LTC4006 - 4A, High Efficiency, Standalone Li-Ion Battery Charger

Features

  • Click Here For the LTC4006 Evaluation Kit
  • Complete Charger Controller for 2-, 3- or 4-Cell Lithium-Ion Batteries
  • High Conversion Efficiency: Up to 96%
  • Output Currents Exceeding 4A
  • ±0.8% Accurate Preset Voltages: 8.4V, 12.6V, 16.8V
  • Built-In Charge Termination with Automatic Restart
  • AC Adapter Current Limiting Maximizes Charge Rate*
  • Automatic Conditioning of Deeply Discharged Batteries
  • Thermistor Input for Temperature Qualified Charging
  • Wide Input Voltage Range: 6V to 28V
  • 0.5V Dropout Voltage; Maximum Duty Cycle: 98%
  • Programmable Charge Current: ±4% Accuracy
  • Indicator Outputs for Charging, C/10 Current Detection and AC Adapter Present
  • Charging Current Monitor Output
  • 16-Pin Narrow SSOP Package

Typical Application

LTC4006
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Description

The LTC4006 is a complete constant-current/constant voltage charger controller for 2-, 3- or 4-cell lithium batteries in a small package using few external components. The PWM controller is a synchronous, quasi-constant frequency, constant off-time architecture that will not generate audible noise even when using ceramic capacitors.

The LTC4006 is available in 8.4V, 12.6V and 16.8V versions with ±0.8% voltage accuracy. Charging current is programmable with a single sense resistor to ±4% typical accuracy. Charging current can be monitored as a representative voltage at the IMON pin. A timer, programmed by an external resistor, sets the total charge time or is reset to 25% of total charge time after C/10 charging current is reached. Charging automatically resumes when the cell voltage falls below 3.9V/cell.

Fully discharged cells are automatically trickle charged at 10% of the programmed current until the cell voltage exceeds 2.5V/cell. Charging terminates if the low-battery condition persists for more than 25% of the total charge time.

The LTC4006 includes a thermistor sensor input that suspends charging if an unsafe temperature condition is detected and automatically resumes charging when the battery temperature returns to within safe limits.

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Packaging

SSOP-16

LTC4006
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Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LTC4006EGN-2 SSOP 16 E $5.09 $3.60 View
LTC4006EGN-2#PBF SSOP 16 E $5.09 $3.60 View
LTC4006EGN-2#TR SSOP 16 E   $3.66 View
LTC4006EGN-2#TRPBF SSOP 16 E   $3.66 View
LTC4006EGN-4 SSOP 16 E $5.09 $3.60 View
LTC4006EGN-4#PBF SSOP 16 E $5.09 $3.60 View
LTC4006EGN-4#TR SSOP 16 E   $3.66 View
LTC4006EGN-4#TRPBF SSOP 16 E   $3.66 View
LTC4006EGN-6 SSOP 16 E $5.09 $3.60 View
LTC4006EGN-6#PBF SSOP 16 E $5.09 $3.60 View
LTC4006EGN-6#TR SSOP 16 E   $3.66 View
LTC4006EGN-6#TRPBF SSOP 16 E   $3.66 View
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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.

Evaluation Kits

Part Number Description Price
DC495A LTC4006EGN-6 | 8.4V/2A Li-Ion Battery Charger, DCIN = 15-20V @ 2A, BAT OUT = 8.4V @ 2A $125.00
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Applications

  • Notebook Computers
  • Portable Instruments
  • Battery-Backup Systems
  • Standalone Li-Ion Chargers
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Simulate

To simulate selected Linear Technology products, please download LTSpice / SwitcherCAD III. This powerful schematic capture and simulation tool includes macro models for 80% of Linear Technology's switching regulators, over 200 op amp models, as well as resistors, transistors and MOSFET models.

For other simulation tools, visit our Design Simulation and Device Models page.

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