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MAX1666A, MAX1666S, MAX1666V, MAX1666X
Advanced Lithium-Ion Battery-Pack Protector
Safely Increases Battery-Pack Capacity
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Status
All versions are No Longer Available. See Ordering Information for recommended replacements.
Description
The MAX1666 provides complete protection against overvoltage,
undervoltage, overcharge current, overdischarge
current, and cell mismatch for 2-cell to 4-cell lithium-ion
(Li+) battery packs. The voltage of each cell in the battery
pack is checked and compared to the programmable
threshold and to the other cells in the pack.
The MAX1666 protects the battery pack in an overcurrent
condition by disconnecting the pack from the load at a programmable
limit. On-chip power MOSFET drivers control
external P-channel MOSFETs to disconnect the cells from
external terminals when faults occur.
The MAX1666 employs a unique timing scheme that
allows three modes of operation for optimal performance
and battery power conservation. The MAX1666 can operate
in a stand-alone configuration or in conjunction with a
microcontroller. It is available in four versions: the S version
monitors two Li+ cells, the A and V versions monitor
three cells, and the X version monitors four cells. When
the charge path is disabled by the charge control pin, the
MAX1666A reduces current consumption compared to
the MAX1666S/V/X.
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Data Sheet
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Key Features
- Overvoltage Protection
- Programmable Limits from +4.0V to +4.4V
- Accurate to ±0.5%
- Undervoltage Protection
- Programmable Limits from +2.0V to +3.0V
- Accurate to ±2.5%
- Cell Mismatch Protection
- Programmable Limits from 0 to 500mV
- Accurate to ±10%
- Overcharge Current Protection
- Overdischarge Current Protection
- Low 30µA (typ) Operating Supply Current
- Low 1µA (max) Standby Current
- +28V (max) Input Voltage
- Available in Small 16-Pin QSOP (MAX1666S) and 20-Pin QSOP (MAX1666A/V/X) Packages
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Applications/Uses
- 2/3/4-Cell Lithium-Ion Battery Pack
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Diagram
 Typical Operating Circuits
Reliability Reports
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| Request Reliability Report for: |
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Software/Models
Ordering Information
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Part Number
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Free
Sample |
Buy |
Status
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Recommended Replacement |
Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
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Temp |
RoHS/Lead-Free?
Materials Analysis
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| MAX1666AEEP
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N/A |
No Longer Available |
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QSOP;20 pin;54.2 mm²
Outline Drawing:21-0055 (PDF)
Land Pattern: 90-0168 (PDF)
Use pkgcode/variation: E20-1*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| MAX1666AEEP+
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N/A |
No Longer Available |
MAX1589AEZT300+T
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QSOP;20 pin;54.2 mm²
Outline Drawing:21-0055 (PDF)
Land Pattern: 90-0168 (PDF)
Use pkgcode/variation: E20+1*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX1666AEEP+T
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N/A |
No Longer Available |
MAX1589AEZT300+T
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QSOP;
Land Pattern: Not Available
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-40°C to +85°C
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See data sheet
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| MAX1666AEEP-T
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N/A |
No Longer Available |
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QSOP;
Land Pattern: Not Available
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-40°C to +85°C
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See data sheet
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| MAX1666SEEE
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N/A |
No Longer Available |
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QSOP;16 pin;30.9 mm²
Outline Drawing:21-0055 (PDF)
Land Pattern: 90-0167 (PDF)
Use pkgcode/variation: E16-1*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| MAX1666SEEE-T
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N/A |
No Longer Available |
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QSOP;
Land Pattern: Not Available
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-40°C to +85°C
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See data sheet
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| MAX1666VEEP
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N/A |
No Longer Available |
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QSOP;20 pin;54.2 mm²
Outline Drawing:21-0055 (PDF)
Land Pattern: 90-0168 (PDF)
Use pkgcode/variation: E20-1*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| MAX1666VEEP-T
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N/A |
No Longer Available |
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QSOP;
Land Pattern: Not Available
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-40°C to +85°C
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See data sheet
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| MAX1666XEEP
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N/A |
No Longer Available |
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QSOP;20 pin;54.2 mm²
Outline Drawing:21-0055 (PDF)
Land Pattern: 90-0168 (PDF)
Use pkgcode/variation: E20-1*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| MAX1666XEEP-T
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N/A |
No Longer Available |
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QSOP;
Land Pattern: Not Available
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-40°C to +85°C
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See data sheet
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Notes:
- Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
- Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
- Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
- * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
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Notes and Comments
Programmable overvoltage (4.0V to 4.4V) Undervoltage (2.0V to 3.0V) and Cell Mismatch (0 to 500mV) Protections
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More Information
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Information Index
Document Ref.: 19-1465
Rev 3;
2004-12-16
This page last modified: 2007-07-20
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