{"id":10922,"date":"2026-07-21T05:18:14","date_gmt":"2026-07-21T05:18:14","guid":{"rendered":"https:\/\/ic-vendor.com\/bq27621yzfr-g1a\/"},"modified":"2026-07-21T05:18:14","modified_gmt":"2026-07-21T05:18:14","slug":"bq27621yzfr-g1a","status":"publish","type":"post","link":"https:\/\/ic-vendor.com\/es\/bq27621yzfr-g1a\/","title":{"rendered":"BQ27621YZFR-G1A"},"content":{"rendered":"

Productos<\/h2>\n

The BQ27621YZFR-G1A is a system-side single-cell Li-Ion battery fuel gauge manufactured by Texas Instruments, utilizing the Dynamic Voltage Correlation (DVC) algorithm to report remaining capacity, state-of-charge (SOC), voltage, and temperature without requiring an external sense resistor. Packaged in a tiny 9-pin DSBGA (YZF) measuring only 1.62 x 1.58 mm, it communicates via a 400 kHz I2C interface and supports 4.2V, 4.3V, and 4.35V battery chemistries.<\/p>\n

Especificaciones<\/h2>\n\n\n\n\n\n\n\n\n\n
Battery Chemistry<\/td>\nLi-Ion \/ Li-Polymer (Single Cell)<\/td>\n<\/tr>\n
Capacity Range<\/td>\n100 mAh to 32000 mAh<\/td>\n<\/tr>\n
Comunicaci\u00f3n<\/td>\nI2C (400 kHz)<\/td>\n<\/tr>\n
Tensi\u00f3n de alimentaci\u00f3n<\/td>\n1.62V to 4.5V (powered from battery)<\/td>\n<\/tr>\n
Operating Current<\/td>\n27 uA (typical)<\/td>\n<\/tr>\n
Sense Resistor<\/td>\nNot Required (DVC algorithm)<\/td>\n<\/tr>\n
Temperatura de funcionamiento<\/td>\n-40\u00b0C to +85\u00b0C<\/td>\n<\/tr>\n
Paquete<\/td>\nDSBGA-9 (1.62 x 1.58 mm, 0.5mm pitch)<\/td>\n<\/tr>\n<\/table>\n

Caracter\u00edsticas<\/h2>\n
    \n
  • Dynamic Voltage Correlation algorithm eliminates need for sense resistor<\/li>\n
  • Reports SOC, remaining capacity (mAh), battery voltage (mV), and temperature<\/li>\n
  • Smoothing filter for stable SOC display output<\/li>\n
  • Integrated LDO allows direct battery connection for power supply<\/li>\n
  • Configurable SOC interrupt or battery-low digital output warning<\/li>\n<\/ul>\n

