{"id":2953,"date":"2026-05-28T15:08:28","date_gmt":"2026-05-28T15:08:28","guid":{"rendered":"https:\/\/materialparts.com\/bq24045dsqr\/"},"modified":"2026-05-28T15:08:28","modified_gmt":"2026-05-28T15:08:28","slug":"bq24045dsqr","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/bq24045dsqr\/","title":{"rendered":"BQ24045DSQR"},"content":{"rendered":"

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

The BQ24045DSQR from Texas Instruments is a 1A single-input single-cell Li-Ion and Li-Polymer battery charger in a compact WSON-10 (2.0 x 2.0 mm) package. It features 4.35V high-voltage chemistry support, JEITA temperature monitoring, programmable termination, and IEC 62368-1 safety certification. The device operates from a USB port or AC adapter with input overvoltage protection up to 30V.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n
Battery Chemistry<\/td>\nLi-Ion \/ Li-Polymer (4.35V high-voltage)<\/td>\n<\/tr>\n
Charge Current<\/td>\nUp to 1A (programmable via resistor)<\/td>\n<\/tr>\n
Charge Voltage<\/td>\n4.35V with 1% accuracy<\/td>\n<\/tr>\n
\u8f93\u5165\u7535\u538b\u8303\u56f4<\/td>\n3.5V to 28V operating, 30V max rating<\/td>\n<\/tr>\n
OVP Threshold<\/td>\n6.6V<\/td>\n<\/tr>\n
Safety Timer<\/td>\n10 hours fixed<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n0\u00b0C to +125\u00b0C (junction)<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nWSON-10 (DSQ), 2.0 x 2.0 x 0.75 mm<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • 1% charge voltage accuracy for 4.35V high-voltage chemistry<\/li>\n
  • Programmable precharge and termination threshold<\/li>\n
  • JEITA-compatible NTC temperature monitoring<\/li>\n
  • Input overvoltage protection (6.6V threshold)<\/li>\n
  • Input voltage dynamic power management (VIN-DPM)<\/li>\n
  • Thermal regulation at 125\u00b0C, thermal shutdown at 150\u00b0C<\/li>\n
  • Charge status output (CHG pin) and power-good indicator (PG)<\/li>\n
  • IEC 62368-1 CB certified<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • TWS headsets and earbuds<\/li>\n
    • Smartwatches and fitness trackers<\/li>\n
    • Wireless speakers and portable audio<\/li>\n
    • Mobile POS terminals<\/li>\n
    • Portable medical devices<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The BQ24045DSQR from Texas Instruments is a 1A single-input single-cell Li-Ion and Li-Polymer battery charger in a compact WSON-10 (2.0 x 2.0 mm) package. It features 4.35V high-voltage chemistry support, JEITA temperature monitoring, programmable termination, and IEC 62368-1 safety certification. The device operates from a USB port or AC adapter with input overvoltage […]<\/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-2953","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-power-management-ics-pmic","chip_brand-ti"],"acf":{"brief_explanation":"1A Li-Ion charger, 4.35V high-voltage chemistry, WSON-10, JEITA","date_code":"","package_case":"WSON-10 (DSQ), 2.0 x 2.0 x 0.75 mm","in_stock":5657,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/bq24040.pdf","price":"$0.43 @ 1ku","product_introduction":"The BQ24045DSQR from Texas Instruments is a highly integrated linear battery charger designed for single-cell Li-Ion and Li-Polymer batteries with 4.35V high-voltage chemistry support. It integrates a complete charging solution in a tiny 2 x 2 mm WSON-10 package, including power FETs, current sensing, and charge status indication. The device supports USB 100mA\/500mA input current limiting and features programmable fast-charge and termination currents via external resistors. JEITA-compatible NTC monitoring adjusts charging behavior based on battery temperature, while IEC 62368-1 certification provides safety assurance for consumer applications.","working_principle":"The BQ24045DSQR charges the battery in three phases: precharge (conditioning), constant current (fast charge), and constant voltage. In the precharge phase, a reduced current is applied to deeply discharged batteries. When the battery voltage rises above the precharge threshold, the device transitions to the constant-current phase where the fast-charge current is regulated via the ISET resistor. Once the battery reaches 4.35V, the constant-voltage phase begins and the charge current gradually decreases. When the current drops below the programmable termination threshold, charging stops and the CHG pin indicates completion. The TS pin monitors battery temperature through an NTC thermistor, implementing JEITA guidelines that reduce charge current at cold temperatures and limit voltage at hot temperatures. The integrated VIN-DPM feature reduces charge current if the input voltage drops, preventing USB port voltage collapse.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>IN<\/td>Power<\/td>Input supply (USB\/adapter, 3.5-28V)<\/td><\/tr>
      2<\/td>ISET<\/td>Analog<\/td>Fast-charge current set resistor<\/td><\/tr>
      3<\/td>VSS<\/td>Power<\/td>Ground<\/td><\/tr>
      4<\/td>PRE-TERM<\/td>Analog<\/td>Precharge\/termination threshold set resistor<\/td><\/tr>
      5<\/td>PG<\/td>Output<\/td>Power-good open-drain output<\/td><\/tr>
      6<\/td>NC<\/td>-<\/td>No connect<\/td><\/tr>
      7<\/td>ISET2<\/td>Input<\/td>USB 100mA\/500mA current limit select<\/td><\/tr>
      8<\/td>CHG<\/td>Output<\/td>Charge status open-drain output<\/td><\/tr>
      9<\/td>TS<\/td>Input<\/td>Battery NTC thermistor input (JEITA)<\/td><\/tr>
      10<\/td>OUT<\/td>Power<\/td>Battery charge output \/ system connection<\/td><\/tr><\/table>","application_scenarios":"
      • TWS earbuds and headsets requiring compact charger with 4.35V chemistry<\/li>
      • Smartwatches and fitness bands with USB charging<\/li>
      • Wireless speakers and portable audio devices<\/li>
      • Mobile POS terminals and handheld scanners<\/li>
      • Portable medical devices with safety certification requirements<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        TI<\/td>BQ24040DSQR<\/td>WSON-10<\/td>4.20V standard chemistry version<\/td><\/tr>
        TI<\/td>BQ24041DSQR<\/td>WSON-10<\/td>4.20V with auto-start function<\/td><\/tr>
        TI<\/td>BQ25120AYFPR<\/td>DSBGA-9<\/td>Smaller package, ship mode feature<\/td><\/tr>
        Microchip<\/td>MCP73831T-2ACI\/OT<\/td>SOT-23-5<\/td>4.35V, 500mA, simpler charger<\/td><\/tr>
        onsemi<\/td>NCP511SN33T1G<\/td>TSOP-5<\/td>3.3V, 150mA, low IQ<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2953","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=2953"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2953\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=2953"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=2953"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=2953"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=2953"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}