DS2711

Loose-Cell NiMH Chargers

NiMH Battery Charger Detects and Avoids Charging Alkaline Cells


Please check latest availability status for a specific part variant.

Description

The DS2711 and DS2712 are ideal for in-system or stand-alone charging of 1 or 2 AA or AAA NiMH "loose" cells. Temperature, voltage, and charge time are monitored to provide proper fast charging control algorithms for nickel metal hydride (NiMH) batteries. Battery tests are included to detect defective or inappropriate cells such as alkaline primary batteries. The DS2711/DS2712 support series and parallel topologies, with independent monitoring and control of each cell. Charging of NiCd chemistry cells is also supported.

DS2711, DS2712: Block Diagram DS2711, DS2712: Block Diagram Enlarge+

Key Features

  • Charge 1 or 2 NiMH Cells
  • Detect and Avoid Charging Alkaline Cells
  • Precharge Deeply Depleted Cells
  • Fast Charge NiMH with -ΔV Termination Sensitivity of 2mV (typ)
  • Monitor Voltage, Temperature, and Time for Safety and Secondary Termination
  • Regulate Charge Current:
    • Linear Control (DS2711)
    • Switch-Mode Control (DS2712)
  • Drive PMOS or PNP-Type Pass Element or Switch, or an Optocoupler
  • Compatible with Popular Optocouplers and Integrated Primary Side PWM Controllers
  • Small 16-Pin SO or TSSOP Package

Applications/Uses

  • Desktop/Stand-Alone Chargers (AAA/AA)
  • Digital Still Cameras
  • Gaming
  • Music Players
  • Toys

See parametric specs for Battery Chargers (73)


Part NumberProtected VIN
(V)
Charging VIN
(V)
Charge Rate Set byCharge TerminationCharge RegulationOper. Temp.
(°C)
Package/PinsBudgetary
Price
maxmaxSee Notes
DS2711 5.55.5Resistor-ΔVLinear-20 to +70
SOIC (N)/16
TSSOP/16
$2.02 @1k
DS2712 Switchmode
SOIC (N)/16
TSSOP/16

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.

DS2711K: Evaluation Kit for the DS2711 and DS2712
DS2712K: Evaluation Kit for the DS2711 and DS2712
Product Reliability Reports: DS2711.pdf 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

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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