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LTC4008 Datasheet

LTC4008 Datasheet

4A, High Efficiency, Multi-Chemistry Battery Charger
Part No.: LTC4008
Page: 24 Pages
Size: 203 KB
Manufacturer: Linear Technology
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Views: 1
Update Time: 2023-11-02 11:40:42
DataSheet: Download

LTC4008 Datasheet Applicable Part

Part No. Packing SPQ Marking MSL Pins Temp Range Package Description Buy
LTC4008EGN#PBF Tube 55 LTC4008EGN 1 20 -40°C ~ 125°C 20-Lead Narrow Plastic SSOP  
LTC4008EGN#TRPBF Reel 2500 LTC4008EGN 1 20 -40°C ~ 125°C 20-Lead Narrow Plastic SSOP  
LTC4008EGN#TRMPBF Reel 500 LTC4008EGN 1 20 -40°C ~ 125°C 20-Lead Narrow Plastic SSOP  
LTC4008EGN-1#PBF Tube 55 LTC4008EGN-1 1 20 -40°C ~ 125°C 20-Lead Narrow Plastic SSOP  
LTC4008EGN-1#TRPBF Reel 2500 LTC4008EGN-1 1 20 -40°C ~ 125°C 20-Lead Narrow Plastic SSOP  
LTC4008EGN-1#TRMPBF Reel 500 LTC4008EGN-1 1 20 -40°C ~ 125°C 20-Lead Narrow Plastic SSOP  
SPQ:Standard Pack Quantity;MSL:Moisture Sensitivity Level

LTC4008 Datasheet(PDF)

LTC4008 Datasheet(Picture)

LTC4008 Features

  • 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

LTC4008 Applications

  • Notebook Computers
  • Portable Instruments
  • Battery Backup Systems

LTC4008 Description

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.

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