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MAX8922L
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
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Key Features
Applications/Uses
Simplified Block Diagram
Technical Docs
| Data Sheet | 30V Li+ Linear Battery Charger with GSM Test Mode in 3mm x 2mm TDFN | May 04, 2010 |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
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.
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.
Technical Docs
| Data Sheet | 30V Li+ Linear Battery Charger with GSM Test Mode in 3mm x 2mm TDFN | May 04, 2010 |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
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