Summary of LTC4015 – Multichemistry Buck Battery Charger Controller with Digital Telemetry System
The LTC4015 is a high-efficiency synchronous buck battery charger controller supporting Li-Ion/Polymer, LiFePO4, and Lead-Acid chemistries. It features digital telemetry, a Coulomb counter, 14-bit ADC, and Maximum Power Point Tracking. The device offers wide voltage ranges, input current limiting, and I2C programmability for custom algorithms and status monitoring within a compact QFN package.
Parts used in the LTC4015 Project:
- Synchronous Buck Battery Charger Controller
- Digital Telemetry System
- Coulomb Counter
- Integrated 14-Bit ADC
- I2C Serial Port
- Sense Resistors
- NTC Thermistor
- 38-Lead 5mm × 7mm QFN Package
Features
- Multichemistry Li-Ion/Polymer, LiFePO4, or Lead- Acid Battery Charger with Termination
- High Efficiency Synchronous Buck Battery Charger
- Digital Telemetry System Monitors VBAT, IBAT, RBAT,NTC Ratio (Battery Temperature), VIN, IIN, VSYSTEM, Die Temperature
- Coulomb Counter and Integrated 14-Bit ADC
- Wide Charging Input Voltage Range: 4.5V to 35V
- Wide Battery Voltage Range: Up to 35V
- Input Undervoltage Charge Current Limit Loop
- Maximum Power Point Tracking
- Optional I2C Serial Port Control
- Input Current Limit Prioritizes System Load Output
- Input and Output Ideal Diodes Provide Low Loss PowerPath™ Operation
- Instant-On Operation with Discharged Battery
Description
The LTC®4015 is a complete synchronous buck controller/ charger with pin selectable, chemistry specific charging and termination algorithms.
The LTC4015 can charge Li-Ion/Polymer, LiFePO4, or leadacid 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.
Available in a 38-Lead 5mm × 7mm QFN package.
Applications
- Portable Medical Instruments/Military Equipment
- Industrial Handhelds/Lighting
- Ruggedized Notebook/Tablet Computers
For More Details: LTC4015 – Multichemistry Buck Battery Charger Controller with Digital Telemetry System
- What battery chemistries does the LTC4015 support?
The LTC4015 can charge Li-Ion/Polymer, LiFePO4, or lead-acid batteries. - How is the battery charge voltage configured?
Battery charge voltage is pin selectable and adjustable via the I2C interface. - Does the device include temperature protection?
Yes, it includes NTC thermistor protection. - Can the input current limit be adjusted dynamically?
Yes, input current limit and charge current can be individually adjusted via the I2C serial port. - What safety features are included for lithium chemistry batteries?
The device supports safety timer and current termination algorithms for lithium chemistry batteries. - Does the LTC4015 support Maximum Power Point Tracking?
Yes, the device includes Maximum Power Point Tracking. - Is instant-on operation possible with a discharged battery?
Yes, the device provides Instant-On Operation with Discharged Battery. - What package type is the LTC4015 available in?
It is available in a 38-Lead 5mm × 7mm QFN package.
