BATTERY VOLTAGE (V) LTC4062 Standalone Linear Li-Ion Battery Charger with Micropower Comparator FEATURES DESCRIPTIO Charge Current Programmable Up to 1A The LTC 4062 is a full-featured, flexible, standalone linear Charges Single-Cell Li-Ion Batteries Directly from charger for single-cell Lithium-Ion batteries. It is capable USB Port of operating within USB power specifications. Preset Float Voltage with 0.35% Accuracy Both programmable time and programmable current based Micropower Comparator for Battery Monitoring termination schemes are available. Furthermore, the CHRG Thermal Regulation Maximizes Charge Rate open-drain status pin can be programmed to indicate the Without Risk of Overheating battery charge state according to the needs of the applica- Programmable Charge Current Detection/ tion. A precise low power comparator is available even Termination with no power applied as long as battery voltage is higher Programmable Charge Termination Timer than 2.5V. Additional safety features designed to maxi- Smart Pulsing Error Feature mize battery lifetime and reliability include the SmartStart TM SmartStart Prolongs Battery Life charging algorithm. 20A Charger Quiescent Current in Shutdown No external sense resistor or external blocking diode is Available in a Low Profile (0.75mm) 10-Lead required for charging due to the internal MOSFET architec- (3mm 3mm) DFN Package ture. Internal thermal feedback regulates the charge cur- U rent to maintain a constant die temperature during high APPLICATIO S power operation or high ambient temperature conditions. The charge current is programmed with an external resis- Handheld Computers tor. With power applied, the LTC4062 can be put into Portable MP3 Players shutdown mode to reduce the supply current to 20A and Digital Cameras the battery drain current to less than 5A. Without power , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. SmartStart is a trademark of Linear Technology Corporation. applied, the internal low power comparator can work All other trademarks are the property of their respective owners. sinking only 10A from the battery. Protected by U.S. Patents, including 6522118. Other features include smart recharge, USB C/5 current programming input and undervoltage lockout. TYPICAL APPLICATIO Complete Charge Cycle (1100mAh Battery) 900 4.3 800mA Single-Cell Li-Ion Battery Charger 800 4.2 (C/10 Termination) 700 4.1 V IN V OUT BAT > 3V BAT < 3V CC 4.3V TO 8V 600 4.0 LTC4062 100k 500 3.9 EN 800mA BATTERY C/5 BATTERY 400 3.8 BAT CURRENT VOLTAGE TIMER 1F 715k 300 3.7 PROG + I IN + DET SINGLE-CELL 200 3.6 GND Li-Ion BATTERY 619 347k V = 5V 100 CC 3.5 T = 25C A 4062 TA01 0 3.4 0 0.5 1.0 1.5 2.0 2.5 3.0 TIME (HOURS) 4062 TA01b 4062fb 1 CHARGE CURRENT (mA) U ULTC4062 UUW ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1) TOP VIEW Input Supply Voltage (V ) ........................ 0.3V to 10V CC BAT 1 10 V CC + EN, OUT, CHRG, IN , PROG, C/5, BAT ....... 0.3V to 10V + IN 2 9 PROG TIMER 3 11 8 I TIMER, I ..................................... 0.3V to V +0.3V DET DET CC OUT 4 7 EN BAT Short-Circuit Duration ...........................Continuous CHRG 5 6 C/5 V Pin Current ......................................................... 1A CC DD PACKAGE BAT Pin Current ......................................................... 1A 10-LEAD (3mm 3mm) PLASTIC DFN Maximum Junction Temperature .......................... 125C T = 125C, = 40C/W (NOTE 3) JMAX JA EXPOSED PAD IS GROUND (PIN 11) Operating Temperature Range (Note 2) ... 40C to 85C MUST BE SOLDERED TO PCB Storage Temperature Range .................. 65C to 125C ORDER PART NUMBER DD PART MARKING LTC4062EDD LBJT Order Options Tape and Reel: Add TR Lead Free: Add PBF Lead Free Tape and Reel: Add TRPBF Lead Free Part Marking: