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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 Batter...

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SeekIC No. : 004409139 Detail

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 w...

MAX1645 Data Sheet

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Part Number:
MAX1645
Supply Ability:
5000

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  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/11/27

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Product Details

Description



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


Application

* Notebook Computers
* Point-of-Sale Terminals
* Personal Digital Assistants


Pinout

Connection Diagram


Specifications

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


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.




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