Analog Devices LT3652HV

Description

The LT®3652HV is a complete monolithic step-down batterycharger that operates over a 4.95V to 34V input range.The LT3652HV provides a constant-current/constant-voltagecharge characteristic, with maximum charge currentexternally programmable up to 2A. The charger employsa 3.3V float voltage feedback reference, so any desiredbattery float voltage up to 18V can be programmed with aresistor divider.The LT3652HV employs an input voltage regulation loop,which reduces charge current if the input voltage falls belowa programmed level, set with a resistor divider. When theLT3652HV is powered by a solar panel, the input regulationloop is used to maintain the panel at peak output power.The LT3652HV can be configured to terminate charging whencharge current falls below 1/10 of the programmed maximum(C/10). Once charging is terminated, the LT3652HV enters alow-current (85μA) standby mode. An auto-recharge featurestarts a new charging cycle if the battery voltage falls 2.5%below the programmed float voltage. The LT3652HV alsocontains a programmable safety timer, used to terminatecharging after a desired time is reached. This allows top-offcharging at currents less than C/10.

Features

Input Supply Voltage Regulation Loop for PeakPower Tracking in (MPPT) Solar Applicationsn Wide Input Voltage Range: 4.95V to 34V (40V Abs Max)n Programmable Charge Rate Up to 2An User Selectable Termination: C/10 or On-BoardTermination Timern Resistor Programmable Float Voltage Up to 18VAccommodates 4-Cell Li-Ion/Polymer, 5-CellLiFePO4, Lead-Acid Chemistriesn Parallelable for Higher Output Currentn 1MHz Fixed Frequencyn 0.5% Float Voltage Reference Accuracyn 5% Charge Current Accuracyn 2.5% C/10 Detection Accuracyn Binary-Coded Open-Collector Status Pinsn Thermally Enhanced 3mm × 3mm DFN and MSEPackages

Typical applications

• Remote Monitoring Stations
• Portable Handheld Instruments
• Solar Powered Applications
• Battery Charging from Current Limited Adapter
• 12V to 24V Automotive Systems

More information

• Datasheet
• IC product information