Maxim Built-in Broadcasts Trade’s First Li+ Gasoline Gauge IC

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The brand new MAX17320 high-accuracy fuel-gauge and safety circuit from Maxim Built-in Merchandise, Inc. extends run-time on multi-cell battery-powered merchandise whereas additionally monitoring in opposition to self-discharge hazards. The MAX17320 is a pack-side gas gauge and protector IC for two to four collection Lithium-ion (Li+) cells (2S-4S) and is a part of a household of ICs outfitted with Maxim Built-in’s patented ModelGauge™ m5 EZ algorithm that delivers 40 % extra correct state-of-charge (SOC) readings than aggressive choices, eliminating the necessity for battery characterization for most typical Li+ cells. This gas gauge additionally presents the business’s lowest quiescent present (IQ), which is 85 % decrease than the closest competitor and options SHA-256 authentication to safeguard techniques from counterfeit batteries.

For hand-held gadgets with 2S-4S Li+ batteries within the computing, web of issues (IoT), energy software, client, healthcare and cell system classes, guaranteeing buyer security is high of thoughts for designers. Broken or faulty batteries could develop an inner cell leakage which might progressively worsen and may end up in harmful outcomes, together with fireplace or explosion. This could endanger shoppers and tarnish model worth for producers. Stringent manufacturing unit screening could forestall leaky cells from getting shipped out of the manufacturing unit. Nevertheless, till now there have been no options for detecting self-discharge that develops throughout regular utilization of the battery. The MAX17320 warns the system and disables a leaky battery earlier than a probably hazardous consequence. That is along with probably the most superior battery safety that uniquely permits tremendous tuning of voltage and present thresholds based mostly on numerous temperature zones. The IC additionally gives a secondary safety scheme that completely disables the battery by aiding a secondary protector or blowing a fuse in extreme fault situations.

As with all cell system, producers purpose to ship merchandise which have longer battery life than the competitors. Gadgets additionally must have correct SOC info to find out the remaining run-time. As a part of a household of ICs with ModelGauge m5 algorithm, the MAX17320 permits designers to allow the longest run-time and keep away from untimely or sudden shutdown, whereas delivering probably the most correct SOC within the business. The MAX17320 can run in an ultra-low-power mode, enabling the system to learn the SOC immediately because it wakes up with out being disconnected from the battery cells throughout cargo or when saved on the shelf. With the bottom IQ within the business at 85 % decrease than the main competitor, the MAX17320 helps longer product shelf life. 

Key Benefits

  • Highest Safety: Ensures secure charging and discharging in 2S-4S Li+ battery purposes by defending in opposition to irregular voltage, present and temperature situations. Inner self-discharge detection gives techniques with an early warning and cuts off probably hazardous batteries. Delivers safety in opposition to cloning with SHA-256 authentication whereas offering distinctive or dynamic key for each battery.
  • Highest Accuracy: ModelGauge m5 algorithm delivers 40 % higher SOC accuracy than aggressive choices.
  • Lowest IQ:Helps lengthy product shelf-life and runtime with working IQ that’s 85 % decrease than the closest competitor.


  • “It is very important guarantee client security for transportable Li+ gadgets,” mentioned Kevin Anderson, observe chief at Omdia. “Offering a number of ranges of battery safety and safeguarding from counterfeit merchandise will assist designers show their security claims for his or her manufacturers.”
  • “Maxim Built-in’s gas gauge ICs are the business’s most secure and most correct,” mentioned Bakul Damle, enterprise administration director, Cellular Energy Enterprise Unit at Maxim Built-in. “The MAX17320 ICs present further security by detecting inner leakage and stopping probably hazardous outcomes, whereas enhancing consumer expertise via the business’s highest accuracy for 2S-4S Li+ battery powered gadgets utilizing Maxim Built-in’s ModelGauge m5 algorithm.”

Availability and Pricing

  • The MAX17320 is offered at Maxim’s web site for $55 (1000-up, FOB USA); additionally out there from licensed distributors
  • TheMAX17320X2EVKIT# analysis equipment is offered for $89

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