LTC4008

PRODUCTION

4A, High Efficiency, Multi-Chemistry Battery Charger

Data Sheet (Rev. C) Product Selection Table
Viewing:

Overview

  • General Purpose Charger Controller
  • High Conversion Efficiency: Up to 96%
  • Output Currents Exceeding 4A
  • ±0.8% Voltage Accuracy
  • AC Adapter Current Limiting Maximizes Charge Rate
  • Thermistor Input for Temperature Qualified Charging
  • Wide Input Voltage Range: 6V to 28V
  • Wide Output Voltage: 3V to 28V
  • 0.5V Dropout Voltage; Maximum Duty Cycle: 98%
  • Programmable Charge Current: ±4% Accuracy
  • Indicator Outputs for Charging, C/10 Current Detection, AC Adapter Present, Input Current Limiting and Faults
  • Charging Current Monitor Output
  • Available in a 20-Pin Narrow SSOP Package

The LTC4008 is a constant-current/constant-voltage charger controller. The PWM controller uses a synchronous, quasi-constant frequency, constant off-time architecture that will not generate audible noise even when using ceramic capacitors. Charging current is programmable with a sense resistor and programming resistor to ±4% typical accuracy. Charging current can be monitored as a voltage across the programming resistor. An external resistor divider and precision internal reference set the final float voltage.

The LTC4008 includes a thermistor sensor input that will suspend charging if an unsafe temperature condition is detected and will automatically resume charging when battery temperature returns to within safe limits; a FAULT pin indicates this condition. A FLAG pin indicates when charging current has decreased below 10% of the programmed current. An external sense resistor programs AC adapter current limiting. The ICL pin indicates when the charging current is being reduced by input current limiting so that the charging algorithm can adapt.

Applications

  • Notebook Computers
  • Portable Instruments
  • Battery Backup Systems
LTC4008
4A, High Efficiency, Multi-Chemistry Battery Charger
LTC4008 Application Circuit LTC4008 Pin Configuration LTC4008 Pin Configuration
Add to myAnalog

Add product to the Products section of myAnalog (to receive notifications), to an existing project or to a new project.

Create New Project
Ask a Question

Documentation

Data Sheet 1

Reliability Data 1

Application Note 2

Technical Articles 2

Learn More
Add to myAnalog

Add media to the Resources section of myAnalog, to an existing project or to a new project.

Create New Project

Software Resources

Can't find the software or driver you need?

Request a Driver/Software

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
Protection Switches & Controllers 3
LTC4365
RECOMMENDED FOR NEW DESIGNS Overvoltage, Undervoltage and Reverse Supply Protection Controller
LTC4359
RECOMMENDED FOR NEW DESIGNS Ideal Diode Controller with Reverse Input Protection
LTC2955
RECOMMENDED FOR NEW DESIGNS Pushbutton On/Off Controller with Automatic Turn-On
Modal heading
Add to myAnalog

Add product to the Products section of myAnalog (to receive notifications), to an existing project or to a new project.

Create New Project

Latest Discussions

26 Weeks Ago
Capacitor calculations
2 Years Ago
LTC4008 no-load/light load loss
2 Years Ago
LTC4008 recharging withour FLAG clear.
View related discussion on EngineerZone®

Recently Viewed