LTC4011 Datasheet | Linear Technology

High Efficiency Standalone Nickel Battery Charger Features n plete Ni MH/Ni Cd Charger for 1 to 16 Cells n No Microcontroller or Firmware Required n 550k Hz Synchronous PWM Current Source Controller n No Audible Noise with Ceramic Capacitors n Power Path™ Control Support n Programmable Charge Current: 5% Accuracy n Wide Input Voltage Range: 4.5V to 34V n Automatic Trickle Precharge n - ∆V Fast Charge Termination n Optional ∆T/∆t Fast Charge Termination n Automatic Ni MH Top-Off Charge n Programmable Timer n Automatic Recharge n Multiple Status Outputs n Micropower Shutdown n 20-Lead Thermally Enhanced TSSOP Package Applications n Integrated or Standalone Battery Charger n Portable Instruments or Consumer Products n Battery-Powered Diagnostics and Control n Back-Up Battery Management L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. Power Path is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Description The LTC®4011 provides a plete, cost-effective nickel battery fast charge solution in a small package using few external ponents. A 550k Hz PWM current source controller and all necessary charge initiation, monitoring and termination control circuitry are included. The LTC4011 automatically senses the presence of a DC adapter and battery insertion or removal. Heavily discharged batteries are precharged with a trickle current. The LTC4011 can simultaneously use both - ∆V and ∆T/∆t fast charge termination techniques and can detect various battery faults. If necessary, a top-off charge is automatically applied to Ni MH batteries after fast charging is pleted. The IC will also resume charging if the battery self-discharges after a full charge cycle. All LTC4011 charging operations are qualified by actual charge time and maximum average cell voltage. Charging may also be gated by minimum and maximum temperature limits. Ni MH or Ni Cd...