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Battery Management 
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MAX1772
Low-Cost, Multichemistry Battery-Charger Building Block
0.7% Accurate, Input-Current-Limited, Multichemistry Battery Charger Offers Most Complete Solution
MyMaxim SubscriptionsProduct Details
Key Features
Applications/Uses
Parametric specs for Battery Chargers
| Package/Pins | QSOP/28 |
| Budgetary Price (See Notes) | 6.53 |
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Simplified Block Diagram
Technical Docs
| Data Sheet | Low-Cost, Multichemistry Battery-Charger Building Block | Mar 16, 2009 | |
| App Note | Smart Battery-Charging Schemes for Level 2 Chargers are Accurate and Efficient |
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 .
Parameters
Parametric specs for Battery Chargers
| Package/Pins | QSOP/28 |
| Budgetary Price (See Notes) | 6.53 |
Key Features
- Input Current Limiting
- ±0.5% Output Voltage Accuracy Using Internal Reference (0°C to +85°C)
- Programmable Battery Charge Current >4A
- Analog Inputs Control Charge Current and Charge Voltage
- Monitor Outputs for:
- Current Drawn from AC Input Source
- Charging Current
- AC Adapter Present
- Up to 18.2V (max) Battery Voltage
- 8V to 28V Input Voltage
- >95% Efficiency
- 99.99% (max) Duty Cycle for Low-Dropout Operation
- Charges Any Battery Chemistry: Li+, NiCd, NiMH, Lead Acid, etc.
Applications/Uses
- Handheld Terminals
- Notebook and Subnotebook Computers
- PDAs and Other Handheld Devices
Description
The MAX1772 is a highly-integrated, multichemistry battery-charger control IC that simplifies the construction of accurate and efficient chargers. The MAX1772 uses analog inputs to control charge current and voltage and can be programmed by the host or hardwired. High efficiency is achieved by a buck topology with synchronous rectification.
Maximum current drawn from the AC adapter is programmable to avoid overloading the AC adapter when supplying the load and the battery charger simultaneously. This enables the user to reduce the cost of the AC adapter. The MAX1772 provides outputs that can be used to monitor the current drawn from the AC adapter, battery-charging current, and the presence of an AC adapter.
The MAX1772 can charge two to four lithium-ion (Li+) series cells, easily providing 4A. When charging, the MAX1772 automatically transitions from regulating current to regulating voltage. It is available in a space-saving 28-pin QSOP package.
Maximum current drawn from the AC adapter is programmable to avoid overloading the AC adapter when supplying the load and the battery charger simultaneously. This enables the user to reduce the cost of the AC adapter. The MAX1772 provides outputs that can be used to monitor the current drawn from the AC adapter, battery-charging current, and the presence of an AC adapter.
The MAX1772 can charge two to four lithium-ion (Li+) series cells, easily providing 4A. When charging, the MAX1772 automatically transitions from regulating current to regulating voltage. It is available in a space-saving 28-pin QSOP package.
Technical Docs
| Data Sheet | Low-Cost, Multichemistry Battery-Charger Building Block | Mar 16, 2009 | |
| App Note | Smart Battery-Charging Schemes for Level 2 Chargers are Accurate and Efficient |
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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