35V Buck Battery Charger with Digital Telemetry de al Dio e d I l Dua trollers Con VIN = 8V to 35V System e l Diod a e d I Dual trollers Con to e Up g r a h C ls 8 Cel LTC4015 ICHARGE 10A+ I2C Up to e g r a Ch ls 8 Cel Multichemistry, Coulomb Counter & Battery Health Monitoring The LTC®4015 is a complete synchronous buck controller/charger for single or multiple Li-Ion/Polymer, LiFePO4 or lead-acid battery chemistries with on-chip termination algorithms. Many system parameters can be programmed and/or digitally monitored, including battery voltage and current, battery series resistance, input voltage & current plus battery & die temperatures, all via an I 2C port. Battery health can be tracked with the battery series resistance measurement and integrated coulomb counter. The LTC4015 also supports stand-alone applications with no digital programming required. Features Info & Free Samples www.linear.com/product/LTC4015 0.5 100 1-800-4-LINEAR 95 90 0.0 85 80 –0.5 75 70 –1.0 65 Efficiency QC Error 60 –1.5 Coulomb Counter Error (%) • Multichemistry Charger with Termination • High Efficiency Synchronous Buck Topology • Input Voltage Range: 4.5V to 35V • Digital Telemetry System Monitors for Most Parameters • Coulomb Counter and 14-Bit ADC •PowerPath™ Control for Instant-on Operation • Maximum Power Point Tracking Charger Efficiency & Coulomb Counter Error vs. Charge Current Efficiency (%) 55 50 0.1 1 Charge Current (A) 10 –2.0 , LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and PowerPath is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners.