LTC4006 - 4A, High Efficiency, Standalone Li-Ion Battery Charger
Features
- 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
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.
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 |
|---|---|---|---|---|---|
| LTC4006EGN-2#PBF | SSOP-16 | GN | E | 05-08-1641 (GN16) | Yes |
| LTC4006EGN-2#TRPBF | SSOP-16 | GN | E | 05-08-1641 (GN16) | Yes |
| LTC4006EGN-4#PBF | SSOP-16 | GN | E | 05-08-1641 (GN16) | Yes |
| LTC4006EGN-4#TRPBF | SSOP-16 | GN | E | 05-08-1641 (GN16) | Yes |
| LTC4006EGN-6#PBF | SSOP-16 | GN | E | 05-08-1641 (GN16) | Yes |
| LTC4006EGN-6#TRPBF | SSOP-16 | GN | E | 05-08-1641 (GN16) | Yes |
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 | |
|---|---|---|---|---|---|---|
| LTC4006EGN-2#PBF | SSOP-16 | E | $5.09 | $3.60 | Yes | |
| LTC4006EGN-2#TRPBF | SSOP-16 | E | $3.66 | Yes | ||
| LTC4006EGN-4#PBF | SSOP-16 | E | $5.09 | $3.60 | Yes | |
| LTC4006EGN-4#TRPBF | SSOP-16 | E | $3.66 | Yes | ||
| LTC4006EGN-6#PBF | SSOP-16 | E | $5.09 | $3.60 | Yes | |
| LTC4006EGN-6#TRPBF | SSOP-16 | E | $3.66 | Yes | ||
| Buy Now • Request Samples | ||||||
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 |
|---|---|---|---|
| DC495B | LTC4006EGN-6 Demo Board | VIN = 9V to 20V, 8.4V/2A Sync Buck Li-Ion Battery Charger | $125.00 | |
| Buy Now | |||
Applications
- Notebook Computers
- Portable Instruments
- Battery-Backup Systems
- Standalone Li-Ion Chargers
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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:
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Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
