Power Management Battery Management Battery Charger IC Switching Battery Chargers

LTM8061 - 32V, 2A μModule (Power Module) Li-Ion/ Polymer Battery Charger
more options

LTC2942 - Battery Gas Gauge with Temperature, Voltage Measurement

LTC2953 - Push Button On/Off Controller with Voltage Monitoring

LT1511 - Constant-Current/ Constant-Voltage 3A Battery Charger with Input Current Limiting

Features

  • Simple Design to Charge NiCd, NiMH and Lithium Rechargeable Batteries—Charging Current Programmed by Resistors or DAC
  • Adapter Current Loop Allows Maximum Possible Charging Current During Computer Use
  • Precision 0.5% Accuracy for Voltage Mode Charging
  • High Efficiency Current Mode PWM with 4A Internal Switch
  • 5% Charging Current Accuracy
  • Adjustable Undervoltage Lockout
  • Automatic Shutdown When AC Adapter is Removed
  • Low Reverse Battery Drain Current: 3µA
  • Current Sensing Can Be at Either Terminal of the Battery
  • Charging Current Soft Start
  • Shutdown Control

Typical Application

LT1511 Typical Application

Description

The LT1511 current mode PWM battery charger is the simplest, most efficient solution to fast charge modern rechargeable batteries including lithium-ion (Li-Ion), nickel-metal-hydride (NiMH) and nickel-cadmium (NiCd) that require constant-current and/or constant-voltage charging. The internal switch is capable of delivering 3A* DC current (4A peak current). Full-charging current can be programmed by resistors or a DAC to within 5%. With 0.5% reference voltage accuracy, the LT1511 meets the critical constant-voltage charging requirement for Li-Ion cells. A third control loop is provided to regulate the current drawn from the AC adapter. This allows simultaneous operation of the equipment and battery charging without overloading the adapter. Charging current is reduced to keep the adapter current within specified levels. The LT1511 can charge batteries ranging from 1V to 20V. Ground sensing of current is not required and the battery’s negative terminal can be tied directly to ground. A saturating switch running at 200kHz gives high charging efficiency and small inductor size. A blocking diode is not required between the chip and the battery because the chip goes into sleep mode and drains only 3µA when the wall adapter is unplugged.

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
LT1511CSW#PBF SW-24 SW C 05-08-1620 (SW24) Yes
LT1511CSW#TRPBF SW-24 SW C 05-08-1620 (SW24) Yes
LT1511ISW#PBF SW-24 SW I 05-08-1620 (SW24) Yes
LT1511ISW#TRPBF SW-24 SW I 05-08-1620 (SW24) Yes


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
LT1511CSW#PBF SW-24 C $7.45 $6.50 Yes
LT1511CSW#TRPBF SW-24 C $6.60 Yes
LT1511ISW#PBF SW-24 I $10.00 $8.00 Yes
LT1511ISW#TRPBF SW-24 I $8.10 Yes
Buy Now • Request Samples
* 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
DC103A LT1511 | 3A CONSTANT CURRENT/CONSTANT VOLTAGE BATTERY CHARGER $125.00
Buy Now
Click here to view our complete list of demo boards

Applications

  • Chargers for NiCd, NiMH, Lead-Acid, Lithium
  • Rechargeable Batteries
  • Switching Regulators with Precision Current Limit

People Who Viewed This Product Also Viewed

Product Notifications

Please login to your MyLinear account for notifications of datasheet updates, new document releases and LTspice model announcements for your favorite products. If you do not have a MyLinear account you may Sign Up Now.

Forgot your password? Click here.
Need help? Email mylinear@linear.com with questions and comments.

Design Tools

Linear Technology provides a variety of custom design simulation tools and device models to allow even novice designers to quickly and easily evaluate circuits using high performance switching regulators, amplifiers, data converters, filters and more. Please visit our Design Tools page to view and download:

  • LTspice - A powerful SPICE simulator, schematic capture and waveform viewer with enhancements and models for easing the simulation of switching regulators
  • LTpowerCAD - A complete power supply selection, synthesis and design tool
  • LTpowerPlay - A development environment supporting Linear Technology's Digital Power System Management (PSM) products
  • PScope & QuikEval - USB-based product demonstration and data acquisition system for use with our ADCs, DACs, and more
  • Linduino - Arduino compatible system for developing and distributing firmware libraries and example code
  • LinearLab Tools - A collection of Matlab and Python programs that provide direct access to Linear Technology’s data converter evaluation boards
  • And More!

Technical Support