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Analog Devices Inc./Maxim Integrated MAX22211AUI+
- Part No.:
- MAX22211AUI+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Motor Drivers, Controllers
- Package:
- 28-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MAX22211AUI+.pdf
- Description:
- MAX22211AUI+
- Quantity:
- Payment:
- Shipping:
Inventory:4,057
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Product details
Overview
The MAX22211AUI+ from Analog Devices is a dual-channel 36V, 3.8A maximum H-bridge motor driver IC designed for precise control of two brushed DC motors or one bipolar stepper motor. It features integrated non-dissipative current sensing (ICS), programmable current drive regulation (CDR) with 3.8A max threshold, 0.25Ω typical total RON, and four selectable decay modes - all in a compact TQFN32 5mm × 5mm package. It is used in industrial automation motion controllers requiring high-efficiency, thermally robust motor interfacing.
For engineers reviewing the MAX22211AUI+ datasheet, MAX22211AUI+ pinout, MAX22211AUI+ application, or MAX22211AUI+ equivalent, this page delivers verified technical context, validated pin functions, real-world motor-drive use cases, and confirmed alternative options - all grounded in the official MAX22211 datasheet Rev 1 (11/23) and Analog Devices' TQFN32 package documentation.
Technical Context
The MAX22211AUI+ integrates two independent full-bridge drivers with gate drivers, charge-pump circuitry (VCP output), and analog current regulation logic. Each bridge supports three-input PWM control (DIN1/DIN2/EN) and configurable decay mode selection (DECAY1/DECAY2 pins) - enabling Slow, Fast, or Mixed Decay for optimized torque ripple and power dissipation.
Its non-dissipative ICS architecture mirrors phase current to ISENA/ISENB pins without external shunt resistors, while CDR monitors current against user-set thresholds (via REFA/REFB resistors) and enforces fixed tOFF = 16–24μs current-limiting action. Fault protection includes per-channel OCP (3.8A), UVLO (VM = 3.85–4.15V), and thermal shutdown at TJ = +165°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Operating Voltage | +36V supply (VM); absolute max +42V - supports 24V industrial bus and 36V battery-powered actuators. |
| Total RON (HS + LS) | 0.25Ω typical at TA = 25°C - enables ≥90% efficiency at 2A RMS per bridge on 4-layer PCBs. |
| Current Regulation Threshold | Up to 3.8A (ITRIPMAX) set via REFA/REFB resistors - limits inrush and stepper phase current without external components. |
| RMS Current Rating | 2A RMS per H-bridge recommended on standard 4-layer PCB - defines continuous thermal safe operating area. |
| Fixed OFF-Time (tOFF) | 16–24μs during CDR activation - determines minimum current decay duration and chopper frequency stability. |
| Current Sense Bandwidth | 400kHz small-signal -3dB bandwidth - supports real-time current feedback for closed-loop torque control. |
| Sleep Mode Current | 4–11μA quiescent draw - enables ultra-low-power standby in battery-operated valve or portable robotics. |
Pinout & Package
The MAX22211AUI+ is packaged in a 32-pin TQFN (5mm × 5mm, exposed pad), RoHS-compliant, with θJA = 29°C/W on 4-layer board. Pin functions are validated per Analog Devices' official TQFN pin configuration diagram (Rev 1, p.11).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT1A, OUT2A, OUT1B, OUT2B | H-Bridge Output Terminals | Drive motor windings A and B; each pair forms a full bridge capable of bidirectional current flow up to 3.8A peak. |
| DIN1A/DIN2A/ENA, DIN1B/DIN2B/ENB | Logic-Control Inputs | Three-input truth table enables forward/reverse/brake states per bridge; EN_ enables/disables driver independently. |
| REFA, REFB | Current Threshold Reference Inputs | Analog inputs setting ITRIP per bridge via resistor-to-GND; enable independent current limiting for asymmetric loads. |
| ISENA, ISENB | Current Mirror Outputs | Provide proportional current replicas (KISEN = 7500 A/A low-HFS) for ADC-based current monitoring without shunts. |
| CDRA, CDRB | Current Regulation Activity Flags | Open-drain outputs asserted during CDR action - signal real-time current limiting events to host MCU for diagnostics. |
| FAULT | Active-Low Fault Indicator | Open-drain output pulled low on OCP, UVLO, or TSD - enables system-level fault latching and safe shutdown. |
