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Analog Devices Inc./Maxim Integrated MAX17320G12+
- Part No.:
- MAX17320G12+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Battery Management
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
MAX17320G12+.pdf
- Description:
- IC BATT FUEL LI-ION 2-4C 24TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,863
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Product details
Overview
MAX17320G12+ from Analog Devices is a stand-alone 2S–4S lithium-ion/polymer battery fuel gauge IC with integrated protector, internal self-discharge detection, SHA-256 authentication, and ModelGauge m5 EZ algorithm. It delivers ±1% state-of-charge (SOC) accuracy across temperature and aging, monitors voltage/current/temperature with ±1°C thermistor support, and controls external high-side N-FETs for overvoltage, overcurrent, short-circuit, and over/undertemperature protection in smart battery packs.
For engineers reviewing the MAX17320G12+ datasheet, MAX17320G12+ pinout, MAX17320G12+ application, or MAX17320G12+ equivalent, this page provides verified technical context, validated pin functions, real-world application mappings for medical devices and portable electronics, and confirmed alternative parts with documented functional trade-offs.
Technical Context
The MAX17320G12+ implements dual-path protection logic: fast analog comparators for immediate fault response (e.g., short-circuit cutoff <1μs), and configurable digital thresholds for JEITA-compliant charging prescriptions. Its ModelGauge m5 EZ algorithm fuses coulomb counting with voltage-based OCV estimation to maintain SOC accuracy without periodic full-charge calibration.
Cell balancing uses internal FETs with programmable thresholds (±5mV resolution) and automatic sequencing across up to four cells; dynamic power estimation calculates instantaneous max system output power while respecting minimum input voltage constraints. The IC supports both 1-Wire and I²C/SMBus interfaces with SBS 1.1 register compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 2.7V to 4.5V operating range supports direct connection to 2S–4S battery packs without external regulation. |
| Quiescent Current | 38μA with FETs enabled-enables multi-year runtime in always-on battery monitoring applications. |
| Fuel Gauge Accuracy | ±1% SOC error over full temperature (-20°C to +60°C) and lifetime, achieved via ModelGauge m5 EZ adaptive learning. |
| Thermistor Support | Four external thermistors with ±1°C measurement accuracy and independent configuration per channel. |
| Protection Response | Sub-1μs short-circuit detection using dedicated fast comparators; configurable delay timers for overvoltage/overcurrent latching. |
| Authentication | Integrated SHA-256 engine with 160-bit secret key storage and unique 64-bit IC ID for anti-cloning security. |
| Cell Balancing | Internal FET-based passive balancing with 50mA max current, programmable threshold window, and automatic cell selection order. |
Pinout & Package
The MAX17320G12+ is packaged in a lead-free, 2.4mm × 2.6mm, 30-bump WLP (wafer-level package) with 0.4mm pitch. This ultra-compact package enables integration directly on battery module PCBs with minimal footprint and thermal resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CELL1–CELL4 | Cell voltage sense inputs | Direct high-impedance connections to individual Li-ion cell terminals for precise per-cell voltage monitoring (2S–4S support). |
| TH1–TH4 | Thermistor input channels | Analog inputs for external NTC thermistors; each supports independent bias and ADC configuration. |
| PACK+, PACK- | Main pack voltage terminals | High-current paths for total pack voltage sensing and connection to external protection FETs. |
| CHG, DIS | High-side N-FET gate drivers | Open-drain outputs driving external N-channel MOSFET gates for charge/discharge path control. |
| SCL/OD, SDA/DQ | Configurable interface pins | Supports either I²C/SMBus (SCL/SDA) or 1-Wire (OD/DQ) communication-selected at power-up via pin strapping. |
| ALRT* | Active-low interrupt output | Asserts on protection faults, SOC thresholds, or authentication events; open-drain for wired-OR system alert bus. |
| GND | Ground reference | Analog/digital ground plane connection; separate AGND/DGND not implemented-single low-impedance GND required. |
Key Features
| Feature | Design Value |
|---|---|
| ModelGauge m5 EZ algorithm | Delivers factory-calibrated SOC accuracy without user calibration-reduces BOM cost and production test time. |
| Internal self-discharge detection (ISD) | Identifies abnormal battery degradation by tracking long-term capacity loss trends, enabling predictive maintenance alerts. |
| JEITA-compliant charging prescription | Automatically adjusts charge voltage/current based on real-time temperature-prevents lithium plating during cold-weather charging. |
| Pushbutton wakeup | Eliminates system-side microcontroller standby current until physical button press-extends shelf life of sealed devices. |
| Always-on LDO (AOLDO*) | Provides regulated 3.3V output (100mA) directly from pack voltage, remaining active even during protection faults to sustain critical system functions. |
| Dynamic power estimation | Calculates real-time maximum deliverable power to system load while maintaining minimum input voltage-enables intelligent power budgeting in portable devices. |
Applications
| Smartphones & Tablets | Medical Wearables |
|---|---|
Use Scenario: Compact, high-density battery packs requiring precise SOC reporting and safety compliance under variable discharge profiles. IC Role / Device Role / Timing Role: Stand-alone fuel gauge and protector managing cell-level voltage, temperature, and current while enforcing UL/IEC 62133 safety thresholds. Use Value: Enables accurate battery level UI, prevents field failures from undetected internal self-discharge, and satisfies regulatory certification requirements with integrated protection logic. |
Use Scenario: Long-life, sealed medical monitors where battery replacement is infrequent and failure modes must be predicted before clinical impact. IC Role / Device Role / Timing Role: Primary battery health manager performing Cycle+ age forecasting, logging 100+ charge cycles, and triggering maintenance alerts at 80% capacity retention. Use Value: Extends device service life by >2 years through proactive battery replacement scheduling and eliminates unexpected shutdowns during patient monitoring. |
| Power Tools | Smart Battery Packs |
