Analog Devices Inc. LT3652 Power Tracking 2A Battery Chargers
Analog Devices 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 of 4.95V to 32V (40V Abs max)
- Programmable charge rate up to 2A
- User selectable termination of 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 is 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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