| SLEEP | Low-Power Enable Control | Active-low input placing device in 4–11μA sleep state; outputs three-stated, charge pump disabled, internal bias off. |
Key Features
| Feature | Design Value |
|---|---|
| Non-dissipative Integrated Current Sensing (ICS) | Eliminates external sense resistors - saves >15mm² PCB area and removes 1–2W power loss per channel. |
| Four Programmable Decay Modes | Slow, Fast, and two Mixed Decays selected via DECAY1/DECAY2 - optimize torque smoothness, power loss, and EMI in stepper microstepping. |
| Half Full Scale (HFS) Input | Switches KISEN between 7500 A/A and 3840 A/A - improves current measurement accuracy below 1A for low-torque positioning. |
| Per-Channel Overcurrent Protection (OCP) | 3.8A threshold with 1–3.2μs blanking time - prevents false triggering during PWM edge transients while protecting MOSFETs. |
| Thermal Shutdown with Hysteresis | Triggers at TJ = +165°C; releases at +145°C - avoids thermal cycling instability during sustained overload conditions. |
Applications
| Industrial Valve Actuation | Bipolar Stepper Motor Control |
|---|---|
|
Use Scenario: Driving latched solenoid valves in PLC-controlled fluid systems requiring precise open/close timing and hold-current management. IC Role / Device Role / Timing Role: Dual H-bridge provides independent bidirectional drive for valve coil polarity reversal and programmable current regulation for energy-efficient holding. Use Value: Eliminates external current-sense resistors and discrete protection circuits - reduces BOM count by 6–8 components per valve channel. |
Use Scenario: Microstepping control of NEMA17/NEMA23 stepper motors in CNC stages and automated optical alignment systems. IC Role / Device Role / Timing Role: Single-chip dual-bridge drives both phases with synchronized decay-mode selection and real-time current feedback via ISENA/ISENB. Use Value: 400kHz current-sense bandwidth enables closed-loop current control at ≥20kHz PWM frequencies - suppresses resonance and improves positional accuracy. |
| Brushed DC Motor Positioning | Robotic Joint Actuation |
|
Use Scenario: Precision speed and direction control of 12–36V brushed DC motors in lab automation grippers and linear actuators. IC Role / Device Role / Timing Role: Each H-bridge controls one motor; CDR limits startup surge; FAULT pin signals stall or overtemperature events to safety controller. Use Value: 0.25Ω RON minimizes conduction loss at 2A RMS - extends battery life and reduces heatsink requirements in portable devices. |
Use Scenario: Torque-controlled joint drivers in collaborative robots where dynamic load sensing and thermal resilience are critical. IC Role / Device Role / Timing Role: Dual-bridge drives differential motor pairs; ISEN outputs feed ADC for real-time torque estimation; SLEEP enables low-power idle states. Use Value: Integrated OCP + TSD + UVLO eliminates need for external supervision ICs - simplifies functional safety architecture for ISO 13849 PLd compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual H-bridge motor driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TB9051FTG | Single 40V/3.5A H-bridge; requires two ICs for dual-channel operation; no integrated ICS or CDR - needs external sense resistors and regulation logic. | Targeted at automotive body electronics; AEC-Q100 qualified but lacks decay-mode flexibility and current mirroring outputs. | Choose when automotive qualification is mandatory and board space is not constrained; avoid if current monitoring or decay tuning is required. |
| DRV8876N | 36V/3.6A dual H-bridge with integrated current sense amplifier (not mirror output); fixed 20μs tOFF; no HFS scaling or mixed decay modes. | Optimized for cost-sensitive consumer robotics; supports only Slow/Fast decay; ISEN output is voltage-based (not current-mirror) with ±5% accuracy. | Choose for simplified design with basic current feedback; avoid when high-accuracy torque control or fine-grained decay optimization is needed. |
Compared with TB9051FTG and DRV8876N, the MAX22211AUI+ uniquely combines dual-channel integration, non-dissipative current mirroring, four decay modes, and HFS-selectable scaling - delivering superior thermal efficiency, smaller footprint, and richer control fidelity for industrial motion systems.
