LTC4007-1
Analog Devices
- Darmowa próbka
- Kod:
- LTC4007-1
- Producent:
- ANALOG DEVICES
- Dodany do bazy:
- Ostatnio widziany:
Sugerowane produkty dla ltc40071
4A, High Efficiency, Li-Ion Battery Charger
* Charger Controller for 3- or 4-Cell Lithium-Ion Batteries
* High Conversion Efficiency: Up to 96%
* Output Currents Exceeding 4A
* ±0.8% Charging Voltage Accuracy
* Built-In Charge Termination for Li-Ion Batteries
* AC Adapter Current Limiting Maximizes Charge Rate
* 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, AC Adapter Present, Low Battery, Input Current Limiting and Faults
* Charging Current Monitor Output
* Available in a 24-Pin 4mm × 5mm QFN Package
The LTC4007-1 is a constant-current/constant-voltage charger controller for 3- or 4-cell lithium-ion batteries. 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 to ±4% accuracy using a programming resistor. Charging current can also be monitored as a voltage across the programming resistor. The output float voltage is pin programmed for cell count (3 cells or 4 cells) and chemistry (4.2V/4.1V). A timer, programmed by an external resistor, sets the total charge time. The LTC4007-1 includes a thermistor input, which suspends charging if an unsafe temperature condition is detected. If the cell voltage is less than 3.25V, a low-battery indicator asserts and can be used to program a trickle charge current to safely charge depleted batteries. The FAULT pin is also asserted and charging terminates if the low-battery condition persists for more than 1/4 of the total charge time.
LTC4007
LTC4007-1
Low battery threshold 4.2V cell
2.5V
3.25V
Low battery threshold 4.1V cell
2.44V
3.173V
Restart
Enabled
Disabled
Package
SSOP-24
QFN-24
Applications
* Notebook Computers
* Portable Instruments
* Battery-Backup Systems
* Li-Ion Chargers
Elecena nie prowadzi sprzedaży elementów elektronicznych, ani w niej nie pośredniczy.
Produkt pochodzi z oferty sklepu Analog Devices