MAX1926
Switch-Mode 1-Cell Li+ Chargers
Smallest, Simplest Switch-Mode Li+ Charger in 4mm x 4mm QFN Package
MyMaxim SubscriptionsProduct Details
Key Features
Applications/Uses
| Charging VIN (V) (max) | 6.1 |
| Max. ICHG (A) | 2 |
| Cell Chemistry | Li-Ion Li-Polymer |
| # Lithium Ion Cells | 1 |
| Protected VIN (V) (max) | 12 |
| Charger (V) | 4.2 |
| Oper. Temp. (°C) | -40 to +85 |
| Package/Pins | TQFN/12 |
| Budgetary Price (See Notes) | 2.04 |
Simplified Block Diagram
Technical Docs
| Data Sheet | Switch-Mode 1-Cell Li+ Chargers | Nov 15, 2002 |
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 .
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 [email protected] with any questions regarding this Sample Site.
Parameters
| Charging VIN (V) (max) | 6.1 |
| Max. ICHG (A) | 2 |
| Cell Chemistry | Li-Ion Li-Polymer |
| # Lithium Ion Cells | 1 |
| Protected VIN (V) (max) | 12 |
| Charger (V) | 4.2 |
| Oper. Temp. (°C) | -40 to +85 |
| Package/Pins | TQFN/12 |
| Budgetary Price (See Notes) | 2.04 |
Key Features
Applications/Uses
- Cradle Chargers
- Digital Still Cameras
- PDAs
- Self-Charging Battery Packs
Description
Additional features include automatic input power detection (active-low ACON output), logic-controlled enable, and temperature monitoring with an external thermistor. The MAX1925 disables charging for inputs greater than 6.1V, while the MAX1926 charges for inputs between 4.25V and 12V.
The MAX1925/MAX1926 feature two precondition levels to restore near-dead cells. The devices source 4mA to a cell that is below 2V while sourcing C/10 to a cell between 2V and 3V. Full charge current is then applied above 3V. A active-low CHG output drives an LED to indicate charging (LED on) and fault conditions (LED blinking).
The MAX1925/MAX1926 are available in a 12-pin 4mm x 4mm thin QFN package and are specified over the extended temperature range (-40°C to +85°C). An evaluation kit is available to speed design.
Technical Docs
| Data Sheet | Switch-Mode 1-Cell Li+ Chargers | Nov 15, 2002 |
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 .
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 [email protected] with any questions regarding this Sample Site.
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