Datasheet LTC4006 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | 4A, High Efficiency, Standalone Li-Ion Battery Charger |
| Pages / Page | 20 / 1 — FEATURES. DESCRIPTIO. Complete Charger Controller for 2-, 3- or 4-Cell. … |
| File Format / Size | PDF / 273 Kb |
| Document Language | English |
FEATURES. DESCRIPTIO. Complete Charger Controller for 2-, 3- or 4-Cell. Lithium-Ion Batteries
Model Line for this Datasheet
Text Version of Document
LTC4006 4A, High Efficiency, Standalone Li-Ion
U
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 ■ 16-Pin Narrow SSOP Package Fully discharged cells are automatically trickle charged at 10% of the programmed current until the cell voltage ex-
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ceeds 2.5V/cell. Charging terminates if the low-battery
APPLICATIO S
condition persists for more than 25% of the total charge ■ Notebook Computers time. ■ 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.
U TYPICAL APPLICATIO 4A Li-Ion Battery Charger
DCIN INPUT SWITCH 0V TO 28V 3A 0.1µF 5k VLOGIC 100k DCIN INFET 15nF 0.033Ω LTC4006 CHG CHG CLP TO SYSTEM LOAD ACP ACP/SHDN CLN 20µF CHARGING I TGATE CURRENT MONITOR MON 32.4k 10µH 0.025Ω NTC BGATE BATTERY 0.0047µF RT PGND 20µF THERMISTOR ITH CSP 10k 309k NTC TIMING 6k GND BAT RESISTOR 0.47µF (~2 HOURS) 0.12µF 4006 TA01 4006fa 1
U
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 ■ 16-Pin Narrow SSOP Package Fully discharged cells are automatically trickle charged at 10% of the programmed current until the cell voltage ex-
U
ceeds 2.5V/cell. Charging terminates if the low-battery
APPLICATIO S
condition persists for more than 25% of the total charge ■ Notebook Computers time. ■ 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.
U TYPICAL APPLICATIO 4A Li-Ion Battery Charger
DCIN INPUT SWITCH 0V TO 28V 3A 0.1µF 5k VLOGIC 100k DCIN INFET 15nF 0.033Ω LTC4006 CHG CHG CLP TO SYSTEM LOAD ACP ACP/SHDN CLN 20µF CHARGING I TGATE CURRENT MONITOR MON 32.4k 10µH 0.025Ω NTC BGATE BATTERY 0.0047µF RT PGND 20µF THERMISTOR ITH CSP 10k 309k NTC TIMING 6k GND BAT RESISTOR 0.47µF (~2 HOURS) 0.12µF 4006 TA01 4006fa 1
