Single-Cell NiMH Charger
Rev 0; 4/08
Single-Cell NiMH Charger
General Description
The DS2710 is ideal for in-system charging of single-cell nick...
Description
Rev 0; 4/08
Single-Cell NiMH Charger
General 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. ♦ 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)
Features
DS2710
Applications
Small Rechargeable Devices Voice Recorders Cordless Mouse Battery-Powered Toys
Ordering Information
PART DS2710G+ DS2710G+T&R PIN-PACKAGE 10 TDFN-EP* 10 TDFN-EP*
+Denotes a lead(Pb)-free/RoHS-compliant package. T&R = Tape and reel. *EP = Exposed pad.
Typical Operating Circuit
TOP VIEW
CHARGE SOURCE VSS CS VDD VP1 CS VDD THM THM VN0 SENSE GROUND *EXPOSED PAD. VN1 NiMH CELL STATUS 1 2 3 4 5 *EP
Pin Configuration
+
10 9
VP1 VN1 VN0 TMR CTEST
DS2710
8 7 6
DS2710
TDFN (3mm × 4mm)
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