LINEAR TECHNOLOGY - 1 LTC4006 Data Sheet Manual
Summary
The LTC4006 is a high-efficiency charger controller designed for robust battery management of 2-, 3-, or 4-cell Lithium-Ion batteries. This technical solution provides complete charging capabilities, featuring programmable current limits, precise voltage accuracy, and built-in safety mechanisms like temperature sensing and deep discharge conditioning. The comprehensive manual details features ideal for engineers designing standalone chargers, portable instruments, and sophisticated battery-backup systems requiring reliable, controlled power delivery under various operating conditions.
Page 1 Text Content
LTC4006
4A, High Efficiency, Standalone Li-Ion Battery Charger FEATURES DESCRIPTIO
Complete Charger Controller for 2-, 3- or 4-Cell The LTC®4006 is a complete constant-current/constant- Lithium-Ion Batteries voltage charger controller for 2-, 3- or 4-cell lithium bat- High Conversion Efficiency: Up to 96% teries in a small package using few external components. Output Currents Exceeding 4A The PWM controller is a synchronous, quasi-constant fre- ±0.8% Accurate Preset Voltages: 8.4V, 12.6V, 16.8V quency, constant off-time architecture that will not gener-
Built-In Charge Termination with Automatic Restart ate audible noise even when using ceramic capacitors.
AC Adapter Current Limiting Maximizes Charge Rate*
The LTC4006 is available in 8.4V, 12.6V and 16.8V versions
Automatic Conditioning of Deeply Discharged
with ±0.8% voltage accuracy. Charging current is program-
Batteries
mable with a single sense resistor to ±4% typical accuracy.
Thermistor Input for Temperature Qualified Charging
Charging current can be monitored as a representative
Wide Input Voltage Range: 6V to 28V
voltage at the IMON pin. A timer, programmed by an external
0.5V Dropout Voltage; Maximum Duty Cycle: 98%
resistor, sets the total charge time or is reset to 25% of total
Programmable Charge Current: ±4% Accuracy
charge time after C/10 charging current is reached. Charg-
Indicator Outputs for Charging, C/10 Current
ing automatically resumes when the cell voltage falls below
Detection and AC Adapter Present
3.9V/cell.
Charging Current Monitor Output
Fully discharged cells are automatically trickle charged at
16-Pin Narrow SSOP Package
10% of the programmed current until the cell voltage ex- ceeds 2.5V/cell. Charging terminates if the low-battery
APPLICATIO
condition persists for more than 25% of the total charge time.
Notebook Computers Portable Instruments The LTC4006 includes a thermistor sensor input that Battery-Backup Systems suspends charging if an unsafe temperature condition is Standalone Li-Ion Chargers detected and automatically resumes charging when the
battery temperature returns to within safe limits. , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents including 5723970.
TYPICAL APPLICATIO
4A Li-Ion Battery Charger
DCIN INPUT SWITCH 0V TO 28V 3A
VLOGIC
100k DCIN INFET
LTC4006
CHG CHG CLP
TO SYSTEM LOAD
ACP ACP/SHDN CLN
CHARGING
IMON TGATE
CURRENT MONITOR 10µH 0.025Ω
NTC BGATE BATTERY
0.0047µF RT PGND 20µF
THERMISTOR ITH CSP
TIMING 6k GND BAT
0.47µF RESISTOR (~2 HOURS) 0.12µF 4006 TA01
4006fa
Page Summary Contents For LINEAR TECHNOLOGY - 1 LTC4006 Data Sheet Manual
Manual Details
| Brand | Linear |
|---|---|
| Pages | 20 |
| File Size | 261.88 KB |
| Published | June 19, 2026 |
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Frequently Asked Questions
What number of battery cells does the LTC4006 support?
It is a complete controller for 2-, 3-, or 4-cell lithium batteries.
How does the charger handle extreme temperatures?
The LTC4006 includes a thermistor sensor input, suspending charging if unsafe temperatures are detected.
What is the required input voltage range for operation?
It supports a wide input voltage range: 6V to 28V at the I pin.
How does the device ensure accurate battery termination?
Charging terminates automatically when the cell voltage exceeds 2.5V/cell or if the low-battery condition persists for over 25% of total charge time.