DS2712

19-5826; Rev 4/11 GENERAL DESCRIPTION The DS2711 and DS2712 are ideal for in-system or stand-alone charging of 1 or 2 AA or AAA NiMH “loose” cells. 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 DS2711/DS2712 support series and parallel topologies, with independent monitoring and control of each cell. Charging of NiCd chemistry cells is also supported. APPLICATIONS Desktop/Stand-Alone Chargers (AAA/AA) Digital Still Cameras Music Players Games Toys FEATURES  Charge 1 or 2 NiMH Cells  Detect and Avoid Charging Alkaline Cells  Precharge Deeply Depleted Cells  Fast Charge NiMH with -∆V Termination Sensitivity of 2mV (typ)  Monitor Voltage, Temperature, and Time for Safety and Secondary Termination  Regulate Charge Current: Linear Control (DS2711) Switch-Mode Control (DS2712)  Drive pMOS or pnp-Type Pass Element or Switch, or an Optocoupler  Compatible with Popular Optocouplers and Integrated Primary-Side PWM Controllers  Small 16-Pin SO or TSSOP Packages DS2711/DS2712 Loose-Cell NiMH Chargers PIN CONFIGURATION CC1 CC2 LED1 VSS LED2 CSOUT VN1 VN0 1 2 3 4 5 6 7 8 16 VP2 15 VP1 14 THM2 13 THM1 12 VDD 11 TMR 10 CTST 9 DMSEL SO (150 mils) TSSOP (4.4mm) PIN DESCRIPTION PIN NAME FUNCTION 1 CC1 Cell 1 Charge-Control Output 2 CC2 Cell 2 Charge-Control Output 3 L...