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DS2711, DS2712
Loose Cell NiMH Chargers

NiMH Battery Charger Detects and Avoids Charging Alkaline Cells


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Data Sheet
FULL DATA SHEET (PDF, 260kB)
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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.

Awards

DS2711: EDAW-NEC Power-Supply Product Award Winner 2005
  
DS2711 Loose Cell NiMH Linear Charger: EDN Innovation Award, Finalist 2004

Key Features   Applications/Uses
  • Charge 1 or 2 NiMH Cells
  • Detect and Avoid Charging Alkaline Cells
  • Precharge Deeply Depleted Cells
  • Fast Charge NiMH with -DeltaV 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

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

    Key Specifications:   Battery Chargers
    Part Number Cell Chemistry Number of NiMH or NiCd cells Protected VIN (max) (V) Charging VIN (max) (V) Internal FET/Transistor Charge Rate Set by Charge Termination Secondary Charge Termination Charge Regulation Features EV-Kit Package Smallest Available Package (max w/pins) (mm2) RoHS Available Operating Temp. Range (°C) Price**
    DS2711  NiCd
    NiMH
    1
    2
    5.5 5.5 No Resistor -ΔV Max. Temp.
    Max. V
    Timer
    Linear
    Stand Alone
    Thermistor Input
    Timer
    Yes SOIC/16
    TSSOP/16
    33 Yes -20 to +70 $1.80 @ 1k
    DS2712  Switchmode $1.80 @ 1k
    See All Battery Chargers (60)
    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 prices and delivery, please see the price and availability page or contact an authorized distributor.

    Application Notes
  • Application Note 3388: Detecting Primary Cells with the DS2711/12 - DS2711, DS2712
  • Application Note 3607: Charging Batteries from USB - DS2711, DS2712
  • Application Note 3999: Overview of Rechargeable Batteries and Fast Stand-Alone Chargers - DS2711, DS2712
  • Application Note 4215: Estimating Switching Speed for the DS2712 NiMH Battery Charger - DS2712

    Evaluation Kits
    none

    Design Guides
  • BATTERY MANAGEMENT (PDF)
  • POWER MANAGEMENT FOR BATTERY-POWERED EQUIPMENT (PDF)

    Reliability Reports
  • Reliability Report: DS2711.pdf DS2712.pdf

    Software/Models
    none

    Ordering Information
    Notes:

    1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
    2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
    3. Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
    4. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.


    Devices: 1-9 of 9

    DS2711 Free
    Sample
    Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    Temp RoHS/Lead-Free?
    Materials Analysis
    DS2711K  
    SOIC;16 pin;62 mm²
    Dwg: 56-G2008-001C (PDF)
    Use pkgcode/variation: S16+1*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS2711Z+  
    SOIC;16 pin;62 mm²
    Dwg: 56-G2008-001C (PDF)
    Use pkgcode/variation: S16+1*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS2711E+  
    TSSOP;16 pin;33 mm²
    Dwg: 56-G2019-000A (PDF)
    Use pkgcode/variation: U16+1*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS2711E+T&R  
    TSSOP;16 pin;33 mm²
    Dwg: 56-G2019-000A (PDF)
    Use pkgcode/variation: U16+1*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS2712 Free
    Sample
    Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    Temp RoHS/Lead-Free?
    Materials Analysis
    DS2712Z+  
    SOIC;16 pin;62 mm²
    Dwg: 56-G2008-001C (PDF)
    Use pkgcode/variation: S16+1*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS2712Z+T&R  
    SOIC;16 pin;62 mm²
    Dwg: 56-G2008-001C (PDF)
    Use pkgcode/variation: S16+1*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS2712K  
    TSSOP;16 pin;33 mm²
    Dwg: 56-G2019-000A (PDF)
    Use pkgcode/variation: U16+1*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS2712E+  
    TSSOP;16 pin;33 mm²
    Dwg: 56-G2019-000A (PDF)
    Use pkgcode/variation: U16+1*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS2712E+T&R  
    TSSOP;16 pin;33 mm²
    Dwg: 56-G2019-000A (PDF)
    Use pkgcode/variation: U16+1*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

    More Information
  • New Product Press Release 2004-10-23 

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    2005-08-11
    This page last modified: 2008-03-06



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