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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说明

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.

MAX17320: Simplified Block Diagram MAX17320: Simplified Block Diagram 放大+

关键特性

  • 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

应用

  • 数码相机、视频和运动摄像机
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  • 医疗设备、健康和健身监测仪
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  • 智能电话、平板电脑、二合一笔记本电脑

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX17320G1EVKIT: Evaluation Kit for the MAX17320
MAX17320G2EVKIT: Evaluation Kit for the MAX17320
MAX17320X1EVKIT: Evaluation Kit for the MAX17320
MAX17320X2EVKIT: Evaluation Kit for the MAX17320
申请可靠性报告: MAX17320 
型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C   Material Composition  

备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

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