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1. DESCRIPTION
The LTC®4015 is a complete synchronous buck controller/ charger with pin-selectable, chemistry specific charging and termination algorithms. The LTC4015EUHF#PBF canchargeLi-Ion/Polymer, LiFePO4, orleadacid batteries. Battery charge voltage is pin selectable and I2C adjustable. Input current limit and charge current can be accurately programmed with sense resistors and can be individually adjusted via the I2C serial port. A digital telemetry system monitors all system power parameters. Safety timer and current termination algorithms are supported for lithium chemistry batteries. The LTC4015 also includes automatic recharge, precharge (Li-Ion) and NTC thermistor protection. The LTC4015's I2C port allows user customization of charger algorithms, reading of charger status information, configuration of the maskable and programmable alerts, plus use and configuration of the Coulomb counter.
2. FEATURES
1. Multichemistry Li-Ion/Polymer, LiFePO4, or LeadAcid Battery Charger with Termination
2. High Efficiency Synchronous Buck Battery Charger
3. Digital Telemetry System Monitors VBAT, IBAT, RBAT,NTC Ratio (Battery Temperature), VIN, IIN, VSYSTEM, Die Temperature
4. Coulomb Counter and Integrated 14-Bit ADC
5. Wide Charging Input Voltage Range: 4.5V to 35V
6. Wide Battery Voltage Range: Up to 35V
7. Input Undervoltage Charge Current Limit Loop
8. Maximum Power Point Tracking
9. Optional I2C Serial Port Control
10. Input Current Limit Prioritizes System Load Output
11. Input and Output Ideal Diodes Provide Low Loss PowerPath™ Operation
12. Instant-On Operation with Discharged Battery
3. APPLICATIONS
1. Portable Medical Instruments/Military Equipment
2. Industrial Handhelds/Lighting
3. Ruggedized Notebook/Tablet Computers
4. PIN CONFIGURATION
5. PACKAGE DESCRIPTION
