LTC4008
PRODUCTION4A, High Efficiency, Multi-Chemistry Battery Charger
- Part Models
- 4
- 1ku List Price
- Starting From $6.23
Overview
- 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
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.
Applications
- Notebook Computers
- Portable Instruments
- Battery Backup Systems
Documentation
Data Sheet 1
Application Note 2
Technical Articles 2
Brochure 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LTC4008EGN#PBF | 20-Lead SSOP (Narrow 0.15 Inch) | ||
| LTC4008EGN#TRPBF | 20-Lead SSOP (Narrow 0.15 Inch) | ||
| LTC4008EGN-1#PBF | 20-Lead SSOP (Narrow 0.15 Inch) | ||
| LTC4008EGN-1#TRPBF | 20-Lead SSOP (Narrow 0.15 Inch) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Oct 3, 2024 - 24_0235 (QSOP/SSOP PKG) Migrating Bottom Trace Code Marking to Top Side Laser Marking |
||
| LTC4008EGN#PBF | PRODUCTION | |
| LTC4008EGN#TRPBF | PRODUCTION | |
| LTC4008EGN-1#PBF | PRODUCTION | |
| LTC4008EGN-1#TRPBF | PRODUCTION | |
|
Aug 10, 2022 - 22_0177 Laser Top Mark Conversion for QSOP20_24_28 Assembled in ADPG [PNG] and UTL |
||
| LTC4008EGN#PBF | PRODUCTION | |
| LTC4008EGN#TRPBF | PRODUCTION | |
| LTC4008EGN-1#PBF | PRODUCTION | |
| LTC4008EGN-1#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Battery Charger ICs 1 | ||
| LTM8061 | RECOMMENDED FOR NEW DESIGNS | 32V, 2A μModule (Power Module) Li-Ion/Polymer Battery Charger |
| Ideal Diodes and PowerPath Controllers 2 | ||
| LTC4359 | RECOMMENDED FOR NEW DESIGNS | Ideal Diode Controller with Reverse Input Protection |
| LTC2955 | RECOMMENDED FOR NEW DESIGNS | Pushbutton On/Off Controller with Automatic Turn-On |
| Overvoltage & Overcurrent Protectors 1 | ||
| LTC4365 | RECOMMENDED FOR NEW DESIGNS | Overvoltage, Undervoltage and Reverse Supply Protection Controller |