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MAX1772

Features: *Input Current Limiting* ±0.5% Output Voltage Accuracy Using Internal Reference (0 to +85)* Programmable Battery Charge Current >4A* Analog Inputs Control Charge Current and Charge Voltage* Monitor Outputs for: Current Drawn from AC Input Source Charging Current AC Adapter Present* Up...

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MAX1772: Features: *Input Current Limiting* ±0.5% Output Voltage Accuracy Using Internal Reference (0 to +85)* Programmable Battery Charge Current >4A* Analog Inputs Control Charge Current and Charge Volt...

MAX1772 Data Sheet

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Part Number:
MAX1772
Supply Ability:
5000

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  • 1~5000
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  • Processing time
  • 15 Days
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Upload time: 2024/11/27

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Product Details

Description



Features:

* Input Current Limiting
* ±0.5% Output Voltage Accuracy Using Internal
   Reference (0 to +85)
* Programmable Battery Charge Current >4A
* Analog Inputs Control Charge Current and
   Charge Voltage
* Monitor Outputs for:
     Current Drawn from AC Input Source
     Charging Current
     AC Adapter Present
* Up to 18.2V (max) Battery Voltage
* 8V to 28V Input Voltage
* >95% Efficiency
* 99.99% (max) Duty Cycle for Low-Dropout
   Operation
* Charges Any Battery Chemistry: Li+, NiCd, NiMH,
   Lead Acid, etc.


Application

* Notebook and Subnotebook Computers
* Personal Digital Assistants
* Hand-Held Terminals


Pinout

Connection Diagram


Specifications

DCIN, CSSP, CSSN to GND.....................................-0.3V to +30V
BST to GND............................................................-0.3V to +36V
BST to LX.................................................................-0.3V to +6V
DHI to LX ...................................................-0.3V to (BST + 0.3V)
LX to GND ................................................................-6V to +30V
BATT, CSIP, CSIN to GND.........................................-0.3V to 20V
CSIP to CSIN or CSSP to CSSN or
   PGND to GND ...............................-0.3V to +0.3V
CCI, CCS, CCV, DLO, ICHG, IINP,
   ACIN, REF to GND ................................-0.3V to (VLDO + 0.3V)
DLOV, VCTL, ICTL, REFIN, CELLS,
   CLS, LDO, ACOK to GND ......................................-0.3V to +6V
DLOV to LDO........................................................-0.3V to +0.3V
DLO to PGND...........................................-0.3V to (DLOV + 0.3V)
LDO Short-Circuit Current .................................................50mA
Continuous Power Dissipation (TA = +70)
   28-Pin QSOP (derate 10.8mW/°C above +70)........860mW
Operating Temperature Range
   MAX1772EEI.....................................................-40 to +85
Junction Temperature .......................................................150
Storage Temperature Range ............................-60 to +150
Lead Temperature (soldering, 10s) ................................+300


Description

The MAX1772 is a highly-integrated, multichemistry battery-charger control IC that simplifies the construction of accurate and efficient chargers. The MAX1772 uses analog inputs to control charge current and voltage and can be programmed by the host or hardwired. High efficiency is achieved by a buck topology with synchronous rectification.

Maximum current drawn from the AC adapter is programmable to avoid overloading the AC adapter when supplying the load and the battery charger simultaneously. This enables the user to reduce the cost of the AC adapter. The MAX1772 provides outputs that can be used to monitor the current drawn from the AC adapter, battery-charging current, and the presence of an AC adapter.

The MAX1772 can charge two to four lithium-ion (Li+) series cells, easily providing 4A. When charging, the MAX1772 automatically transitions from regulating current to regulating voltage. It is available in a space-saving 28-pin QSOP package.




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