MAX1645A
Advanced-Chemistry-Independent, Level-2 Battery Chargers with Input Current Limiting
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SMBus™ Controlled, Chemistry Independent Smart Battery Charger with Input Current Limiting and Safety Timer
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Features
- Input Current Limiting
- 175sec Charge Safety Timeout
- 128mA Wake-Up Charge
- Charges Any Chemistry Battery: Li+, NiCd, NiMH, Lead Acid, etc.
- Intel SMBus 2-Wire Serial Interface
- Compliant with Level 2 Smart Battery Charger Spec. Rev. 1.0
- +8V to +28V Input Voltage Range
- Up to 18.4V Battery Voltage
- 11-Bit Battery Voltage Setting
- ±0.8% Output Voltage Accuracy with Internal Reference
- 3A max Battery Charge Current
- 6-Bit Charge Current Setting
- 99.99% max Duty Cycle for Low-Dropout Operation
- Load/Source Switchover Drivers
- >97% Efficiency
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The MAX1645 is a high-efficiency battery charger capable of charging batteries of any chemistry type. It uses the Intel® System Management Bus (SMBus™) to control voltage and current charge outputs.
When charging lithium-ion (Li+) batteries, the MAX1645 automatically transitions from regulating current to regulating voltage. The MAX1645 can also limit line input current so as not to exceed a predetermined current drawn from the DC source. A 175sec charge safety timer prevents "runaway charging" should the MAX1645 stop receiving charging voltage/current commands.
The MAX1645 employs a next-generation synchronous buck control circuitry that lowers the minimum input-to-output voltage drop by allowing the duty cycle to exceed 99%. The MAX1645 can easily charge one to four series Li+ cells.
Applications
- Notebook Computers
- PDAs and Other Handheld Devices
- Point-of-Sale Terminals
Ask a Question
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MAX1645A
Documentation
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Data Sheet
3
MAX1645-MAX1645A: Advanced-Chemistry-Independent, Level-2 Battery Chargers with Input Current Limiting Data Sheet (Rev.2)
Reliability Data
1
32.89K
Documentation
Software & Part Ecosystem
| Parts | Product Life Cycle | Description | ||
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Switching Battery Chargers1 |
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PRODUCTION |
Chemistry-Independent Battery Chargers |
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Evaluation Kits 1
MAX1645BEVKIT
Evaluation Kit/Evaluation System for the MAX1645B
Features and Benefits
- Charges Any Battery Chemistry: Li+, NiCd, NiMH, Lead Acid, etc.
- SMBus-Compatible 2-Wire Serial Interface
- 3A (max) Battery Charge Current
- Up to 18.4V Battery Voltage
- Up to +28V Input Voltage
- Easy-to-Use Software Included
- Proven PC Board Layout
- Fully Assembled and Tested Surface-Mount Board
Product Detail
The MAX1645B evaluation kit (EV kit) is an efficient, multichemistry battery charger. It uses the Intel® System Management Bus (SMBus™) to control the battery regulation voltage, charger current output, and input current- limit set point.
The MAX1645B EV kit can charge one, two, three, or four series Li+ cells with a current up to 3A.
The MAX1645B evaluation system (EV system) consists of a MAX1645B EV kit and the Maxim SMBUSMON board. The MAX1645B EV kit includes Windows® 95/98/2000/XP-compatible software to provide a user-friendly interface.
Applications
- Notebook Computers
- PDAs and Other Handheld Devices
- Point-of-Sale Terminals