DS2714

Quad, Loose-Cell NiMH Charger

Fast-Charges 1 to 4 Loose NiMH Cells and Performs Tests that Detect and Avoid Charging Defective or Other Inappropriate Cells, such as Alkaline Primary Batteries


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Description

The DS2714 is ideal for standalone charging of 1 to 4 AA or AAA NiMH "loose" cells. NiCd cells can also be charged. 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 DS2714 supports a parallel charging topology, with independent monitoring and control of each cell.

DS2714: Block Diagram DS2714: Block Diagram Enlarge+

Key Features

  • Charges 1 to 4 NiMH Cells
  • Detects and Avoids Charging Alkaline Cells
  • Pre-Charges Deeply Depleted Cells
  • Fast Charges NiMH with -V Termination Sensitivity of 2mV (typ)
  • Monitors Voltage, Temperature and Time for Safety and Secondary Termination
  • Works with Regulated Charge Current Source
  • Drives PNP Type Pass Element
  • Compatible with Integrated Primary-Side PWM Controllers
  • 20-pin TSSOP Package

Applications/Uses

  • Desktop/Standalone Chargers (AAA/AA)
  • Digital Still Cameras
  • Games
  • Music Players
  • Toys

Technical Documents

App Note 4427 Demonstrating Green Technology with Apples, Oranges, Lemons, and Limes
App Note 3959 Using an nMOS Transistor with the DS2714

Quality and Environmental Data

Product Reliability Reports: DS2714.pdf 
Lead-Free Package Tin (Sn) Whisker Reports
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 >

 
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