{"id":3535,"date":"2026-06-06T10:01:32","date_gmt":"2026-06-06T10:01:32","guid":{"rendered":"https:\/\/materialparts.com\/bq27441drzt-g1b\/"},"modified":"2026-06-06T10:01:32","modified_gmt":"2026-06-06T10:01:32","slug":"bq27441drzt-g1b","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/bq27441drzt-g1b\/","title":{"rendered":"BQ27441DRZT-G1B"},"content":{"rendered":"

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The BQ27441DRZT-G1B from Texas Instruments is a system-side Impedance Track fuel gauge for single-cell Li-Ion batteries. It provides accurate state-of-charge (SOC), remaining capacity (mAh), and battery voltage (mV) reporting via a 400-kHz I2C interface. Packaged in a compact 12-pin VSON (2.5 x 4.0 mm), it requires minimal external components.<\/p>\n

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\u0627\u0644\u0646\u0648\u0639<\/td>\nSystem-Side Fuel Gauge<\/td>\n<\/tr>\n
Battery Chemistry<\/td>\nSingle-cell Li-Ion \/ Li-Poly<\/td>\n<\/tr>\n
Algorithm<\/td>\nImpedance Track<\/td>\n<\/tr>\n
Capacity Range<\/td>\n200 – 8000 mAh<\/td>\n<\/tr>\n
Sense Resistor<\/td>\n10 mOhm external<\/td>\n<\/tr>\n
\u0627\u0644\u0648\u0627\u062c\u0647\u0629<\/td>\nI2C (400 kHz)<\/td>\n<\/tr>\n
\u062c\u0647\u062f \u0627\u0644\u0625\u0645\u062f\u0627\u062f<\/td>\n2.45V – 4.5V (from battery)<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\nVSON-12 (2.5 x 4.0 mm)<\/td>\n<\/tr>\n
Operating Temp<\/td>\n-40 to 85 C<\/td>\n<\/tr>\n<\/table>\n

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    \n
  • Patented Impedance Track algorithm for accurate SOC estimation<\/li>\n
  • Automatic adjustment for battery aging, temperature, and discharge rate<\/li>\n
  • State-of-Health (SOH) estimation<\/li>\n
  • Powered directly from battery with integrated LDO<\/li>\n
  • Configurable SOC interrupt or battery low output<\/li>\n
  • Internal temperature sensor or host-reported temperature<\/li>\n
  • Minimal user configuration required<\/li>\n<\/ul>\n

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      \n
    • Smartphones and tablets<\/li>\n
    • Portable medical devices<\/li>\n
    • Handheld terminals and scanners<\/li>\n
    • Wearable devices<\/li>\n
    • Portable multimedia players<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The BQ27441DRZT-G1B from Texas Instruments is a system-side Impedance Track fuel gauge for single-cell Li-Ion batteries. It provides accurate state-of-charge (SOC), remaining capacity (mAh), and battery voltage (mV) reporting via a 400-kHz I2C interface. Packaged in a compact 12-pin VSON (2.5 x 4.0 mm), it requires minimal external components. Key Specifications Type System-Side […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,29],"tags":[],"chip_brand":[138],"class_list":["post-3535","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-power-management-ics-pmic","chip_brand-ti"],"acf":{"brief_explanation":"Single-cell Li-Ion fuel gauge, Impedance Track, I2C, 10mOhm sense, VSON-12","date_code":"","package_case":"VSON-12 (2.5 x 4.0 x 0.75 mm)","in_stock":14135,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/bq27441-g1.pdf","price":"$1.09 @ 1ku","product_introduction":"The BQ27441DRZT-G1B from Texas Instruments is a system-side Impedance Track fuel gauge for single-cell Li-Ion and Li-Polymer batteries. It provides accurate remaining capacity (mAh), state-of-charge (%), and battery voltage (mV) through a 400-kHz I2C interface. Using TI's patented Impedance Track algorithm, it automatically compensates for battery aging, self-discharge, temperature changes, and discharge rate variations. The device is powered directly from the battery via an integrated LDO and requires only connections to PACK+ and PACK- along with an external 10 mOhm sense resistor.","working_principle":"The BQ27441DRZT-G1B employs TI's Impedance Track algorithm combining coulomb counting with real-time impedance measurement. The device measures battery voltage, current (via 10 mOhm sense resistor), and temperature to track the battery's chemical state. Voltage relaxation profiles during rest periods determine open-circuit voltage (OCV), which maps to SOC through a chemistry-specific lookup table. During discharge, the algorithm models internal impedance to account for voltage depression under load. The integrated 1.8V LDO powers the internal circuitry directly from the battery.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>VDD<\/td>Power<\/td>1.8V LDO output<\/td><\/tr>
      2<\/td>SRN<\/td>Input<\/td>Sense resistor negative<\/td><\/tr>
      3<\/td>SRP<\/td>Input<\/td>Sense resistor positive<\/td><\/tr>
      4<\/td>BAT<\/td>Input<\/td>Battery voltage sense<\/td><\/tr>
      5<\/td>TS<\/td>Input<\/td>External thermistor input<\/td><\/tr>
      6<\/td>GPOUT<\/td>Output<\/td>SOC interrupt \/ BAT_LOW<\/td><\/tr>
      7<\/td>SCL<\/td>Input<\/td>I2C clock<\/td><\/tr>
      8<\/td>SDA<\/td>I\/O<\/td>I2C data<\/td><\/tr>
      9<\/td>REGIN<\/td>Power<\/td>LDO input (connect to BAT)<\/td><\/tr>
      10<\/td>REG25<\/td>Power<\/td>2.5V internal regulator<\/td><\/tr>
      11-12<\/td>VSS<\/td>Ground<\/td>Ground connections<\/td><\/tr><\/table>","application_scenarios":"
      • Smartphone and tablet battery management with precise SOC display<\/li>
      • Portable medical devices requiring accurate battery monitoring<\/li>
      • Handheld terminals and barcode scanners<\/li>
      • Wearable fitness and health monitors<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        TI<\/td>BQ27421DRZT-G1A<\/td>VSON-12<\/td>Different chemistry support<\/td><\/tr>
        TI<\/td>BQ27426DRZT<\/td>VSON-12<\/td>Wider chemistry support<\/td><\/tr>
        Maxim<\/td>MAX17055<\/td>TDFN-14<\/td>ModelGauge m5 EZ fuel gauge<\/td><\/tr>
        Renesas<\/td>RAA215300<\/td>WLCSP-9<\/td>Fuel gauge with 2-wire interface<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/3535","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/comments?post=3535"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/3535\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=3535"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=3535"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=3535"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=3535"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}