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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 a digital telemetry system monitoring voltage, current, temperature, and die status, alongside a coulomb counter and 14-bit ADC. The device offers wide input and battery voltage ranges up to 35V, maximum power point tracking, and ideal diodes for low-loss power path operation with instant-on capability from discharged batteries.
Parts used in the LTC4015 Battery Charger Project:
- Synchronous Buck Controller/Charger
- Digital Telemetry System
- Coulomb Counter
- Integrated 14-Bit ADC
- I2C Serial Port Control Interface
- Sense Resistors
- Input Current Limit Loop
- Maximum Power Point Tracking Module
- Input and Output Ideal Diodes
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
Typical Application
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.
For more detail: LTC4015 – Multichemistry Buck Battery Charger Controller with Digital Telemetry System
- What battery chemistries does the LTC4015 support?
The device charges Li-Ion/Polymer, LiFePO4, or lead-acid batteries. - How can the charge voltage be adjusted?
Battery charge voltage is pin selectable and I2C adjustable. - Can the input current limit be programmed?
Yes, it can be accurately programmed with sense resistors and individually adjusted via the I2C serial port. - Does the device monitor battery temperature?
Yes, the digital telemetry system monitors the NTC Ratio for battery temperature. - What is the maximum input voltage range?
The wide charging input voltage range is 4.5V to 35V. - Does the charger support Maximum Power Point Tracking?
Yes, the device includes Maximum Power Point Tracking functionality. - How does the device handle discharged batteries?
It provides Instant-On Operation with Discharged Battery. - What components provide low loss power path operation?
Input and Output Ideal Diodes provide low loss power path operation.
