LT3652HV - Power Tracking 2A Battery Charger

Features

  • Input Supply Voltage Regulation Loop for Peak Power Tracking in (MPPT) Solar Applications
  • Wide Input Voltage Range:
    4.95V to 34V (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 18V Accommodates 4-Cell Li-Ion/Polymer, 5-Cell LiFePO4, Lead-Acid Chemistries
  • Parallelable for Higher Output Current
  • 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

Typical Application

LT3652HV Typical Application
LT3652HV Typical Application

Description

The LT3652HV is a complete monolithic step-down battery charger that operates over a 4.95V to 34V input range. The LT3652HV provides a constant-current/constant-voltage charge characteristic, with maximum charge current externally programmable up to 2A. The charger employs a 3.3V float voltage feedback reference, so any desired battery float voltage up to 18V can be programmed with a resistor divider.

The LT3652HV employs an input voltage regulation loop, which reduces charge current if the input voltage falls below a programmed level, set with a resistor divider. When the LT3652HV is powered by a solar panel, the input regulation loop is used to maintain the panel at peak output power.

The LT3652HV can be configured to terminate charging when charge current falls below 1/10 of the programmed maximum (C/10). Once charging is terminated, the LT3652HV enters a low-current (85μA) standby mode. An auto-recharge feature starts a new charging cycle if the battery voltage falls 2.5% below the programmed fl oat voltage. The LT3652HV also contains a programmable safety timer, used to terminate charging after a desired time is reached. This allows top-off charging at currents less than C/10.

 Vin MaxVfloat MaxFeatures
LT3652 32V 14.4V internal reverse blocking
Vbat<4.2V
LT3652HV 34V 18V  

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
Drawing
RoHS
LT3652HVEDD#PBF 3x3 DFN-12 DD E 05-08-1725 Yes
LT3652HVEDD#TRPBF 3x3 DFN-12 DD E 05-08-1725 Yes
LT3652HVEMSE#PBF MS-12E MSE E 05-08-1666 Yes
LT3652HVEMSE#TRPBF MS-12E MSE E 05-08-1666 Yes
LT3652HVIDD#PBF 3x3 DFN-12 DD I 05-08-1725 Yes
LT3652HVIDD#TRPBF 3x3 DFN-12 DD I 05-08-1725 Yes
LT3652HVIMSE#PBF MS-12E MSE I 05-08-1666 Yes
LT3652HVIMSE#TRPBF MS-12E MSE I 05-08-1666 Yes


LT3652HV Package Drawing
LT3652HV Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LT3652HVEDD#PBF 3x3 DFN-12 E $4.86 $3.40 Yes
LT3652HVEDD#TRPBF 3x3 DFN-12 E $3.46 Yes
LT3652HVEMSE#PBF MS-12E E $4.86 $3.40 Yes
LT3652HVEMSE#TRPBF MS-12E E $3.46 Yes
LT3652HVIDD#PBF 3x3 DFN-12 I $5.29 $3.70 Yes
LT3652HVIDD#TRPBF 3x3 DFN-12 I $3.76 Yes
LT3652HVIMSE#PBF MS-12E I $5.29 $3.70 Yes
LT3652HVIMSE#TRPBF MS-12E I $3.76 Yes
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC1688A LT3652HVEDD Demo Board | 17.7V to 34VIN, Buck 12V Lead Acid@2A, MPPC for Solar Power Input $150.00
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Click here to view our complete list of demo boards

Applications

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

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Design Tools

LTspice

LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice

To launch a ready to run LTspice demonstration circuit for this part:

  • Step 1: If you have not installed LTspice on this computer, download and install LTspice
  • Step 2: Once LTspice is installed, click on the link(s) below to launch the simulation
  • Step 3: If LTspice does not automatically open after clicking the link above, you can instead run the simulation by right clicking on the link and selecting "Save Target As." After saving the file to your computer, start LTspice and open the demonstration circuit by selecting 'Open' from the 'File' menu

To explore other ready to run LTspice demonstration circuits, please visit our Demo Circuits Collection.

Models for the following parts are available in LTspice:
LT3652
LT3652HV

Technical Support