LTC4009

PRODUCTION

High Efficiency, Multi-Chemistry Battery Charger

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Part Details

  • General Purpose Battery Charger Controller
  • Efficient 550kHz Synchronous Buck PWM Topology
  • ±0.5% Output Float Voltage Accuracy
  • Programmable Charge Current: 4% Accuracy
  • Programmable AC Adapter Current Limit: 3% Accuracy
  • No Audible Noise with Ceramic Capacitors
  • Wide Input Voltage Range: 6V to 28V
  • Wide Output Voltage Range: 2V to 28V
  • Indicator Outputs for AC Adapter Present, Charging, C/10 Current Detection and Input Current Limiting
  • Analog Charge Current Monitor
  • Micropower Shutdown
  • Thermally Enhanced 20-Pin 4mm × 4mm × 0.75mm QFN Package
LTC4009
High Efficiency, Multi-Chemistry Battery Charger
Efficiency at DCIN = 20V Product Package 1 Product Package 2
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 2

Application Note 1

Technical Articles 1

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Battery Charger ICs 1
LTM8061
RECOMMENDED FOR NEW DESIGNS 32V, 2A μModule (Power Module) Li-Ion/Polymer Battery Charger
Battery Monitors & Fuel Gauges 1
LTC2943
PRODUCTION Multicell Battery Gas Gauge with Temperature, Voltage and Current Measurement
Protection Switches & Controllers 3
LTC4365
RECOMMENDED FOR NEW DESIGNS Overvoltage, Undervoltage and Reverse Supply Protection Controller
LTC2955
RECOMMENDED FOR NEW DESIGNS Pushbutton On/Off Controller with Automatic Turn-On
LTC4417
RECOMMENDED FOR NEW DESIGNS Prioritized PowerPath™ Controller
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Tools & Simulations

LTspice 1

Models for the following parts are available in LTspice:

  • LTC4009
  • LTC4009-1
  • LTC4009-2
LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

eval board
schematic 1
DC1104B

LTC4009-2 Multicell Li-Ion Battery Charger Board

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Product Details

Demonstration circuit 1104B is a single-battery standalone charge controller with built-in charge termination featuring the LTC4009-2. The input voltage is 13.5V to 20V. The charger output voltage is programmed by jumpers to support 1-, 2-, 3- and 4-cell Li-Ion batteries with a cell voltage of 4.2V/cell. The maximum charge current is 2A. The demo board is initially configured for 12.6V Li-Ion batteries. The board will automatically charge a battery as soon as input power is applied with a battery connected prior to power up. Status LEDs are provided for CHG, ACP, C/10, and ICL although this charger is not a smart battery charger, a popular smart battery connector is provided that can be used for data-logging with the optional DC410 demo board and software. To be clear, you do not need a smart battery to use this board. The optional DC410 SMBus-to-Serial port adapter and associated software is to monitor a smart battery for demonstration purposes only. Contact your Analog Devices representative for ordering a DC410. This demo board is capable of supporting the LTC4009 and LTC4009-1 with a simple IC swap out. See schematic.


 

 
DC1104B
LTC4009-2 Multicell Li-Ion Battery Charger Board
DC1104B

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