LTM8071IY#PBF

The LTM�8061 is a high efficiency 32V, 2A μModule� standalone Li-Ion battery charger. It is optimized for one and two-cell packs, with fixed float voltage options: 4.1V, 4.2V, 8.2V and 8.4V. The LTM8061 provides a constant-current/ constant-voltage charge characteristic, with maximum charge current up to 2A. A precondition feature trickle charges a depleted battery, and bad battery detection provides a signal and suspends charging if a battery does not respond to preconditioning. The LTM8061 can be configured to terminate charging when charge current falls to one-tenth the programmed maximum current or to use an internal timer if a timebased termination scheme is desired. Once charging is terminated, the LTM8061 enters a low current standby mode. An auto-restart feature starts a new charge cycle if the battery voltage drops 2.5% from the float voltage, or if a new battery is inserted into a charging system. The LTM8061 is packaged in a thermally enhanced, compact (9mm � 15mm � 4.32mm) over-molded land grid array (LGA) package suitable for automated assembly by standard surface mount equipment. The LTM8061 is RoHS compliant.

32V, 2A �Module Li-Ion/ Polymer Battery Charger FEATURES
DESCRIPTION

The is a high efficiency 32V, 2A Module� standalone Li-Ion battery charger. It is optimized for one and two-cell packs, with fixed float voltage options: 4.2V, 8.2V and 8.4V. The LTM8061 provides a constantcurrent/constant-voltage charge characteristic, with maximum charge current 2A. A precondition feature trickle charges a depleted battery, and bad battery detection provides a signal and suspends charging if a battery does not respond to preconditioning. The LTM8061 can be configured to terminate charging when charge current falls to one-tenth the programmed maximum current or to use an internal timer if a timebased termination scheme is desired. Once charging is terminated, the LTM8061 enters a low current standby mode. An auto-restart feature starts a new charge cycle if the battery voltage drops 2.5% from the float voltage, if a new battery is inserted into a charging system. The LTM8061 is packaged in a thermally enhanced, compact � 4.32mm) over-molded land grid array (LGA) package suitable for automated assembly by standard surface mount equipment. The LTM8061 is RoHS compliant.

Wide Input Voltage Range: 32V (40V Absolute Maximum) Float Voltage Options: 8.2V, 8.4V Programmable Charge Current: to 2A User-Selectable Charge Termination: C/10 or Onboard Termination Timer Dynamic Charge Rate Programming/Soft-Start Pin Programmable Input Current Limit Optional Reverse Input Protection NTC Resistor Temperature Monitor 0.5% Float Voltage Accuracy Bad-Battery Detection with Auto-Reset Tiny, Low Profile � 4.32mm) Surface Mount LGA Package

APPLICATIONS

Industrial Handheld Instruments to 24V Automotive and Heavy Equipment Professional Video/Camera Chargers

L, LT, LTC, LTM, Linear Technology, Linear logo, Module and PolyPhase are registered trademarks and PowerPath is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners

Standalone Single Cell 2A Li-Ion Battery Charger with C/10 Termination from to 32V Input

A B BANK 2 C BAT D BANK 1 E GND VIN L BANK 5 BANK 4 BANK 3 VINC /CLP VINA BIAS RNG/SS FAULT CHRG NTC TMR RUN

VINA, VINC/CLP, VIN....................................................40V RUN, CHRG, FAULT...................................VIN 0.5, 40V TMR, RNG/SS, NTC.................................................2.5V BIAS, BAT.................................................................10V Internal Operating Temperature (Note 2)................................................................. 125�C Maximum Body Solder Temperature..................... 245�C

LGA PACKAGE s 4.32mm) TJMAX = 17.0�C/W, JCtop = 16.2�C/W, JCbottom = 11.2�C/W, values determined per JEDEC 51-9, 51-12 Weight = 1.7g

LEAD FREE FINISH LTM8061EV-8.4#PBF LTM8061IV-8.4#PBF TRAY LTM8061EV-8.4#PBF LTM8061IV-8.4#PBF PART MARKING* LTM8061V-82 LTM8061V-84 PACKAGE DESCRIPTION � 4.32mm) TEMPERATURE RANGE to 125�C

Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ This product is only offered in trays. For more information go to: http://www.linear.com/packaging/

PARAMETER VIN Operating Voltage VIN Start Voltage VIN OVLO Threshold VIN OVLO Hysteresis VIN UVLO Threshold VIN UVLO Hysteresis VINA to VINC /CLP Diode Forward Voltage Drop BAT Float Voltage VINA Current 2A LTM8061-4.1

The l denotes the specifications which apply over the full internal operating temperature range, otherwise specifications are = 25�C. RUN = 2V.

Maximum BAT Charge Current BAT Recharge Threshold Voltage

(Note 3) LTM8061-4.1/LTM8061-4.2, Relative to BAT Float Voltage LTM8061-8.2/LTM8061-8.4, Relative to BAT Float Voltage LTM8061-8.2 LTM8061-8.4 Standby Mode RUN = 0.4V

BAT Precondition Threshold Hysteresis Voltage Input Supply Current Minimum BIAS Voltage for Proper Operation VINC /CLP Threshold Voltage VINC /CLP Input Bias Current NTC Range Limit Voltage (High) NTC Range Limit Voltage (Low) NTC Threshold Hysteresis NTC Disable Impedance NTC Bias Current RNG/SS Bias Current Charge Programming: VRNG/SS/BAT Current RUN Threshold Voltage RUN Hysteresis Voltage RUN Input Bias Current CHRG, FAULT Output Low Voltage TMR Charge/Discharge Current TMR Disable Threshold Voltage C/10 Termination Current Operating Frequency RNG/SS Open 0.1 10mA Load VRUN Rising VNTC Rising VNTC Falling For Both High and Low Range Limits (Note 4) VNTC = 0.8V

Feature

Applications