{"id":6965,"date":"2026-06-22T03:17:06","date_gmt":"2026-06-22T03:17:06","guid":{"rendered":"https:\/\/materialparts.com\/bq51051brhlr\/"},"modified":"2026-06-22T03:17:06","modified_gmt":"2026-06-22T03:17:06","slug":"bq51051brhlr","status":"publish","type":"post","link":"https:\/\/materialparts.com\/es\/bq51051brhlr\/","title":{"rendered":"BQ51051BRHLR"},"content":{"rendered":"

Productos<\/h2>\n

The BQ51051BRHLR from Texas Instruments is a Qi v1.2-compliant wireless power receiver with integrated Li-Ion\/Li-Pol battery charger, 1.5A charging, 93% efficiency, and 20-pin VQFN package.<\/p>\n

Especificaciones<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Tipo<\/td>\nQi-Compliant Wireless Power Receiver and Battery Charger<\/td>\n<\/tr>\n
WPC Standard<\/td>\nQi v1.2 compliant<\/td>\n<\/tr>\n
Battery Charge Voltage<\/td>\n4.35V (4.20V\/4.40V options available)<\/td>\n<\/tr>\n
Charge Current<\/td>\nUp to 1.5A<\/td>\n<\/tr>\n
AC-DC Efficiency<\/td>\n93% (peak)<\/td>\n<\/tr>\n
Input Voltage (RECT)<\/td>\n4V to 10V (recommended); 20V max (absolute)<\/td>\n<\/tr>\n
Synchronous Rectifier RDS(ON)<\/td>\n100 mOhm (typical)<\/td>\n<\/tr>\n
Comunicaci\u00f3n<\/td>\nQi v1.2 inductive (capacitive\/resistive load modulation)<\/td>\n<\/tr>\n
Supply Current<\/td>\n8 mA (typical)<\/td>\n<\/tr>\n
Temperature Monitoring<\/td>\nTS\/CTRL pin with NTC threshold detection<\/td>\n<\/tr>\n
Paquete<\/td>\nVQFN-20 (RHL, 3.5 x 4.5 mm)<\/td>\n<\/tr>\n
Temperatura de funcionamiento<\/td>\n0C to +125C (junction)<\/td>\n<\/tr>\n<\/table>\n

Caracter\u00edsticas<\/h2>\n
    \n
  • Single-stage wireless power receiver + battery charger<\/li>\n
  • Qi v1.2 communication protocol compliant<\/li>\n

4.35V battery charge voltage (4.20V\/4.40V options)<\/td>\n<\/tr>\n
Up to 1.5A charge current<\/li>\n
  • 93% peak AC-DC charging efficiency<\/li>\n
  • Low-impedance synchronous rectifier (100mOhm RDS(ON))<\/li>\n
  • Overvoltage protection (20V max input)<\/li>\n
  • Overcurrent, thermal shutdown, and fault detection<\/li>\n
  • NTC temperature monitoring via TS\/CTRL pin<\/li>\n
  • AD pin for wired adapter override<\/li>\n
  • Dynamic rectifier voltage control for efficiency<\/li>\n<\/ul>\n