    Aplicaciones<\/h2>\n
      \n
    • Smartphones, feature phones, and tablet battery monitoring<\/li>\n
    • Digital still cameras and camcorders<\/li>\n
    • Handheld terminals and portable data collectors<\/li>\n
    • MP3 and multimedia player battery gauges<\/li>\n
    • Embedded or removable single-cell Li-Ion battery packs<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The BQ27621YZFR-G1A is a system-side single-cell Li-Ion battery fuel gauge manufactured by Texas Instruments, utilizing the Dynamic Voltage Correlation (DVC) algorithm to report remaining capacity, state-of-charge (SOC), voltage, and temperature without requiring an external sense resistor. Packaged in a tiny 9-pin DSBGA (YZF) measuring only 1.62 x 1.58 mm, it communicates via a […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,29],"tags":[2247],"chip_brand":[138],"class_list":["post-10922","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-power-management-ics-pmic","tag-bq27621yzfr-g1a","chip_brand-ti"],"acf":{"brief_explanation":"Single-cell Li-Ion fuel gauge, DVC algorithm, no sense resistor, I2C, DSBGA-9","date_code":"","package_case":"DSBGA-9 (YZF) - 1.62 x 1.58 x 0.625 mm, 0.5mm pitch","in_stock":12965,"datasheet":"https:\/\/www.ti.com\/product\/BQ27621-G1","price":"\/tmp\/tmpennd28fo.sh.50 @ 1ku","product_introduction":"The BQ27621YZFR-G1A from Texas Instruments is a system-side fuel gauge for single-cell Li-Ion batteries that uses the proprietary Dynamic Voltage Correlation (DVC) algorithm to estimate state-of-charge without an external current-sense resistor. The device connects directly to PACK+ and PACK- terminals and operates from the battery voltage through an integrated LDO. It reports remaining capacity (mAh), SOC (%), battery voltage (mV), and temperature via a 400 kHz I2C interface. A smoothing filter provides stable SOC readings, and the device automatically adjusts for self-discharge, temperature, and rate changes. The ultra-small DSBGA-9 package is ideal for space-constrained portable applications.","working_principle":"The BQ27621YZFR-G1A employs the Dynamic Voltage Correlation algorithm which correlates the battery open-circuit voltage (OCV) profile with measured terminal voltage during relaxation periods to determine the state-of-charge. Unlike coulomb-counting methods, DVC does not require continuous current measurement or a sense resistor. The device periodically samples battery voltage and temperature through its integrated ADC, and the firmware processes these measurements through the DVC model to compute SOC and remaining capacity. The integrated LDO powers the internal circuitry directly from the battery. The I2C interface allows the host MCU to read all battery parameters and configure device settings stored in internal flash.","pin_description":"\n
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>\n
      A1<\/td>VDD<\/td>Power<\/td>Supply from battery via internal LDO<\/td><\/tr>\n
      A2<\/td>SDA<\/td>I\/O<\/td>I2C serial data (open-drain)<\/td><\/tr>\n
      A3<\/td>SCL<\/td>Input<\/td>I2C serial clock<\/td><\/tr>\n
      B1<\/td>P+<\/td>Analog<\/td>Battery PACK+ voltage sense input<\/td><\/tr>\n
      B2<\/td>BAT<\/td>Power<\/td>Battery direct connection for internal LDO<\/td><\/tr>\n
      B3<\/td>GPO<\/td>Output<\/td>General purpose output: SOC interrupt or low-battery warning<\/td><\/tr>\n
      C1<\/td>P-<\/td>Analog<\/td>Battery PACK- connection (ground reference)<\/td><\/tr>\n
      C2<\/td>TS<\/td>Analog<\/td>Temperature sense input (internal or external NTC)<\/td><\/tr>\n
      C3<\/td>REGIN<\/td>Power<\/td>LDO input bypass capacitor connection<\/td><\/tr>\n<\/table>","application_scenarios":"
        \n
      • Smartphone battery fuel gauging with SOC display and low-battery interrupt<\/li>\n
      • Portable medical device battery monitoring with temperature compensation<\/li>\n
      • Wearable device battery status reporting via I2C to host MCU<\/li>\n
      • Digital camera removable battery pack state-of-charge indication<\/li>\n
      • Industrial handheld terminal battery management without sense resistor<\/li>\n<\/ul>","alternative_models":"\n
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>\n
        TI<\/td>BQ27520-G4<\/td>DSBGA-12<\/td>System-side Impedance Track gauge with LDO<\/td><\/tr>\n
        TI<\/td>BQ27441-G1A<\/td>DSBGA-9<\/td>Similar DVC fuel gauge, different chemistry support<\/td><\/tr>\n
        ADI<\/td>MAX17055<\/td>WLP-15<\/td>ModelGauge m5 EZ, single-cell Li+<\/td><\/tr>\n
        ST<\/td>STC3115<\/td>QFN-12<\/td>Optimizer adaptive gauge, 2.5-4.5V<\/td><\/tr>\n
        onsemi<\/td>LC709203F<\/td>WLCSP-8<\/td>1-cell Li+ gauge, I2C<\/td><\/tr>\n<\/table>"},"_links":{"self":[{"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/posts\/10922","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/comments?post=10922"}],"version-history":[{"count":0,"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/posts\/10922\/revisions"}],"wp:attachment":[{"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/media?parent=10922"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/categories?post=10922"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/tags?post=10922"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/ic-vendor.com\/es\/wp-json\/wp\/v2\/chip_brand?post=10922"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}