AccuCharge + ModelGauge m5 EZ 1-Cell Charger, Fuel Gauge, and Protector

The MAX17335 is a 35μA 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 IC regulates charging by modulating the charge N-FET, using AccuCharge™charger technology. The IC regulates charge voltage, current, and FET temperature. Stand-alone charging is supported by flexible configuration in nonvolatile memory. The IC supports the following applications:

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

The IC 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 IC 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 IC 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.

APPLICATIONS

* USB PPS and Direct Charging

* Smart Batteries and Hybrid Supercap Batteries

* Dual Screen Smartphones, Tablets

* Hearables, Wearables, Smartwatches

* Medical Devices, Health, Fitness Monitors

* Handheld Radios, Computers, Accessories

* Home/Building Automation, Sensors, Cameras

* Parallel Battery AR/VR Systems/li>

* Non-Volatile Programmable Stand-Alone Charger

* 1% Charge Current, 256 Current Settings

* 0.25% Charge Voltage, 2.42V to 4.8V, Configurable

* Optional Manual Charge Control

* FET Temperature Limit and Heat Regulation

* Prequal, SmartFull, and Step-Charging Options

* JEITA—9 Temperature Regions

* Battery Health + Programmable Safety/Protection

* Overvoltage/Overcharge Current

* Temperature Region Dependent

* Overcharge/Discharge/Short-Circuit Current

* Over/Under Temperature

* Zero-Volt or >1.8V Charging Option

* Undervoltage + SmartEmpty

* Pushbutton Wakeup/Factory Ship Mode (0.5μA)