LTC1960 - Dual Battery Charger/ Selector with SPI Interface

Features

  • Complete Dual-Battery Charger/Selector System
  • Serial SPI Interface Allows External µC Control and Monitoring
  • Simultaneous Dual-Battery Discharge Extends Run Time by Typically 10%
  • Simultaneous Dual-Battery Charging Reduces Charging Time by Up to 50%
  • Automatic PowerPathTM Switching in <10µs Prevents Power Interruption
  • Circuit Breaker Protects Against Overcurrent Faults
  • 5% Accurate Adapter Current Limit Maximizes Charging Rate
  • 95% Efficient Synchronous Buck Charger
  • Charger Has Low 0.5V Dropout Voltage
  • No Audible Noise Generation, Even with Ceramic Capacitors
  • 11-Bit VDAC Delivers 0.8% Voltage Accuracy
  • 10-Bit IDAC Delivers 5% Current Accuracy
  • VIN Up to 32V; VBATT Up to 28V
  • Available in 5mm × 7mm 38-Pin QFN and 36-Pin Narrow SSOP Packages

Typical Application

LTC1960 Typical Application
LTC1960 Typical Application

Description

The LTC1960 is a highly-integrated battery charger and selector intended for portable products using dual smart batteries. A serial SPI interface allows an external microcontroller to control and monitor status of both batteries.

A proprietary PowerPath architecture supports simultaneous charging or discharging of both batteries. Typical battery run times are extended by 10%, while charging times are reduced by up to 50%. The LTC1960 automatically switches between power sources in less than 10µs to prevent power interruption upon battery or wall adapter removal.

The synchronous buck battery charger delivers 95% efficiency with only 0.5V dropout voltage, and prevents audible noise in all operating modes. Patented* input current limiting with 5% accuracy charges batteries in the shortest possible time without overloading the wall adapter.

The LTC1960’s 5mm × 7mm 38-pin QFN and 36-pin narrow SSOP packages allow implementation of a complete SBS-compliant dual battery system while consuming minimum PCB area.

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
LTC1960CG#PBF SSOP-36 G C 05-08-1640 (G36) Yes
LTC1960CG#TRPBF SSOP-36 G C 05-08-1640 (G36) Yes
LTC1960CUHF#PBF 5x7 QFN-38 UHF C 05-08-1701 Yes
LTC1960CUHF#TRPBF 5x7 QFN-38 UHF C 05-08-1701 Yes


LTC1960 Package Drawing
LTC1960 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
LTC1960CG#PBF SSOP-36 C $8.22 $6.95 Yes
LTC1960CG#TRPBF SSOP-36 C $7.05 Yes
LTC1960CUHF#PBF 5x7 QFN-38 C $7.97 $6.70 Yes
LTC1960CUHF#TRPBF 5x7 QFN-38 C $6.76 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
DC1904A LTC1960CD Demo Board I Universal Dual-Battery Charger/Selector $325.00
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Companion Boards

Part Number Description Price Documentation
DC1223A-B USB to SM-Bus/SPI Interface with Monitor $400.00
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Click here to view our complete list of demo boards

Applications

  • Portable Computers
  • Portable Instruments

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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