DS2710

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) __________________________________...