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Part Number: MAX1645
Description: The MAX1645 are high-efficiency battery chargers capable of charging batteries of any chemistry type. ...
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MAX1645
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DataSheet
General Description
MAX1645 General Description
The MAX1645 are high-efficiency battery chargers capable of charging batteries of any chemistry type. It uses the Intel System Management Bus (SMBusTM) to control voltage and current charge outputs.
When charging lithium-ion (Li+) batteries, the MAX1645 automatically transition 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 175s charge safety timer prevents "runaway charging" should the MAX1645 stop receiving charging voltage/ current commands.
The MAX1645 employs a next-generation synchronous buck control circuity that lowers the minimum input-tooutput voltage drop by allowing the duty cycle to exceed 99%. The MAX1645 can easily charge one to four series Li+ cells.
MAX1645 Maximum Ratings
DCIN, CVS, CSSP, CSSN, LX to GND..........................-0.3V to +30V
CSSP to CSSN, CSIP to CSIN ..................................-0.3V to +0.3V
PDS, PDL to GND ......................................-0.3V to (VCSSP + 0.3V)
BST to LX....................................................................-0.3V to +6V
DHI to LX.....................................................-0.3V to (VBST + 0.3V)
CSIP, CSIN, BATT to GND ........................................-0.3V to +22V
LDO to GND .......................-0.3V to (lower of 6V or VDCIN + 0.3V)
DLO to GND ..............................................-0.3V to (VDLOV + 0.3V)
REF, DAC, CCV, CCI, CCS, CLS to GND........-0.3V to (VLDO + 0.3V)
VDD, SCL, SDA, INT, DLOV to GND..............................-0.3V to +6V
THM to GND..................................................-0.3V to (VDD + 0.3V)
PGND to GND .........................................................-0.3V to +0.3V
LDO Continuous Current......................................................50mA
Continuous Power Dissipation (TA = +70)
28-Pin QSOP (derate 10.8mW/ above +70).............860mW
Operating Temperature Range ..............................-40 to +85
Storage Temperature...........................................-60 to +150
Lead Temperature (soldering, 10s) ...................................+300
CSSP to CSSN, CSIP to CSIN ..................................-0.3V to +0.3V
PDS, PDL to GND ......................................-0.3V to (VCSSP + 0.3V)
BST to LX....................................................................-0.3V to +6V
DHI to LX.....................................................-0.3V to (VBST + 0.3V)
CSIP, CSIN, BATT to GND ........................................-0.3V to +22V
LDO to GND .......................-0.3V to (lower of 6V or VDCIN + 0.3V)
DLO to GND ..............................................-0.3V to (VDLOV + 0.3V)
REF, DAC, CCV, CCI, CCS, CLS to GND........-0.3V to (VLDO + 0.3V)
VDD, SCL, SDA, INT, DLOV to GND..............................-0.3V to +6V
THM to GND..................................................-0.3V to (VDD + 0.3V)
PGND to GND .........................................................-0.3V to +0.3V
LDO Continuous Current......................................................50mA
Continuous Power Dissipation (TA = +70)
28-Pin QSOP (derate 10.8mW/ above +70).............860mW
Operating Temperature Range ..............................-40 to +85
Storage Temperature...........................................-60 to +150
Lead Temperature (soldering, 10s) ...................................+300
MAX1645 Features
* Input Current Limiting
* 175s 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
* 175s 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
MAX1645 Typical Application
* Notebook Computers
* Point-of-Sale Terminals
* Personal Digital Assistants
* Point-of-Sale Terminals
* Personal Digital Assistants
MAX1645 Connection Diagram
MAX1645
PDF/DataSheet Download
- Datasheet: MAX1645
- File Size: 281439 KB
- Manufacturer: MAXIM [Maxim Integrated Products]
- Click here to Download
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