Datasheet LTC4010 (Analog Devices)

LTC4010 High Efficiency Standalone Nickel Battery Charger FeaTures DescripTion n
Complete NiMH/NiCd Charger for 1 to 16 Cells
The LTC®4010 provides a complete, cost-effective nickel n
No Microcontroller or Firmware Required
battery fast charge solution in a small package using few n
550kHz PWM Current Source Controller
external components. A 550kHz PWM current source n
No Audible Noise with Ceramic Capacitors
controller and all necessary charge initiation, monitoring n
Wide Input Voltage Range: 5.5V to 34V
and termination control circuitry are included. n Programmable Charge Current: 5% Accuracy The LTC4010 automatically senses the presence of a DC n Automatic Trickle Precharge adapter and battery insertion or removal. When an external n –∆V Fast Charge Termination DC source is not present, the LTC4010 enters shutdown n Optional ∆T/∆t Fast Charge Termination and supply current drawn from an installed battery drops n Optional Temperature Qualification to the lowest possible level. Heavily discharged batteries n Automatic NiMH Top-Off Charge are precharged with a trickle current. The LTC4010 can n Programmable Timer simultaneously use both –∆V and ∆T/∆t fast charge ter- n Automatic Recharge mination techniques and can detect various battery faults. n Multiple Status Outputs If necessary, a top-off charge is automatically applied to n Micropower Shutdown NiMH batteries after fast charging is completed. The IC n 16-Lead Thermally Enhanced TSSOP Package will also resume charging if the battery self-discharges after a full charge cycle. applicaTions All LTC4010 charging operations are qualified by actual n Integrated or Standalone Battery Charger charge time and maximum average cell voltage. Charging n Portable Instruments or Consumer Products may also be gated by minimum and maximum temperature n Battery-Powered Diagnostics and Control limits. NiMH or NiCd fast charge termination parameters n Back-Up Battery Management are pin selectable. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Typical applicaTion
2A NiMH Battery Charger
FROM TO ADAPTER SYSTEM
2A NiMH Charge Cycle at 1C
9V LOAD 3k 10µF LTC4010 1.60 42 VCC FAULT TGATE 1.55 40 CHRG BA T READY TER BGATE 1.50 38 Y TEMPERA 47µH TIMER PGND TAGE (V) SINGLE CELL 1.45 VOLTAGE 36 49.9k SENSE 1.40 BATTERY 34 TURE (°C) GND 0.05Ω TEMPERATURE CHEM BAT 1.35 2A 32 SINGLE CELL VOL CHARGE 10k 10k 10µF CURRRENT V 1.30 1A 30 CDIV V TOP OFF CELL 2-CELL 33nF NiMH PACK 1.25 28 WITH 10k NTC 0 20 40 60 80 100 INTV V TIME (MINUTES) DD TEMP 0.1µF 68nF 4010 TA01b 4010 TA01a 4010fb Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Related Parts