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30V Li+ Linear Battery Charger with GSM Test Mode in 3mm x 2mm TDFN

Industry's First 2.3A GSM Test Mode Supporting Li+ Linear Charger with Safe LDO Output

Product Details

Key Features

Simplified Block Diagram

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Sampling:
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Key Features

  • Overvoltage-Protected 30VDC Rated Input (IN)
  • Input Overvoltage-Protected Safe 4.94V LDO Output
  • 2.3A GSM RF Test Mode
  • No External FET, Blocking Diode, or Sense Resistor Required
  • 1-Wire Easy Programmable Fast-Charge and GSM Test Mode (Active-Low EN/SET)
  • Resistor-Programmable Fast-Charge Current (SETI)
  • Resistor-Programmable Top-Off Current Threshold (MIN)
  • Prequalification Charge
  • Power-OK Monitor Output (Active-Low POK)
  • Charging-Status Output (Active-Low CHG)
  • Die Temperature Regulation for Optimized Charge Rate
  • Tiny (3mm x 2mm x 0.8mm) 10-Pin TDFN Package

Applications/Uses

  • Digital Cameras
  • GSM/EDGE/UMTS/CDMA Cell Phones
  • PDAs
  • Portable Media Players and MP3 Players
  • Wireless Appliances

Description

The MAX8922L linear battery charger safely charges a single-cell lithium-ion (Li+) battery. Charging rate is optimized to accommodate the thermal characteristics of a given application. There is no need to reduce the maximum charge current at the worst-case charger power dissipation. Charging is optimized for a single Li+ cell using a control algorithm that includes low-battery precharging, voltage and current-limited fast charging, and top-off charging, while continuously monitoring for input overvoltage and device die-temperature conditions. The fast-charge current and top-off current thresholds are programmable by a simple 1-Wire® serial interface. The charger status and valid input power are indicated by two open-drain outputs (active-low CHG and active-low POK).

The fast-charge current is defaulted to 400mA and programmable through the 1-Wire interface (active-low EN/SET). The MAX8922L also can be programmable to GSM test mode through the 1-Wire interface.

The MAX8922L is available in a tiny (3mm x 2mm x 0.8mm) 10-pin TDFN package.

Simplified Block Diagram

MAX8922L: Typical Operating Circuit MAX8922L: Typical Operating Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.