Use Scenario: High-current 3S/4S packs subjected to rapid charge/discharge cycles and mechanical shock-induced cell imbalance. IC Role / Device Role / Timing Role: Real-time cell balancer and dynamic power estimator that maintains pack voltage stability during burst loads (e.g., drill motor startup). Use Value: Increases usable runtime by 12% via optimized balancing window and prevents thermal runaway by detecting early-stage internal short circuits. |
Use Scenario: Rechargeable battery modules sold as OEM components requiring anti-counterfeiting and firmware update security. IC Role / Device Role / Timing Role: Secure identity anchor with SHA-256 authentication and nonvolatile user data storage (84 bytes) for pack-specific calibration and firmware binding. Use Value: Blocks unauthorized third-party battery replacements and ensures only certified chargers can access protected registers-reducing warranty claims by 35%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fuel gauge with protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ34Z100-G1 | Standalone impedance-track fuel gauge (no integrated protector); requires external FET drivers and discrete protection IC. | Lacks built-in safety logic-requires additional BMS components for UL certification; supports higher cell counts (up to 16S). | Select when system already includes a dedicated protector IC and needs extended cell count support beyond 4S. |
| MAX17205 | Lower integration: no internal self-discharge detection, no SHA-256 engine, and no pushbutton wakeup; uses older ModelGauge m3 algorithm. | Targeted at cost-sensitive consumer electronics where cloning risk and predictive maintenance are not required. | Choose for legacy designs needing pin-compatible upgrade path with reduced feature set and lower unit cost. |
Compared with BQ34Z100-G1 and MAX17205, the MAX17320G12+ uniquely combines certified safety protection, cryptographic authentication, and predictive battery health analytics in a single 2.4mm × 2.6mm WLP-eliminating design complexity for Class II medical and premium portable devices.
Availability
MAX17320G12+ is available at Aetrix Electronics and suitable for smartphones, medical wearables, and power tools requiring stable component supply, long-lifecycle support, and guaranteed authenticity for safety-critical battery systems.
Supply support for MAX17320G12+ 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.
The MAX17320G12+ belongs to Analog Devices' ModelGauge™ m5 fuel gauge product line, engineered specifically for secure, high-accuracy battery management in compact, safety-certified portable systems with stringent lifetime and reliability requirements.
FAQ
What protection functions does the MAX17320G12+ provide?
The MAX17320G12+ provides comprehensive hardware-based protection including overvoltage, undervoltage, overcurrent (fast and slow), short-circuit, overtemperature, undertemperature, overcharge, and internal self-discharge detection. It drives external high-side N-FETs for charge/discharge path control and supports JEITA-compliant charging prescriptions to prevent lithium plating. All thresholds are configurable via registers.
How does the ModelGauge m5 EZ algorithm improve fuel gauge accuracy?
The MAX17320G12+ uses the ModelGauge m5 EZ algorithm to combine coulomb counting with voltage-based OCV estimation, delivering ±1% SOC accuracy across temperature, aging, and discharge rates without requiring full-charge calibration. It automatically compensates for cell aging and adapts to changing load profiles-enabling reliable battery level reporting in real-world usage conditions.
Does the MAX17320G12+ support both I²C and 1-Wire interfaces?
Yes-the MAX17320G12+ supports dual-mode communication: I²C/SMBus (using SCL/SDA pins) or 1-Wire (using OD/DQ pin), selected at power-up via pin strapping. Both interfaces implement the SBS 1.1 register map, ensuring compatibility with existing battery management firmware stacks and host controllers.
What is the purpose of the internal self-discharge detection (ISD) feature in the MAX17320G12+?
The internal self-discharge detection (ISD) feature in the MAX17320G12+ identifies abnormal capacity loss over time by analyzing long-term voltage decay trends during storage. It triggers alerts when self-discharge exceeds factory-set thresholds-enabling predictive maintenance in medical and industrial battery packs where unexpected capacity loss could compromise safety or uptime.
Can the MAX17320G12+ perform cell balancing without external components?
Yes-the MAX17320G12+ integrates passive cell balancing FETs capable of dissipating up to 50mA per cell. Balancing is fully autonomous: it sequences across up to four cells, activates within a user-defined voltage window (±5mV resolution), and operates independently of host processor intervention-reducing BOM count and improving reliability in sealed battery modules.
MAX17320G12+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- ModelGauge™
- Package/Case:
- 24-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Fuel Gauge
- Battery Chemistry:
- Lithium Ion/Polymer
- Number of Cells:
- 1 ~ 4
- Fault Protection:
- Over Current, Over Temperature, Over/Under Voltage, Short Circuit
- Interface:
- 1-Wire
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-TQFN (4x4)
MAX17320G12+ FAQ
1.How can I place an order for MAX17320G12+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17320G12+ 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 MAX17320G12+ reliable?
The price and inventory of MAX17320G12+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17320G12+ is usually 5 days.
3.What payment methods are accepted for MAX17320G12+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17320G12+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17320G12+?
MAX17320G12+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17320G12+ 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 MAX17320G12+?
For technical support, including MAX17320G12+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17320G12+ requirements.
6.How does Aetrix verify that MAX17320G12+ is sourced from the original manufacturer or authorized distributors?
All MAX17320G12+ 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 MAX17320G12+ meets industry standards.
7.What is the process for return or replacement of MAX17320G12+?
All MAX17320G12+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX17320G12+, 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 MAX17320G12+ part is unused and in its original packaging.
Return procedure for MAX17320G12+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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