MAX1772

Low-Cost, Multichemistry Battery-Charger Building Block

0.7% Accurate, Input-Current-Limited, Multichemistry Battery Charger Offers Most Complete Solution


Please check latest availability status for a specific part variant.

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.
MAX1772: Pin Configuration MAX1772: Pin Configuration Enlarge+

Key Features

  • Input Current Limiting
  • ±0.5% Output Voltage Accuracy Using Internal Reference (0°C to +85°C)
  • 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.

Applications/Uses

  • Handheld Terminals
  • Notebook and Subnotebook Computers
  • PDAs and Other Handheld Devices
Part NumberLithium Ion CellsProtected VIN
(V)
Charging VIN
(V)
Charge Rate Set byMax. ICHG
(A)
Charge TerminationCharge RegulationOper. Temp.
(°C)
Package/PinsBudgetary
Price
maxmaxSee Notes
MAX1772 
2
3
4
2828
Analog Input
Resistor
4External ControlSwitchmode-40 to +85
QSOP/28
$6.22 @1k
See All Battery Chargers (74)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


MAX1772EVKIT: Evaluation Kit for the MAX1772

CAD Symbols and Footprints

  • MAX1772EEI+
  • MAX1772EEI+T
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

    Quality Management System >
    Environmental Management System >

     
    Status:
    Package:
    Temperature:

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    Belle Isle 2020
    05/29/2020 - 05/31/2020, Detroit, MI
    2020 Detroit Grand Prix - Chevrolet Detroit Grand Prix presented by Lear Fast Facts The Chevrolet Detroit Grand Prix presented by Lear was hosted on Belle Isle, May 29 - 30 2020. The event featured the cars of the NTT IndyCar Series, the IMSA WeatherTech SportsCar Championship and the Trans Am Series presented by Pirelli. The weekend is collectively referred to as the Chevrolet Detroit Grand Prix presented by Lear and it once again featured the Chevrolet Dual in Detroit IndyCar doubleheader.

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