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Single-Cell NiMH Charger

Charges NiMH from a USB Port Without Fear of Overcharging an Alkaline Cell

Product Details

The DS2710 is ideal for in-system charging of single-cell nickel metal hydride (NiMH) cells for low-current portable applications. Inputs to the DS2710 include USB voltage sources and 5V regulated adapters. Temperature, voltage, and charge time are monitored to provide proper fast-charging control algorithms for single-cell NiMH or nickel cadmium (NiCd) batteries. The DS2710 includes battery tests to detect defective or inappropriate cells such as alkaline primary batteries.

Key Features

  • Charges Single-Cell NiMH Cells
  • Switch-Mode Topologies Supported by Hysteretic Control Technique
  • Precharges Deeply Depleted Cells
  • Fast-Charges NiMH with -ΔV Termination Sensitivity of 2mV (typ)
  • Monitors Voltage, Temperature, and Time for Safety and Secondary Termination
  • Regulates Charge Current
  • Designed for External pMOS
  • Rail-to-Rail MOSFET Driver
  • Tiny 10-Pin TDFN Package (3mm x 4mm)

Applications/Uses

  • Battery-Powered Toys
  • Cordless Mouse
  • Small Rechargeable Devices
  • Voice Recorders
Parametric specs for Battery Chargers
Charging VIN (V) (max) 5.5
Max. ICHG (A) 4
Cell Chemistry NiCd
NiMH
# NiMH/ NiCd Cells 1
Protected VIN (V) (max) 5.5
Charger (V) 1.65
Oper. Temp. (°C) -20 to +70
Package/Pins TDFN/10
Budgetary
Price (See Notes)
$1.93 @1k
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Simplified Block Diagram

DS2710: Typical Operating Circuit DS2710: Typical Operating Circuit Zoom icon

Technical Docs

Design & Development

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Description

The DS2710 evaluation kit (EV kit) demonstrates operation of the DS2710 single-cell NiMH charger IC. The kit includes an assembled and tested PCB with a AA-size battery socket for easy connection to USB or other power source and a CD with documentation for the kit and device. The DS2710 EV kit fully charges a single NiMH chemistry cell and then provides a maintenance charge current to counteract self-discharging. Safety features include overvoltage protection, thermal protection, charge timeout, and alkaline-cell rejection by impedance test. An LED output displays the charging state.

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Features

  • Convenient Power Source and Load Connections
  • AA-Size NiMH Cell Socket
  • LED Outputs Charging Status
  • Compact PCB Layout
  • Fully Assembled

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Support & Training

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Filtered Search

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

Parameters

Parametric specs for Battery Chargers
Charging VIN (V) (max) 5.5
Max. ICHG (A) 4
Cell Chemistry NiCd
NiMH
# NiMH/ NiCd Cells 1
Protected VIN (V) (max) 5.5
Charger (V) 1.65
Oper. Temp. (°C) -20 to +70
Package/Pins TDFN/10
Budgetary
Price (See Notes)
$1.93 @1k

Key Features

  • Charges Single-Cell NiMH Cells
  • Switch-Mode Topologies Supported by Hysteretic Control Technique
  • Precharges Deeply Depleted Cells
  • Fast-Charges NiMH with -ΔV Termination Sensitivity of 2mV (typ)
  • Monitors Voltage, Temperature, and Time for Safety and Secondary Termination
  • Regulates Charge Current
  • Designed for External pMOS
  • Rail-to-Rail MOSFET Driver
  • Tiny 10-Pin TDFN Package (3mm x 4mm)

Applications/Uses

  • Battery-Powered Toys
  • Cordless Mouse
  • Small Rechargeable Devices
  • Voice Recorders

Description

The DS2710 is ideal for in-system charging of single-cell nickel metal hydride (NiMH) cells for low-current portable applications. Inputs to the DS2710 include USB voltage sources and 5V regulated adapters. Temperature, voltage, and charge time are monitored to provide proper fast-charging control algorithms for single-cell NiMH or nickel cadmium (NiCd) batteries. The DS2710 includes battery tests to detect defective or inappropriate cells such as alkaline primary batteries.

Simplified Block Diagram

DS2710: Typical Operating Circuit DS2710: Typical Operating Circuit 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.