    Aplicaciones<\/h2>\n
      \n
    • Smartphone wireless charging<\/li>\n
    • Wireless headset charging<\/li>\n
    • Portable device battery packs<\/li>\n
    • Wearable device charging<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The BQ51051BRHLR from Texas Instruments is a Qi v1.2-compliant wireless power receiver with integrated Li-Ion\/Li-Pol battery charger, 1.5A charging, 93% efficiency, and 20-pin VQFN package. Key Specifications Type Qi-Compliant Wireless Power Receiver and Battery Charger WPC Standard Qi v1.2 compliant Battery Charge Voltage 4.35V (4.20V\/4.40V options available) Charge Current Up to 1.5A AC-DC […]<\/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":[19,13],"tags":[],"chip_brand":[138],"class_list":["post-6965","post","type-post","status-publish","format-standard","hentry","category-analog-linear-ics","category-integrated-circuits-ics","chip_brand-ti"],"acf":{"brief_explanation":"Qi Wireless Pwr Rcvr+Charger, 1.5A, 4.35V, VQFN-20","date_code":"","package_case":"VQFN-20 (3.5 x 4.5 x 0.95 mm, 0.5mm pitch)","in_stock":3071,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/bq51051b.pdf","price":"$2.70 @ 1ku","product_introduction":"The BQ51051BRHLR from Texas Instruments is a single-chip Qi v1.2-compliant wireless power receiver with an integrated Li-Ion\/Li-Pol battery charge controller. The device combines the wireless power receiver (AC-DC rectifier), digital controller for Qi communication, and battery charge controller into a single 3.5x4.5mm VQFN-20 package, minimizing external component count. The synchronous rectifier uses low-RDS(ON) N-MOSFETs (100mOhm typical) to achieve 93% peak AC-DC charging efficiency. The rectified output feeds an LDO that regulates the battery charge voltage and current. The 4.35V charge voltage supports Li-Pol batteries with 4.35V chemistry; 4.20V and 4.40V voltage options are available in the bq51050B and bq51052B variants. The Qi v1.2 communication is implemented through capacitive or resistive load modulation on the COMM1\/COMM2 pins, which vary the reflected impedance seen by the transmitter coil to regulate power transfer and send control data. The dynamic rectifier voltage control adjusts the rectifier output voltage to track the battery voltage, minimizing the voltage drop across the LDO and maximizing efficiency across the full charge cycle. The AD pin allows a wired adapter to override wireless charging, automatically switching to the wired source when detected.","working_principle":"The BQ51051BRHLR operates as a complete wireless power transfer receiver system. The AC signal from the receiver coil (connected to AC1\/AC2) is rectified by the internal synchronous rectifier, which uses N-MOSFETs driven by a zero-current switching controller to minimize losses. The rectified DC voltage at the RECT pin is monitored and regulated by the digital controller through Qi communication with the transmitter. The receiver communicates with the transmitter by modulating the load on the receiver coil (capacitive modulation via COMM1\/COMM2), which creates a reflected impedance change detectable by the transmitter. The Qi v1.2 protocol sends control error packets to increase or decrease the transmitted power, maintaining the RECT voltage within the target range. The LDO stage regulates the rectified voltage down to the battery charge voltage (4.35V). The battery charge controller implements a CC\/CV profile: constant current (up to 1.5A) until the battery reaches 4.35V, then constant voltage until the current tapers to the termination threshold set by the ILIM\/TERM pins. The TS\/CTRL pin monitors an external NTC thermistor on the battery pack and suspends charging if the temperature is outside the safe range. The FOD (Foreign Object Detection) feature monitors the received power and compares it with the measured battery charge power, reducing the transmitted power if excessive loss is detected (indicating a foreign metal object absorbing power). The AD-EN pin enables an external wired adapter path, which overrides the wireless power when detected.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1,20<\/td>PGND<\/td>Power<\/td>Power ground<\/td><\/tr>
      2<\/td>AC1<\/td>Input<\/td>Receiver coil input 1<\/td><\/tr>
      3<\/td>BOOT1<\/td>I\/O<\/td>Bootstrap capacitor for rectifier HS FET 1<\/td><\/tr>
      4<\/td>BAT<\/td>Output<\/td>Battery charge output (4.35V, 1.5A max)<\/td><\/tr>
      5<\/td>CLMP1<\/td>Output<\/td>Overvoltage clamp capacitor 1<\/td><\/tr>
      6<\/td>COMM1<\/td>Output<\/td>Qi communication load modulation 1<\/td><\/tr>
      7<\/td>CHG<\/td>Output<\/td>Charge status output (open-drain)<\/td><\/tr>
      8<\/td>AD-EN<\/td>Output<\/td>Adapter detect enable (active when AD>VBAT)<\/td><\/tr>
      9<\/td>AD<\/td>Input<\/td>Wired adapter input (overrides wireless)<\/td><\/tr>
      10<\/td>TERM<\/td>Input<\/td>Charge termination current set resistor<\/td><\/tr>
      11<\/td>EN2<\/td>Input<\/td>Enable control input<\/td><\/tr>
      12<\/td>ILIM<\/td>Input<\/td>Charge current limit set resistor<\/td><\/tr>
      13<\/td>TS\/CTRL<\/td>Input<\/td>NTC temperature sense \/ control input<\/td><\/tr>
      14<\/td>FOD<\/td>Input<\/td>Foreign Object Detection calibration resistor<\/td><\/tr>
      15<\/td>COMM2<\/td>Output<\/td>Qi communication load modulation 2<\/td><\/tr>
      16<\/td>CLMP2<\/td>Output<\/td>Overvoltage clamp capacitor 2<\/td><\/tr>
      17<\/td>BOOT2<\/td>I\/O<\/td>Bootstrap capacitor for rectifier HS FET 2<\/td><\/tr>
      18<\/td>RECT<\/td>Output<\/td>Rectified DC voltage (4-10V)<\/td><\/tr>
      19<\/td>AC2<\/td>Input<\/td>Receiver coil input 2<\/td><\/tr><\/table>","application_scenarios":"
      • Smartphone wireless charging with 4.35V Li-Pol battery, 1.5A CC\/CV charging via Qi v1.2 protocol and 93% AC-DC efficiency<\/li>
      • Wireless headset charging dock using bq51051B with AD pin for USB-C wired override when plugged in<\/li>
      • Wearable device wireless power with FOD safety and NTC temperature monitoring for safe Li-Ion charging<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        TI<\/td>BQ51050BRHLR<\/td>VQFN-20<\/td>4.20V battery voltage option<\/td><\/tr>
        TI<\/td>BQ51052BRHLR<\/td>VQFN-20<\/td>4.40V battery voltage option<\/td><\/tr>
        TI<\/td>BQ51013ARHLR<\/td>VQFN-28<\/td>Qi v1.1, separate VOUT (no charger)<\/td><\/tr>
        NXP<\/td>NT8034UK<\/td>WLCSP-28<\/td>Qi receiver, similar function<\/td><\/tr>
        IDT<\/td>P9221-R<\/td>QFN-32<\/td>Qi receiver with WPC 1.2<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/6965","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/comments?post=6965"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/6965\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/media?parent=6965"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/categories?post=6965"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/tags?post=6965"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/chip_brand?post=6965"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}