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MAX1667
Chemistry-Independent, Level 2 Smart Battery Charger
1%-Accurate, Chemistry-Independent, Smart Battery Charger Easily Charges 2-4 Series Li+ Cells
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Status
All versions are Not Recommended for New Designs. See Ordering Information for recommended replacements.
Description
The MAX1667 provides the power control necessary to charge batteries of any chemistry. All charging functions are controlled through the Intel® System Management Bus (SMBus™) interface. The SMBus 2-wire serial interface sets the charge voltage and current and provides thermal status information. The MAX1667 functions as a Level 2 charger, compliant with the Duracell®/Intel Smart Battery Charger Specification.
In addition to the feature set required for a Level 2 charger, the MAX1667 generates interrupts to signal the host when power is applied to the charger or when a battery is installed or removed. Additional status bits allow the host to check whether the charger has enough input voltage, and whether the voltage on or current into the battery is being regulated. This allows the host to determine when lithium-ion (Li+) batteries have completed the charge without interrogating the battery.
The MAX1667 is available in a 20-pin SSOP with a 2mm profile height.
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Data Sheet
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Key Features
- Charges Any Battery Chemistry: Li+, NiCd,
NiMH, Lead Acid, etc.
- SMBus 2-Wire Serial Interface
- Compliant with Duracell/Intel Smart Battery Charger Specification Rev. 1.0
- 4A, 3A, or 1A (max) Battery Charge Current
- 5-Bit Control of Charge Current
- Up to 18.4V Battery Voltage
- 11-Bit Control of Voltage
- ±1% Voltage Accuracy
- Up to +28V Input Voltage
- Battery Thermistor Fail-Safe Protection
- Greater than 95% Efficiency
- Synchronous Rectifier
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Applications/Uses
- Charger Base Stations
- Notebook Computers
- PDAs and Other Handheld Devices
- Phones
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Diagram
 Typical Operating Circuit
Notes and Comments
Up to 18.4V battery voltage, synchronous rectifier, 11-bit voltage control, 5-Bit Current Control
More Information
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Information Index
Document Ref.: 19-1488
Rev 1;
2003-06-18
This page last modified: 2007-06-04
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