{"id":9570,"date":"2026-07-04T03:50:07","date_gmt":"2026-07-04T03:50:07","guid":{"rendered":"https:\/\/materialparts.com\/ds2775gtr\/"},"modified":"2026-07-04T03:50:07","modified_gmt":"2026-07-04T03:50:07","slug":"ds2775gtr","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/ds2775gtr\/","title":{"rendered":"DS2775G+T&R"},"content":{"rendered":"

\u4ea7\u54c1\u6982\u89c8<\/h2>\n

The DS2775G+T&R from Analog Devices (Maxim Integrated) is a stand-alone 2-cell Li+ fuel gauge IC with integrated protector and optional SHA-1 authentication. It reports remaining battery capacity in mAh and percentage, providing accurate cell monitoring and safety protection for lithium-ion and lithium-polymer battery packs.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n
Cells<\/td>\n2-cell Li+ \/ Li-Poly<\/td>\n<\/tr>\n
\u7535\u6e90\u7535\u538b<\/td>\n4.0V to 9.2V<\/td>\n<\/tr>\n
Interface<\/td>\n1-Wire (DS2775)<\/td>\n<\/tr>\n
Voltage Measurement<\/td>\n4.88 mV resolution, \u00b15V range<\/td>\n<\/tr>\n
Current Measurement<\/td>\n\u00b151.2 mV sense range, 1.5625 uV LSB<\/td>\n<\/tr>\n
Temperature<\/td>\n0.125\u00b0C resolution on-die sensor<\/td>\n<\/tr>\n
Protection<\/td>\nOvervoltage, undervoltage, overcurrent, short circuit<\/td>\n<\/tr>\n
EEPROM<\/td>\n32-byte parameter + 16-byte user<\/td>\n<\/tr>\n
Operating Temp<\/td>\n-20\u00b0C to +70\u00b0C<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\n14-pin TDFN (3 x 5 mm)<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Stand-alone fuel gauge with FuelPack capacity estimation algorithm<\/li>\n
  • Integrated high-side N-FET driver for overvoltage, undervoltage, overcurrent, and short-circuit protection<\/li>\n
  • 1-Wire interface with 64-bit unique ID for battery pack identification<\/li>\n
  • 16-byte user EEPROM for serial number, date code, or cycle count storage<\/li>\n
  • Low-cost sense resistor for current measurement with gain calibration<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • 2-cell Li+ \/ Li-Poly battery pack fuel gauging<\/li>\n
    • Power tool battery packs<\/li>\n
    • Portable medical device battery management<\/li>\n
    • Laptop battery pack monitoring and protection<\/li>\n
    • Industrial handheld terminal battery packs<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The DS2775G+T&R from Analog Devices (Maxim Integrated) is a stand-alone 2-cell Li+ fuel gauge IC with integrated protector and optional SHA-1 authentication. It reports remaining battery capacity in mAh and percentage, providing accurate cell monitoring and safety protection for lithium-ion and lithium-polymer battery packs. Key Specifications Cells 2-cell Li+ \/ Li-Poly Supply Voltage […]<\/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":[813],"chip_brand":[165],"class_list":["post-9570","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-power-management-ics-pmic","tag-ds2775gtr","chip_brand-adi"],"acf":{"brief_explanation":"ADI 2-cell Li+ stand-alone fuel gauge IC with integrated protector, 1-Wire interface, SHA-1 option, 14-TDFN","date_code":"","package_case":"14-TDFN-EP (3 x 5 mm)","in_stock":11380,"datasheet":"https:\/\/www.analog.com\/en\/products\/DS2775.html","price":"$6.50 @ 1ku","product_introduction":"The DS2775G+T&R is an Analog Devices (Maxim) stand-alone fuel gauge IC for 2-cell lithium-ion and lithium-polymer battery packs. It reports remaining capacity in mAh and percentage using Maxim's FuelPack algorithm, which accounts for discharge rate, temperature, and cell aging. The integrated Li+ protector drives external N-FETs for overvoltage, undervoltage, overcurrent, and short-circuit protection. A 1-Wire interface with 64-bit unique ID provides host access to all measurement and capacity data.","working_principle":"The DS2775 operates through three subsystems: (1) Fuel Gauge \u2014 measures cell voltages (VIN1, VIN2) every 440 ms with 4.88 mV resolution, current via sense resistor (\u00b151.2 mV range, 1.5625 uV LSB), and temperature via on-die sensor (0.125\u00b0C resolution). The FuelPack algorithm combines coulomb counting with voltage-based capacity estimation, adjusting for discharge rate, temperature, and learned cell characteristics; (2) Protection \u2014 continuously monitors cell voltages and sense resistor voltage against programmable OV, UV, OC, and SC thresholds, driving CC (charge FET) and DC (discharge FET) gate outputs accordingly; (3) 1-Wire Communication \u2014 host communicates via 1-Wire protocol at up to 16.3 kbps using the DQ pin, with 64-bit unique ROM ID for pack identification.","pin_description":"
      Pin<\/th>Name<\/th>Function<\/th><\/tr>
      1<\/td>VDD<\/td>Battery positive supply<\/td><\/tr>
      2,7<\/td>VIN1, VIN2<\/td>Cell voltage sense inputs<\/td><\/tr>
      3<\/td>SNS<\/td>Current sense resistor input<\/td><\/tr>
      4<\/td>VSS<\/td>Ground<\/td><\/tr>
      5<\/td>CC<\/td>Charge FET gate drive output<\/td><\/tr>
      6<\/td>DC<\/td>Discharge FET gate drive output<\/td><\/tr>
      8<\/td>PLS<\/td>Pack side sense \/ charger detect<\/td><\/tr>
      9<\/td>PIO<\/td>Programmable I\/O<\/td><\/tr>
      10<\/td>DQ<\/td>1-Wire data interface<\/td><\/tr>
      11-14<\/td>NC\/VSS<\/td>No-connect \/ Ground<\/td><\/tr><\/table>","application_scenarios":"
      • 2-cell power tool Li-Ion battery pack with integrated fuel gauge and safety protection<\/li>
      • Laptop battery pack with 1-Wire host communication for capacity reporting<\/li>
      • Portable medical device battery with accurate mAh remaining display<\/li>
      • Industrial handheld terminal battery with EEPROM cycle-count tracking<\/li>
      • UPS backup battery monitoring and protection module<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>Key Difference<\/th><\/tr>
        DS2776G+T&R<\/td>ADI<\/td>SHA-1 authentication added<\/td><\/tr>
        DS2777G+T&R<\/td>ADI<\/td>2-wire I2C interface version<\/td><\/tr>
        DS2778G+T&R<\/td>ADI<\/td>2-wire I2C + SHA-1 authentication<\/td><\/tr>
        BQ40Z50-R2<\/td>TI<\/td>Multi-cell gauge with Impedance Track<\/td><\/tr>
        RAJ240045<\/td>Renesas<\/td>2-cell fuel gauge alternative<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/9570","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/comments?post=9570"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/9570\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=9570"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=9570"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=9570"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=9570"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}