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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

产品详情

主要特征

应用/用途

Parametric specs for Battery ID and Authentication
Functions Battery ID
Fuel Gauge
SHA-256 Authentication
Interface 1-Wire
2-Wire
User Data Storage (bits) 672 NVM
VSUPPLY (V) 4.2 to 18
Package/Pins TQFN-CU/24
WLP/30
Oper. Temp. (°C) -40 to +85
Budgetary
Price (See Notes)
1.55
Parametric specs for Battery Fuel Gauges, Protectors, and Monitors
Functions Fuel Gauge
Protector
Battery Type 2-4 Cell Li-Ion
Fuel Gauge Algorithm ModelGauge m5
Interface 1-Wire
2-Wire
User Data Storage (Bytes) 84 NVM
Parameters Measured Current
State of Charge
Temperature
Time
Voltage
Applications Pack
Battery Protection Features 2-Level
Charger-Communication Timeout
Internal Self-Discharge
Over Voltage
Over-Charge
Over-Current
Over-Temperature
Over/Under Voltage
VSUPPLY (V) (min) 4.2
VSUPPLY (V) (max) 18
Package/Pins TQFN-CU/24
WLP/30
Oper. Temp. (°C) -40 to +85
Budgetary
Price (See Notes)
1.55
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参量

Parametric specs for Battery ID and Authentication
Functions Battery ID
Fuel Gauge
SHA-256 Authentication
Interface 1-Wire
2-Wire
User Data Storage (bits) 672 NVM
VSUPPLY (V) 4.2 to 18
Package/Pins TQFN-CU/24
WLP/30
Oper. Temp. (°C) -40 to +85
Budgetary
Price (See Notes)
1.55
Parametric specs for Battery Fuel Gauges, Protectors, and Monitors
Functions Fuel Gauge
Protector
Battery Type 2-4 Cell Li-Ion
Fuel Gauge Algorithm ModelGauge m5
Interface 1-Wire
2-Wire
User Data Storage (Bytes) 84 NVM
Parameters Measured Current
State of Charge
Temperature
Time
Voltage
Applications Pack
Battery Protection Features 2-Level
Charger-Communication Timeout
Internal Self-Discharge
Over Voltage
Over-Charge
Over-Current
Over-Temperature
Over/Under Voltage
VSUPPLY (V) (min) 4.2
VSUPPLY (V) (max) 18
Package/Pins TQFN-CU/24
WLP/30
Oper. Temp. (°C) -40 to +85
Budgetary
Price (See Notes)
1.55

主要特征

  • 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/用途

  • 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

描述

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.

简化框图

MAX17320: Simplified Block Diagram MAX17320: Simplified Block Diagram Zoom icon

技术文档

支持和培训

在Maxim的知识库中搜索技术问题的答案

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Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心