MAX1908
Low-Cost Multichemistry Battery Chargers
Low-Cost, Highly Integrated, Multichemistry Battery-Charger Control ICs Simplify the Construction of Accurate and Efficient Chargers
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Key Features
Applications/Uses
| Charging VIN (V) (max) | 28 |
| Max. ICHG (A) | 5 |
| Cell Chemistry | Lead Acid Li-Ion Li-Polymer NiCd NiMH Universal |
| # NiMH/ NiCd Cells | 2 3 4 5 6 7 8 9 10 |
| # Lithium Ion Cells | 2 3 4 |
| Protected VIN (V) (max) | 28 |
| Charger (V) | 0 to 17.6 |
| Oper. Temp. (°C) | -40 to +85 |
| Package/Pins | TQFN/28 |
| Budgetary Price (See Notes) | 4.22 |
Simplified Block Diagram
Technical Docs
| Data Sheet | Low-Cost Multichemistry Battery Chargers | Nov 30, 2009 |
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) | 28 |
| Max. ICHG (A) | 5 |
| Cell Chemistry | Lead Acid Li-Ion Li-Polymer NiCd NiMH Universal |
| # NiMH/ NiCd Cells | 2 3 4 5 6 7 8 9 10 |
| # Lithium Ion Cells | 2 3 4 |
| Protected VIN (V) (max) | 28 |
| Charger (V) | 0 to 17.6 |
| Oper. Temp. (°C) | -40 to +85 |
| Package/Pins | TQFN/28 |
| Budgetary Price (See Notes) | 4.22 |
Key Features
- ±0.5% Output Voltage Accuracy Using Internal Reference (±0.4% for MAX8765A, 2-/3-Cell Only)
- ±4% Accurate Input Current Limiting
- ±5% Accurate Charge Current
- Analog Inputs Control Charge Current and Charge Voltage
- Outputs for Monitoring
- Current Drawn from AC Adapter
- Charging Current
- AC Adapter Presence
- Up to 17.6V Battery-Voltage Set Point
- Maximum 28V Input Voltage
- > 95% Efficiency
- Shutdown Control Input
- Charge Any Battery Chemistry
- Li+, NiCd, NiMH, Lead Acid, etc.
Applications/Uses
- Handheld Terminals
- Notebook and Subnotebook Computers
- Personal Digital Assistants (PDAs)
Description
The MAX1908/MAX8724/MAX8765/MAX8765A feature input current limiting. This feature reduces battery charge current when the input current limit is reached to avoid overloading the AC adapter when supplying the load and the battery charger simultaneously. The MAX1908/MAX8724/MAX8765/MAX8765A provide outputs to monitor current drawn from the AC adapter (DC input source), battery-charging current, and the presence of an AC adapter. The MAX1908's conditioning charge feature provides 300mA to safely charge deeply discharged lithium-ion (Li+) battery packs.
The MAX1908 includes a conditioning charge feature while the MAX8724/MAX8765/MAX8765A do not.
The MAX1908/MAX8724/MAX8765/MAX8765A charge two to four series Li+ cells, providing more than 5A, and are available in a space-saving, 28-pin, thin QFN package (5mm x 5mm). An evaluation kit is available to speed designs.
Technical Docs
| Data Sheet | Low-Cost Multichemistry Battery Chargers | Nov 30, 2009 |
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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