LTC4011 High Efficiency Standalone Nickel Battery Charger Fae Tseru Dpircse Tnoi n Complete NiMH/NiCd Charger for1 to 16 Cells The LTC 4011 provides a complete, cost-effective nickel n NoMicrocontroller or Firmware Required battery fast charge solution in a small package using few n 550kHz Synchronous PWM Current Source Controller external components. A 550kHz PWM current source n NoAudible Noise with Ceramic Capacitors controller and all necessary charge initiation, monitoring n PowerPathControl Support andtermination controlcir cuitry areincluded. n ProgrammableCharge Current: 5%Accuracy The LTC4011 automatically senses the presence of a n WideInput V oltage Range:4.5V to34V DC adapter and battery insertion or removal. Heavily n Automatic Trickle Precharge discharged batteries are precharged with a trickle cur- n VFast Charge Termination rent. The LTC4011 can simultaneously use both V and n OptionalT/ t Fast ChargeT ermination T/t fast charge termination techniques and can detect n Automatic NiMH Top-OffCharge various battery faults. If necessary, a top-off charge is n ProgrammableT imer automatically applied to NiMH batteries after fast charg- n Automatic Recharge ing is completed. The IC will also resume charging if the n MultipleStatus Outputs batteryself-discharges after a full charge cycle. n MicropowerShutdown n All LTC4011 charging operations are qualified by actual 20-Lead Thermally EnhancedTSSOP Package charge time and maximum average cell voltage. Charging may also be gated by minimum and maximum temperature a acilpp Tsnoi limits. NiMH or NiCd fast charge termination parameters n Integratedor Standalone Battery Charger arepin-selectable. n Portable Instruments orConsumer Products Integrated PowerPath control support ensures that the n Battery-PoweredDiagnostics and Control system remains powered at all times without allowing load n Back-Up BatteryManagement transients to adversely affect charge termination. L, LT, LTC, LTM, LinearT echnology and theLinear logo are registered trademarksof Linear Technology Corporation. PowerPath is a trademark of Linear Technology Corporation. All other trademarks are theproperty of their respective owners. T lacipy a acilpp Tn oi 2ANiMH Battery Charger 2A NiMH Charge Cycle at 1C FROM ADAPTER 5V 10F INFET FAULT CHRG TOC READY 4.7H 10F 0.033F 0.068F 0.1F 4011fb LTC4011 a ulosb T e Mixa Mu M r a Tsgni p ni c no Farugi Tnoi (Note 1) TOP VIEW V (Input Supply) to GND......................... 0.3V to 36V CC DCIN 1 20 INFET DCIN to GND .............................................. 0.3V to 36V FAULT 2 19 READY FAULT, CHRG, V , V , SENSE, BAT, TOC CELL CDIV CHRG 3 18 V CC or READY to GND ........................... 0.3V to V + 0.3V CC CHEM 4 17 TGATE SENSE to BAT ........................................................0.3V GND 5 16 PGND CHEM, V or TIMER to GND ................ 0.3V to 3.5V 21 TEMP V 6 15 BGATE RT PGND to GND......................................................... 0.3V V 7 14 INTV TEMP DD Operating Ambient Temperature Range V 8 13 TOC CELL (Note 2) ........................................................ 0C to 85C 9 V 12 BAT CDIV Operating Junction Temperature (Note 3) ............. 125C TIMER 10 11 SENSE Storage Temperature Range ...................65C to 150C FE PACKAGE Lead Temperature (Soldering, 10 sec) .................. 300C 20-LEAD PLASTIC TSSOP T =125C, = 38C/W JMAX JA EXPOSED PAD(PIN 21)IS GND, MUST BE SOLDEREDTO PCB TO OBTAIN SPECIFIED THERMAL RESISTANCE o r D re i n Fro Ma Tnoi LEAD FREEFINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LTC4011CFE PBF LTC4011CFE TRPBF LTC4011CFE 20-Lead Plastic TSSOP 0C to85C LEADBASED FINISH TAPE AND REEL PARTMARKING PACKAGEDESCRIP TION TEMPERATURERANGE LTC4011CFE LTC4011CFE TR LTC4011CFE 20-Lead PlasticTSSOP 0C to 85C Consult LTC Marketing for parts specifiedwith wider operating temperature ranges. For more information on leadfree partmarking, go to: