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Maxim > Products > [Power and Battery Management] 
DS2715
NiMH Battery Pack Charge Controller

1- to 10-cell NiMH battery-pack charge controller. Regulates current through either linear control or switch-mode control.


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 356kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

Description
The DS2715 is well suited for cost-sensitive charger applications where the battery pack is either internal or external to the application. It has been optimized for safe and reliable charging of 1 to 10 NiMH cells in series. The internal gain block can be selected as either a comparator or transconductance amplifier for charge current regulation. This makes the DS2715 configurable as a switched DC charger, a linear current regulator, or a switch-mode current source. The DS2715 pre-conditions severely depleted cells before entering full charge mode. It terminates full charge using the dT/dt technique, which requires an external sensing thermistor. Over-temperature, under-temperature, and over-voltage detection prevents charging under unsafe conditions. A user selectable charge timer allows charge rates from 0.167°C to 2°C. FAST-CHARGE, TOPOFF and DONE modes are included for highly reliable, safe charging of NiMH cells. Discharge mode allows the DS2715 to enter a low power sleep state while the cell pack is being discharged.

An evaluation kit is available:  DS2715KLINEAR, DS2715KSWITCH  

Key Features   Applications/Uses
  • Charges 1 to 10 NiMH Cells
  • FAST-CHARGE up to a 2°C Rate
  • PRECHARGE and TOPOFF Charge Modes Help Cell Conditioning
  • Load Detection Allows the DS2715 to Enter Low Power Sleep Mode (Less than 10µA) while the Cell Pack is Discharged
  • dT/dt Charge Termination Eliminates Cell Charge Stress
  • Monitors Voltage, Temperature, and Time for Safety and Secondary Termination
  • Regulates Current through Either Linear Control or Switch-Mode Control
  • LED Output Displays Charge State
  • Small 16-Pin SO Package

 
  		• Handheld Gaming
  		• Handheld POS Terminals
  		• Portable DVD Players
  		• Portable Television Sets
  		• Test Equipment

    Key Specifications:  Battery Chargers
    Part Number Cell Chemistry NiMH/ NiCd Cells Protected VIN
    (V)    		 Charging VIN
    (V)    		 Charge Rate Set by Charge Termination Charge Regulation Features EV Kit Package/Pins Smallest Available Pckg.
    (mm2)    		 Oper. Temp.
    (°C)    		 Price
    max max max w/pins See Notes
    DS2715  NiMH
    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    		 16.5 16.5 Resistor dT/dt
    Linear
    Switchmode
    Stand Alone
    Thermistor Input
    Timer
    		 Yes
    SOIC(N)/16
    		 62 -20 to +85 $1.80 @1k
    See All Battery Chargers (62)

    Diagram
    DS2715: Operational Diagram
    Operational Diagram

    Application Notes
  		• Application Note 3607: Charging Batteries from USB - DS2715
  		• Application Note 4180: Optimizing the Load-Switch Function of the DS2715 Battery-Charger IC - DS2715
  		• Application Note 4214: Estimating Switching Speed for the DS2715 NiMH Battery Charger - DS2715

    Evaluation Kits
  		• DS2715KLINEAR, DS2715KSWITCH

    Design Guides
  		• Power Management for Battery-Powered Equipment (PDF)

    Reliability Reports
  		• Reliability Report: DS2715.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: 1-4 of 4

    DS2715 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    DS2715BZ+  
    		Active SOIC(N);16 pin;62 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0097 (PDF)
    Use pkgcode/variation: S16+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS2715BZ+T&R    
    		Active SOIC(N);16 pin;62 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0097 (PDF)
    Use pkgcode/variation: S16+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS2715Z+  
    		Active SOIC(N);16 pin;62 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0097 (PDF)
    Use pkgcode/variation: S16+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS2715Z+T&R    
    		Active SOIC(N);16 pin;62 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0097 (PDF)
    Use pkgcode/variation: S16+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

    More Information
  		• New Product Press Release 2005-05-27 

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    •  QuickView   Technical Documents   Ordering Info   More Information  
     Description 
     Key Features 
     Applications/Uses 
     Key Specifications 
     Diagram 

    		 Data Sheet 
     Application Notes 
     Design Guides 
     Engineering Journals 
     Reliability Reports 
     Software/Models 
     Evaluation Kits 

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    2009-04-29
    This page last modified: 2009-04-29


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