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LTC1960 Datasheet(PDF) 1 Page - Linear Technology |
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LTC1960 Datasheet(HTML) 1 Page - Linear Technology |
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1 / 24 page  LTC1960 1 1960fa DESCRIPTIO FEATURES APPLICATIO S TYPICAL APPLICATIO The LTC ®1960 is a highly-integrated battery charger and selector intended for portable products using dual smart batteries. A serial SPI interface allows an external microcontroller to control and monitor status of both batteries. A proprietary PowerPath architecture supports simulta- neous charging or discharging of both batteries. Typical battery run times are extended by 10%, while charging times are reduced by up to 50%. The LTC1960 automati- cally switches between power sources in less than 10 µs to prevent power interruption upon battery or wall adapter removal. The synchronous buck battery charger delivers 95% efficiency with only 0.5V dropout voltage, and prevents audible noise in all operating modes. Patented* input current limiting with 5% accuracy charges batteries in the shortest possible time without overloading the wall adapter. The LTC1960’s 5mm × 7mm 38-pin QFN and 36-pin narrow SSOP packages allow implementation of a com- plete SBS-compliant dual battery system while consum- ing minimum PCB area. ■ Complete Dual-Battery Charger/Selector System ■ Serial SPI Interface Allows External µC Control and Monitoring ■ Simultaneous Dual-Battery Discharge Extends Run Time by Typically 10% ■ Simultaneous Dual-Battery Charging Reduces Charging Time by Up to 50% ■ Automatic PowerPath TM Switching in <10 µs Prevents Power Interruption ■ Circuit Breaker Protects Against Overcurrent Faults ■ 5% Accurate Adapter Current Limit Maximizes Charging Rate* ■ 95% Efficient Synchronous Buck Charger ■ Charger Has Low 0.5V Dropout Voltage ■ No Audible Noise Generation, Even with Ceramic Capacitors ■ 11-Bit VDAC Delivers 0.8% Voltage Accuracy ■ 10-Bit IDAC Delivers 5% Current Accuracy ■ VIN Up to 32V; VBATT Up to 28V ■ Available in 5mm × 7mm 38-Pin QFN and 36-Pin Narrow SSOP Packages Dual Battery Charger/ Selector with SPI Interface LTC1960 Dual Battery/Selector System Architecture ■ Portable Computers ■ Portable Instruments LTC1960 MICROCONTROLLER DC IN 4 SYSTEM POWER SMBus 1960 TA01 BAT2 BAT1 SPI Dual vs Sequential Charging TIME (MINUTES) 3500 3000 2500 2000 1500 1000 500 0 3500 3000 2500 2000 1500 1000 500 0 1960 G10 0 50 100 150 200 250 300 BAT1 CURRENT BAT2 CURRENT SEQUENTIAL DUAL BAT1 CURRENT 100 MINUTES BATTERY TYPE: 10.8V Li-Ion (MOLTECH NI2020) REQUESTED CURRENT = 3A REQUESTED VOLTAGE = 12.3V MAX CHARGER CURRENT = 4.1A BAT2 CURRENT , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. PowerPath is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. *Protected by U.S. Patents, including 5481178, 5723970, 6304066, 6580258. |
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