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DS2712

Maxim Integrated Products
Part Number DS2712
Manufacturer Maxim Integrated Products
Description (DS2711 / DS2712) Loose Cell NiMH Chargers
Published May 25, 2011
Detailed Description 19-5826; Rev 4/11 GENERAL DESCRIPTION The DS2711 and DS2712 are ideal for in-system or stand-alone charging of 1 or 2 A...
Datasheet PDF File DS2712 PDF File

DS2712
DS2712

Overview
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 LED1 Cell 1 Status 4 VSS Ground Reference and ChipSupply Return 5 LED2 Cell 2 Status, Mode-Select Input 6 CSOUT Current-Sense Output 7 VN1 Current-Sense + Input 8 VN0 Current-Sense - Input 9 DMSEL Display-Mode Select 10 CTST Cell Test Threshold Set 11 TMR Charge Timer Set 12 VDD Chip-Supply Input (4.
0V to 5.
5V) 13 THM1 Cell 1 Thermistor Input 14 THM2 Cell 2 Thermistor Input 15 VP1 Cell 1 Positive-Terminal Sense Input 16 VP2 Cell 2 Positive-Terminal Sense Input 1 of 15 DS2711/...


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