LTC4060 Standalone Linear NiMH/NiCd Fast Battery Charger FEATURES DESCRIPTIO Complete Fast Charger Controller for Single, The LTC 4060 is a complete fast charging system for NiMH 2-, 3- or 4-Series Cell NiMH/NiCd Batteries or NiCd batteries. Just a few external components are No Firmware or Microcontroller Required needed to design a standalone linear charging system. Termination by V, Maximum Voltage or An external PNP transistor provides charge current that is Maximum Time user programmable with a resistor. A small external capaci- No Sense Resistor or Blocking Diode Required tor sets the maximum charge time. No external current Automatic Recharge Keeps Batteries Charged sense resistor is needed, and no blocking diode is required. Programmable Fast Charge Current: 0.4A to 2A The IC automatically senses the DC input supply and bat- Accurate Charge Current: 5% at 2A tery insertion or removal. Heavily discharged batteries are Fast Charge Current Programmable Beyond 2A with initially charged at a C/5 rate before a fast charge is applied. External Sense Resistor Fast charge is terminated using the V detection method. Automatic Detection of Battery Backup termination consists of a programmable timer and Precharge for Heavily Discharged Batteries battery overvoltage detector. An optional external NTC ther- Optional Temperature Qualified Charging mistor can be used for temperature-based qualification of Charge and AC Present Status Outputs Can Drive LED charging. An optional programmable recharge feature au- Automatic Sleep Mode with Input Supply Removal tomatically recharges batteries after discharge. Negligible Battery Drain in Sleep Mode: <1A Manual Shutdown Manual shutdown is accomplished with the SHDN pin, while Input Supply Range: 4.5V to 10V removing input power automatically puts the LTC4060 into Available in 16-Lead DFN and TSSOP Packages sleep mode. During shutdown or sleep mode, battery drain U is <1A. APPLICATIO S The LTC4060 is available in both low profile (0.75mm) 16- Portable Computers, Cellular Phones and PDAs pin 5mm 3mm DFN and 16-lead TSSOP packages. Both Medical Equipment feature exposed metal die mount pads for optimum ther- Charging Docks and Cradles mal performance. Portable Consumer Electronics , LTC and LT are registered trademarks of Linear Technology Corporation. TYPICAL APPLICATIO 2-Cell, 2A Standalone NiMH Fast Charger with 2-Cell NiMH Charging Profile Optional Thermistor and Charge Indicator 3.40 V = 5V IN V TERMINATION 330 V CC 3.30 SHDN ACP CHARGE CHRG SENSE NTC DRIVE LTC4060 3.20 PROG BAT + NTC NiMH 698 ARCT TIMER BATTERY SEL0 CHEM 1.5nF 3.10 SEL1 PAUSE 0 10 20 30 40 50 60 GND 4060 TA01 CHARGE TIME (MINUTES) 4060 TA01b 4060f 1 BATTERY VOLTAGE (V) U ULTC4060 ABSOLUTE MAXIMUM RATINGS (Note 1) V to GND ............................................... 0.3V to 11V Operating Ambient Temperature Range CC Input Voltage (Note 2) ............................................. 40C to 85C SHDN, NTC, SEL0, SEL1, PROG, ARCT, Operating Junction Temperature (Note 3) ........... 125C BAT, CHEM, TIMER, PAUSE ...... 0.3V to V + 0.3V Storage Temperature Range CC Output Voltage TSSOP Package ............................... 65C to 150C CHRG, ACP, DRIVE ................... 0.3V to V + 0.3V DFN Package .................................... 65C to 125C CC Output Current (SENSE) ...................................... 2.2A Lead Temperature (Soldering, 10 sec) Short-Circuit Duration (DRIVE) ...................... Indefinite TSSOP Package ................................................ 300C PACKAGE/ORDER INFORMATION TOP VIEW ORDER PART ORDER PART TOP VIEW NUMBER NUMBER DRIVE 1 16 GND DRIVE 1 16 GND BAT 2 15 CHRG BAT 2 15 CHRG LTC4060EDHC LTC4060EFE SENSE 3 14 V SENSE 3 14 V CC CC TIMER 4 13 ACP TIMER 4 13 ACP 17 17 SHDN 5 12 CHEM SHDN 5 12 CHEM PAUSE 6 11 NTC PAUSE 6 11 NTC PROG 7 10 SEL1 PROG 7 10 SEL1 DHC PART FE PART ARCT 8 9 SEL0 ARCT 8 9 SEL0 MARKING MARKING FE PACKAGE DHC16 PACKAGE 16-LEAD PLASTIC TSSOP 4060 4060EFE 16-LEAD (5mm 3mm) PLASTIC DFN T = 125C, = 37C/W T = 125C, = 37C/W JMAX JA JMAX JA EXPOSED PAD (PIN 17) IS GND EXPOSED PAD (PIN 17) IS GND MUST BE SOLDERED TO PCB TO OBTAIN MUST BE SOLDERED TO PCB TO OBTAIN = 37C/W OTHERWISE = 140C = 37C/W OTHERWISE = 135C JA JA JA JA Consult LTC Marketing for parts specified with wider operating temperature ranges. ELECTRICAL CHARACTERISTICS The indicates specifications which apply over the full operating temperature range, otherwise specifications are at T = 25C. V = 5V, V = 2.8V, GND = 0V unless otherwise specified. All A CC BAT currents into the device pins are positive and all currents out of the device pins are negative. All voltages are referenced to GND unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS V Supply CC V Operating Voltage Range (Note 4) 4.50 10 V CC I V Supply Current (Note 9) I = 2mA (R = 698), 2.9 4.3 mA CC CC PROG PROG PAUSE = V CC I V Supply Shutdown Current SHDN = 0V 250 325 A SD CC I Battery Pin Leakage Current in Shutdown (Note 5) V = 2.8V, SHDN = 0V 1 0 1 A BSD BAT I Battery Pin Leakage Current in Sleep (Note 6) V = 0V, V = 5.6V 1 0 1 A BSL CC BAT V Undervoltage Lockout Exit Threshold SEL0 = 0, SEL1 = 0 and SEL0 = V , 4.25 4.36 4.47 V UVI1 CC SEL1 = 0, V Increasing CC V Undervoltage Lockout Entry Threshold SEL0 = 0, SEL1 = 0 and SEL0 = V , 4.15 4.26 4.37 V UVD1 CC SEL1 = 0, V Decreasing CC 4060f 2 U W U U WWW