MAX17320
2S-4S ModelGauge m5 EZ Fuel Gauge with Protector, Internal Self-Discharge Detection, and SHA-256 Authentication
Industry's Lowest IQ Stand-Alone Multi-Cell Fuel Gauge with Protector and SHA-256 Authentication
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Overview
Features and Benefits
- Battery Health + Programmable Safety/Protection
- Overvoltage (Temperature Dependent)
- Overcharge/Overdischarge/Short-Circuit Current
- Over/Undertemperature
- Undervoltage + SmartEmpty
- Battery Internal Self-Discharge Detection
- Ideal Diode Discharge During Charge Fault
- Charging Prescriptions (JEITA)
- Prequal Charge Control with CHG FET
- ModelGauge m5 EZ Algorithm
- Percent, Capacity, Time-to-Empty/Full, Age
- Cycle+™ Age Forecast
- Precision Measurement Without Calibration
- Current, Voltage, Power, Time, Cycles
- Die Temperature, 4 Thermistors ±1°C
- Cell Balancing with Internal FETs
- SHA-256 Authentication
- Nonvolatile Memory for Stand-Alone Operation
- History Logging, User Data (84 Bytes)
- Low Quiescent Current
- FETs Enabled: 38µA Active
- Pushbutton Wakeup—Eliminates System Consumption Until Button Press
- Always-On LDO
- Dynamic Power—Estimates Power Capability
- SBS 1.1 Compatible Register Set
Product Details
The MAX17320 is a 38µA IQ stand-alone pack-side fuel gauge IC with protector, battery internal self-discharge detection, and optional SHA-256 authentication for 2 to 4 series lithium-ion/polymer batteries.
The IC monitors the voltage, current, temperature and state of the battery to provide protection against over/undervoltage, overcurrent, short-circuit, over/undertemperature, overcharge, and internal self-discharge conditions using external high-side N-FETs, and provides charging prescription to ensure that the battery operates under safe conditions, thereby prolonging the life of the battery. The IC balances the cells using internal FETs. During prequal charging, the IC uses the CHGFET to linearly control charging.
To prevent battery pack cloning, the IC integrates SHA-256 authentication with a 160-bit secret key. Each IC incorporates a unique 64-bit ID.
The fuel gauge uses Maxim ModelGauge™ m5 algorithm that combines the short-term accuracy and linearity of a coulomb counter with the long-term stability of a voltage-based fuel gauge to provide industry-leading fuel gauge accuracy. The IC automatically compensates for cell aging, temperature, and discharge rate, and provides accurate state-of-charge (SOC) in milliampere-hours (mAh) or percentage (%) over a wide range of operating conditions.
The IC provides a configurable always-on LDO that can power small critical loads on the system side without overloading the cells even under fault conditions. Dynamic power functionality provides the instantaneous maximum battery output power which can be delivered to the system without violating the minimum system input voltage.
A Maxim 1-Wire® or 2-wire I2C/SMBus interface provides access to data and control registers. The IC is available in a lead-free, 2.4mm x 2.6mm 30-bump 0.4mm pitch WLP and 4mm x 4mm 24-pin TQFN packages.
Applications
- Digital Still, Video, and Action Cameras
- Handheld Computers, Radios, and Terminals
- Medical Devices, Health and Fitness Monitors
- Power Tools, Wireless Speakers, and Drones
- Smart Batteries and Battery Backup
- Smartphones, Tablets, and 2-in-1 Laptops
Product Categories
Markets and Technologies
Product Lifecycle
Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (4)
Documentation & Resources
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Don't Let a Low Battery Eat Into Your Playtime2/15/2023 -
Introduction to the MAX17320 2-4 Cell ModelGauge m5 EZ Fuel Gauge with 2-Level Protector and SHA-256 Authentication11/30/2022 -
Better Battery Safety and User Experience with Accurate Fuel Gauges11/29/2022 -
Fast Charging with USB Power Delivery10/25/2022
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Software-Configurable Analog I/O Heralds More Compact and Convenient Calibrators12/1/2021 Analog Dialogue
Tools & Simulations
Software Development
Reference Designs (4)
Design Resources
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.
Support & Discussions
MAX17320 Discussions
Sample & Buy
Ordering FAQs
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Buy Now Pricing
(**) Displayed Buy Now Price and Price Range is based on small quantity orders.
List Pricing
(*)The 1Ku list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
Lead Times
Please see the latest communication from our CCO regarding lead times.
Sampling
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