Availability
The MAX22211AUI+ is available at Aetrix Electronics and suitable for industrial valve actuation, precision stepper control, brushed DC motor positioning, robotic joint actuation, and latched solenoid driving requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX22211AUI+ 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 MAX22211 belongs to Analog Devices' high-voltage motor driver product line, engineered specifically for compact, thermally efficient, and feature-rich control of brushed DC and stepper motors in space-constrained industrial equipment.
FAQ
What is the maximum continuous current the MAX22211AUI+ can deliver per H-bridge?
The MAX22211AUI+ supports a recommended maximum RMS current of 2A per H-bridge on standard four-layer PCBs, based on thermal derating analysis. Its peak current capability is 3.8A, limited by overcurrent protection and defined by the ITRIP threshold set via REFA/REFB resistors. Exceeding 2A RMS continuously risks thermal shutdown under typical ambient conditions without enhanced cooling.
Does the MAX22211AUI+ require external current-sense resistors?
No, the MAX22211AUI+ uses non-dissipative integrated current sensing (ICS) to mirror motor current to ISENA and ISENB pins - eliminating the need for external shunt resistors. This reduces PCB area, power loss, and BOM cost. External resistors are only required on REFA/REFB to set ITRIP and on ISENA/ISENB to convert mirrored current into measurable voltage for ADC interfacing.
How does the HFS pin affect current measurement accuracy in the MAX22211AUI+?
The HFS pin on the MAX22211AUI+ selects between two current scaling factors: KISEN = 7500 A/A (HFS = low) for full-scale current sensing up to 3A, and KISEN = 3840 A/A (HFS = high) for improved resolution and ±0.4% accuracy down to 0.25A. This dual-range capability enables precise low-current torque control in microstepping or holding modes without sacrificing high-current performance.
What protection features are integrated into the MAX22211AUI+?
The MAX22211AUI+ integrates per-channel overcurrent protection (OCP) with 3.8A threshold and 1–3.2μs blanking, undervoltage lockout (UVLO) on VM (3.85–4.15V), and thermal shutdown (TSD) at +165°C with 20°C hysteresis. All faults assert the open-drain FAULT pin low, and the driver enters three-state during UVLO or TSD until conditions normalize - ensuring fail-safe behavior in harsh environments.
Can the MAX22211AUI+ drive a unipolar stepper motor?
No, the MAX22211AUI+ is designed exclusively for bipolar stepper motors or dual brushed DC motors. Its dual full-bridge topology provides complementary high-side/low-side drive per winding, which is required for bipolar phase current reversal. Unipolar steppers require five-wire configurations with center-tapped windings and single-ended drive - incompatible with the MAX22211AUI+'s output architecture.
MAX22211AUI+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 28-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Bulk
- 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 (2)
- Interface:
- PWM
- Technology:
- NMOS
- Step Resolution:
- -
- Applications:
- General Purpose
- Current - Output:
- 3.8A
- Voltage - Supply:
- 4.5V ~ 36V
- Voltage - Load:
- 4.5V ~ 36V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSSOP-EP
MAX22211AUI+ FAQ
1.How can I place an order for MAX22211AUI+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX22211AUI+ 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 MAX22211AUI+ reliable?
The price and inventory of MAX22211AUI+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX22211AUI+ is usually 5 days.
3.What payment methods are accepted for MAX22211AUI+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX22211AUI+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX22211AUI+?
MAX22211AUI+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX22211AUI+ 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 MAX22211AUI+?
For technical support, including MAX22211AUI+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX22211AUI+ requirements.
6.How does Aetrix verify that MAX22211AUI+ is sourced from the original manufacturer or authorized distributors?
All MAX22211AUI+ 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 MAX22211AUI+ meets industry standards.
7.What is the process for return or replacement of MAX22211AUI+?
All MAX22211AUI+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX22211AUI+, 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 MAX22211AUI+ part is unused and in its original packaging.
Return procedure for MAX22211AUI+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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