{"id":8386,"date":"2026-06-28T13:39:38","date_gmt":"2026-06-28T13:39:38","guid":{"rendered":"https:\/\/materialparts.com\/bq24090dgqr\/"},"modified":"2026-06-28T13:39:38","modified_gmt":"2026-06-28T13:39:38","slug":"bq24090dgqr","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/bq24090dgqr\/","title":{"rendered":"BQ24090DGQR"},"content":{"rendered":"

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

The BQ24090DGQR from Texas Instruments is a standalone single-cell Li-Ion battery charger with 1.1 A charge current, power-path management, and USB input detection in a VQFN-10 package. It charges from USB or AC adapter and powers the system simultaneously.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n
\u8f93\u5165\u7535\u538b<\/td>\n4.35 V to 6.45 V<\/td>\n<\/tr>\n
Charge Current<\/td>\nUp to 1.1 A (programmable)<\/td>\n<\/tr>\n
Battery Voltage<\/td>\n4.2 V (Li-Ion float)<\/td>\n<\/tr>\n
Charge Accuracy<\/td>\n1%<\/td>\n<\/tr>\n
Power-Path<\/td>\nYes (dynamic power management)<\/td>\n<\/tr>\n
USB Input<\/td>\n100 mA \/ 500 mA detection<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40\u00b0C to +85\u00b0C<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nVQFN-10 (2.5 x 2.5 mm)<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Integrated power-path management powers system while charging battery<\/li>\n
  • USB 100 mA \/ 500 mA input current limiting<\/li>\n
  • Programmable charge current up to 1.1 A<\/li>\n
  • Thermal regulation reduces charge current at high junction temperatures<\/li>\n
  • Battery temperature monitoring with NTC thermistor<\/li>\n
  • Charge status outputs for LED indication<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Smartphones and tablets<\/li>\n
    • Portable medical devices<\/li>\n
    • Bluetooth headsets and wearables<\/li>\n
    • Portable instruments<\/li>\n
    • USB-powered consumer electronics<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The BQ24090DGQR from Texas Instruments is a standalone single-cell Li-Ion battery charger with 1.1 A charge current, power-path management, and USB input detection in a VQFN-10 package. It charges from USB or AC adapter and powers the system simultaneously. Key Specifications Input Voltage 4.35 V to 6.45 V Charge Current Up to 1.1 […]<\/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":[31,13],"tags":[],"chip_brand":[138],"class_list":["post-8386","post","type-post","status-publish","format-standard","hentry","category-dc-dc-converters","category-integrated-circuits-ics","chip_brand-ti"],"acf":{"brief_explanation":"1.1A Li-Ion charger, power-path, USB detect, programmable Ichg, VQFN-10","date_code":"","package_case":"VQFN-10 (2.50 x 2.50 x 0.80 mm)","in_stock":10955,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/bq24090.pdf","price":"$1.50 @ 1ku","product_introduction":"The BQ24090DGQR from Texas Instruments is a standalone single-cell Li-Ion\/Li-Polymer battery charger with integrated power-path management in a compact 2.5 x 2.5 mm VQFN-10 package. The device accepts input from USB ports or AC adapters (4.35 V to 6.45 V) and provides programmable charge current up to 1.1 A. The power-path management feature allows the system to be powered from the input source while the battery charges simultaneously, with the battery supplementing system current when the input source is insufficient. The device automatically detects USB connection and limits input current to 100 mA or 500 mA accordingly. The 1% charge voltage accuracy ensures safe and complete charging. Thermal regulation reduces the charge current when the junction temperature exceeds 110\u00b0C, preventing thermal shutdown. The NTC thermistor input monitors battery temperature and suspends charging outside the qualified range.","working_principle":"The BQ24090DGQR implements a three-phase Li-Ion charging profile: pre-charge, constant-current (CC), and constant-voltage (CV). When a deeply depleted battery (below 2.5 V) is connected, the pre-charge phase applies a reduced current (10% of programmed current) to safely bring the battery above the pre-charge threshold. The CC phase then applies the full programmed charge current until the battery voltage reaches 4.2 V. The CV phase maintains the battery at 4.2 V while the charge current gradually decreases. When the current drops to 10% of the programmed value (C\/10 termination), charging is complete and the device enters a low-current maintenance state. The power-path management uses an internal switch to connect the input supply directly to the system output (SYS) when available, and a separate switch connects the battery to SYS when the input is absent. Dynamic power management reduces charge current if the system load plus charge current exceeds the input current limit.","pin_description":"
      Pin<\/th>Name<\/th>Function<\/th><\/tr>
      1<\/td>IN<\/td>Input supply (USB or AC adapter, 4.35-6.45 V)<\/td><\/tr>
      2<\/td>NTC<\/td>Negative temperature coefficient thermistor input for battery temp monitoring<\/td><\/tr>
      3<\/td>CHG<\/td>Open-drain charge status output; active low during charging<\/td><\/tr>
      4<\/td>ISET<\/td>Charge current set; connect programming resistor to GND<\/td><\/tr>
      5<\/td>PG<\/td>Open-drain power-good output; active low when input present<\/td><\/tr>
      6<\/td>BAT<\/td>Battery connection and charge voltage sense<\/td><\/tr>
      7<\/td>SYS<\/td>System power output; connected to IN or BAT via internal switches<\/td><\/tr>
      8<\/td>GND<\/td>Ground connection<\/td><\/tr>
      9<\/td>TMR<\/td>Timer programming; connect capacitor to GND for safety timer<\/td><\/tr>
      10<\/td>ILIM<\/td>Input current limit; connect resistor to GND or tie to IN for USB mode<\/td><\/tr><\/table>","application_scenarios":"
      • Smartphone Charging<\/strong>: USB-powered Li-Ion charging with power-path management allowing simultaneous charging and system operation<\/li>
      • Portable Medical Devices<\/strong>: Battery charging and system power from USB with NTC temperature safety monitoring<\/li>
      • Bluetooth Wearables<\/strong>: Compact charging solution for headsets and smartwatches with USB input detection<\/li>
      • Handheld Instruments<\/strong>: Li-Ion battery charger with AC adapter or USB power source and charge status LED indication<\/li>
      • IoT Devices<\/strong>: USB-rechargeable sensor nodes with power-path management for always-on operation<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>Icharge<\/th>Power-Path<\/th>USB<\/th>Package<\/th>Notes<\/th><\/tr>
        BQ24072DSQR<\/td>TI<\/td>1.5 A<\/td>Yes<\/td>Yes<\/td>WCSP-16<\/td>Higher current, smaller package<\/td><\/tr>
        MCP73871-2CCI\/ML<\/td>Microchip<\/td>1 A<\/td>Yes<\/td>Yes<\/td>QFN-20<\/td>Similar, more pins<\/td><\/tr>
        MAX8903ETJ+T<\/td>ADI<\/td>2 A<\/td>Yes<\/td>Yes<\/td>TQFN-28<\/td>Higher current<\/td><\/tr>
        BQ24133RGET<\/td>TI<\/td>2.5 A<\/td>Yes<\/td>Yes<\/td>VQFN-24<\/td>Switching charger, higher I<\/td><\/tr>
        APR8850<\/td>Anpec<\/td>1 A<\/td>Yes<\/td>Yes<\/td>QFN-16<\/td>Cost-effective alternative<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/8386","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=8386"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/8386\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=8386"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=8386"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=8386"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=8386"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}