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4 A switching mode battery charger with power path
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The PM2131 is a fully integrated 4 A switching mode battery charger built upon a dual 2.0 A DC-DC down converter with integrated FET. This dual converter structure allows high efficiency at high current with small size external components. The two paths can remain separated when needed.

The battery CCCV charging mode is either fully autonomous when operating in standalone or software controlled by the host. Multiple charging parameters can be modified or monitored by I²C and through interrupt pin with several default settings. Also, the PM2131 permanently monitors several key parameters for charging algorithm and safety. The PM2131 features the power-path mode which allows the system to run in empty battery conditions and battery aging to be improved when the wall outlet adapter is plugged.

The PM2131 is ideal for tablets and smartphones. It fits perfectly portable/mobile devices and large battery capacity applications with parallel single cell Li-ion battery pack requiring fast charging.

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Errata Sheet
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Key Features

  • 4 A DC/DC step-down battery charger
  • High efficiency up to 92%
  • Operation at 1.6 MHz with a 1 μH coil
  • Dual paths with 2.0 A integrated power field-effect transistor (FET)
  • Constant current constant voltage (CCCV) mode
  • Flexible charge parameter programming with predefined configurations
  • Compliant with multiple battery chemistry (LiCO2, LiFePO4, Ni-rich)
  • Output current regulation
  • High accuracy voltage regulation: <1%
  • Compliant with USB battery charging specification 1.2 and USB standard 2.0
  • External power source detections and charger priority control
  • Battery charger safety and protection
  • 20 V absolute maximum input voltage ratings
  • Up to 16 V operating voltage
  • Input overvoltage and overcurrent protection
  • Safety timer with reset control
  • Reverse polarity and leakage protection
  • Down -2 V input voltage protection
  • Battery and die thermal protections
  • Current sensing and built-in current limiting
  • Battery overvoltage protection and anti-overshoot algorithm
  • Compliant with IEEE 1725-2006, JISC8714 (Japan), CTTL YDT1591 (China) standards
  • Boost mode
  • For USB On-The-Go supply to provide 5 V and 1 A on VBUS when A device
  • Programmable boost voltage: 4.5 V, 5.0 V, 7.0 V and 11.0 V with 5 W max.
  • No external component needed
  • Miscellaneous
  • Power-path mode with external FET and internal current source for empty battery case
  • I²C™ control
  • LED driver for charging indicator
  • Interrupt and wakeup signal
  • Autonomous charging algorithm or software control by system
  • External power source optimization loop

图案 资源


Technical Documentation

Product Specifications

描述 版本 大小
DS9646: 4 A switching mode battery charger with power path
5.0 1,873 KB

User Manual

描述 版本 大小
UM1768: The PM2131 evaluation board
1.0 2,349 KB

Presentations & Training Material


描述 版本 大小
Power management for handheld and portable applications
734 KB

样品 & 购买

产品型号 Marketing StatusPackagePacking TypeAutomotive GradeOrder From STUnit Price (US$)*
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
PM2131AHTActiveWLCSP MSL1Tape And Reel_-No availability reported, please contact our Sales officeN/A-
PM2131ASTActiveWLCSP MSL1Tape And Reel_-No availability reported, please contact our Sales officeN/A-
PM2131UHTActiveWLCSP MSL1Tape And Reel_-No availability reported, please contact our Sales officeN/A-

(*) 建议零售价格仅用于预算,以美元为单位,每。的报价,以当地货币计算的价格,请联系您当地的 ST 销售办事处 或我们的 分销商
(**) 材料声明表格上提供st.com可以是一般的文件,根据最常用的包,包内的家庭。出于这个原因,他们可能不是100%准确,对于一个特定的设备。请联系我们 销售支持 在特定设备上的信息。
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