Analog Devices Inc. LT3652 Power Tracking 2A Battery Chargers
Analog Devices Inc. LT3652 Power Tracking 2A Battery Chargers are designed for Solar Power and operate at a 4.95V to 32V input voltage range. The LT3652 battery chargers feature a constant-current/constant-voltage charge specification, with maximum charge current externally programmable up to 2A. Additionally, the chargers offer a 3.3V float voltage feedback reference, allowing any battery float voltage up to 14.4V to be programmed with a resistor divider.
The LT3652 features an input voltage regulation loop, reducing charge current if the input voltage falls below a programmed level, and set with a resistor divider. The input regulation loop is used to maintain the panel at peak output power when the LT3652 is powered by a solar panel.
Charging can be terminated by configuring the LT3652 battery chargers when the charge current falls below 1/10 of the programmed maximum (C/10). Once charging is terminated, the device enters a low-current (85µA) standby mode. A new charging cycle is started by an auto-recharge feature if the battery voltage falls 2.5% below the programmed float voltage. The LT3652 also provides a programmable safety timer, allowing top-off charging at currents less than C/10 after the desired time is reached.
Features
- Input Supply Voltage Regulation Loop for Peak Power Tracking in (MPPT) Solar Applications
- Wide Input Voltage Range: 4.95V to 32V (40V Abs Max)
- Programmable Charge Rate Up to 2A
- User Selectable Termination: C/10 or On-Board Termination Timer
- Resistor Programmable Float Voltage Up to 14.4V Accommodates Li-Ion/Polymer, LiFePO4, SLA Chemistries
- No VIN Blocking Diode Required for Battery Voltages ≤4.2V
- 1MHz Fixed Frequency
- 0.5% Float Voltage Reference Accuracy
- 5% Charge Current Accuracy
- 2.5% C/10 Detection Accuracy
- Binary-Coded Open-Collector Status Pins
- Thermally Enhanced 12-Lead 3mm × 3mm DFN and MSE Packages
Applications
- Solar Powered Applications
- Remote Monitoring Stations
- LiFePO4 (Lithium Phosphate) Applications
- Portable Handheld Instruments
- 12V to 24V Automotive Systems
Additional Resources
- Solar Battery Charger Maintains High Efficiency in Low Light
- Battery Charger’s Unique Input Regulation Loop Simplifies Solar Panel
- Designing a Solar Cell Battery Charger
- Practical Ambient Energy Harvesting for WSNs
- 20V Battery Gas Gauge
- High Voltage Battery Charging and Management Solutions
- Energy Harvesting Now
- Techniques to Maximize Solar Panel Power Output
- LT3652 Solar Battery Charger Maintains High Efficiency in Low Light
- Power-Tracking Battery-Charger IC Supports Solar-Power Systems
- Breakthrough 2A Solar Battery Charger Matches Peak Power Tracking
Videos
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