T FAQ
1.How can I place an order for MAX22205ATU+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX22205ATU+T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX22205ATU+T reliable?
The price and inventory of MAX22205ATU+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX22205ATU+T is usually 5 days.
3.What payment methods are accepted for MAX22205ATU+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX22205ATU+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX22205ATU+T?
MAX22205ATU+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX22205ATU+T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX22205ATU+T?
For technical support, including MAX22205ATU+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX22205ATU+T requirements.
6.How does Aetrix verify that MAX22205ATU+T is sourced from the original manufacturer or authorized distributors?
All MAX22205ATU+T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX22205ATU+T meets industry standards.
7.What is the process for return or replacement of MAX22205ATU+T?
All MAX22205ATU+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX22205ATU+T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX22205ATU+T part is unused and in its original packaging.
Return procedure for MAX22205ATU+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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