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Loose-Cell NiMH Chargers

NiMH Battery Charger Detects and Avoids Charging Alkaline Cells

Product Details

Key Features

Applications/Uses

Parametric specs for Battery Chargers
Charging VIN (V) (max) 5.5
Cell Chemistry NiCd
NiMH
# NiMH/ NiCd Cells 1
2
Protected VIN (V) (max) 5.5
Oper. Temp. (°C) -20 to +70
Package/Pins SOIC (N)/16
TSSOP/16
Budgetary
Price (See Notes)
2.14
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Simplified Block Diagram

Technical Docs

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Parameters

Parametric specs for Battery Chargers
Charging VIN (V) (max) 5.5
Cell Chemistry NiCd
NiMH
# NiMH/ NiCd Cells 1
2
Protected VIN (V) (max) 5.5
Oper. Temp. (°C) -20 to +70
Package/Pins SOIC (N)/16
TSSOP/16
Budgetary
Price (See Notes)
2.14

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

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.

Simplified Block Diagram

DS2711, DS2712: Block Diagram DS2711, DS2712: Block Diagram Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .