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.


  • 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


  • Solar Powered Applications
  • Remote Monitoring Stations
  • LiFePO4 (Lithium Phosphate) Applications
  • Portable Handheld Instruments
  • 12V to 24V Automotive Systems


Block Diagram

Block Diagram - Analog Devices Inc. LT3652 Power Tracking 2A Battery Chargers
Published: 2019-06-12 | Updated: 2022-03-11