company blog about Maxim MAX17330X22 Stand-Alone Fuel Gauge With Integrated Precision Charger And Protector

Maxim MAX17330X22 Stand-Alone Fuel Gauge With Integrated Precision Charger And Protector

Product Description Of MAX17330X22
MAX17330X22 is a 28μA IQ stand-alone charger, fuel gauge, protector, and battery internal self-discharge detection IC for 1-cell lithium-ion/polymer batteries. When a voltage source is present, the MAX17330X22 regulates charging by modulating the charge N-FET, using AccuCharge™ charger technology. The MAX17330X22 regulates charge voltage, current, and FET temperature. Stand-alone charging is supported by flexible configuration in nonvolatile memory. 

The MAX17330X22 supports the following:
Low-Power Charging
1mA to 500mA directly from universal 5V USB
No USB identification/coordination needed
High-Power Parallel Packs (>1000mA)
Independently charges parallel packs
Prevents cross-charging for parallel batteries
Coordinates external DC-DC with alerts
Minimizes dropout and heat
Protection and Charging Control —pack or host side

The MAX17330X22 ideal diode circuit supports a quick response to system transients and adapter removal with low voltage drop across the CHG FET.

The MAX17330X22 uses the ModelGauge™ m5 EZ 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 accuracy. The MAX17330X22 automatically compensates for cell aging, temperature, and discharge rate while providing accurate state-of-charge (SOC) in milliampere-hours (mAh) or percentage (%) over a wide range of operating conditions.

The MAX17330X22 monitors the voltage, current, temperature, and state of the battery to provide protection against over/undervoltage, overcurrent, short-circuit, over/undertemperature and overcharge conditions, and internal self-discharge protection using external high-side N-FETs to ensure that the lithium-ion/polymer battery operates under safe conditions which prolongs the life of the battery.

Specifications Of MAX17330X22
Product:Fuel Gauges
Battery Type:Lithium-ion, Lithium Polymer
Output Voltage:1.8 V
Operating Supply Voltage:2.16 V to 4.9 V
Maximum Operating Temperature:+ 85 C
Minimum Operating Temperature:- 40 C
Operating Supply Current:52 uA

Functions Of MAX17330X22

1, Charging Management
High-precision charging control: The MAX17330X22 supports charging voltage regulation with 0.2% accuracy (3.6V to 4.8V configurable) and charging current control with 1% accuracy (256 current settings), which is suitable for low-power charging scenarios ranging from 1mA to 500mA, such as USB direct power supply1.
Thermal management and protection: The MAX17330X22 integrates FET temperature limiting and thermal regulation functions support JEITA standard 6-temperature zone control to ensure a safe charging process14.
Flexible charging modes: MAX17330X22 supports pre-charging, stage charging, zero-voltage or 1.8V+ charging options to suit different battery states1.

2, Battery protection and health monitoring
Multiple Protection Mechanisms: Includes over/under voltage, over current, short circuit, over/under temperature protection, and internal self-discharge detection to extend battery life18.
Battery health prediction: MAX17330X22 predicts battery aging through Cycle+™ algorithm and dynamically adjusts charging strategy to optimise battery capacity utilisation1.

3, Power Metering Technology
ModelGauge m5 EZ algorithm: Combines the high short-term accuracy of a coulometer with the long-term stability of a voltmeter to provide accurate State of Charge (SOC) in milliampere-hour (mAh) or percentage (%) form, with ±0.25% measurement accuracy without calibration14.

4, Low Power Consumption and Interface
Low quiescent current: only 28µA in active mode, as low as 21µA in deep sleep, and only 0.5µA1 in transport mode.
Communication Interface: The MAX17330X22 supports an I2C/SMBus interface for easy communication with the host device and integrates SHA-256 security authentication to prevent cloning14.

5, Package and Compatibility
The MAX17330X22 is available in a 1.9mm x 2.5mm 15-ball WLP package for compact device design.

Main Application Scenarios Of MAX17330X22
1, Consumer electronics:
Dual-screen smartphones, tablets, handheld radios, computer accessories, etc.
Ear-worn devices, wearable devices (e.g., smartwatches)

2, Internet of Things and Smart Devices:
Home/building automation devices, sensors, smart cameras.
Medical devices, health and fitness monitors.

3, Battery Management Systems:
Independent charging and protection of parallel battery packs (e.g. AR/VR systems).
Smart batteries and hybrid supercapacitor batteries.

4, USB powered devices:
Support for USB PPS (Programmable Power Supply) and direct charging without USB identification/coordination.

5, Industrial and portable devices:
For portable devices that require high-precision power monitoring and protection.

Functional Diagram Of MAX17330X22

Zero-Volt Charge Recovery Of MAX17330X22