Battery Chargers
LI-ION / LI-PO BATTERY CHARGERS
XC6803/04/05 Single Cell Li-Ion / Li-Polymer Charger IC
The XC6803/04/05 are ConstantVoltage (CV) and Constant-Current (CC) type charging IC for linear charging of single-cell Li-ion and Li-polymer batteries. The basic charging cycle consists of trickle charge mode followed by main charge mode
An LED can be connected to the charge status output pin to allow confirmation of charging by LED illumination. The IC is housed in the small USP-6EL package with high heat dissipation, and a charge circuit can be configured using a minimum of external components. These IC also support temperature control based on JEITA, making it possible to safely charge Li-ion batteries by controlling the CV charge voltage and CC charge current according to the temperature.
KEY FEATURES
| SERIES | XC6803 | XC6804 | XC6805 | |
|---|---|---|---|---|
| Input Voltage | 4.5V ~ 6.0V | |||
| Charge Current (Externally Set) | 40mA ~ 280mA | 200mA ~ 800mA | 5mA ~ 40mA | |
| Charge Termination Voltage | 4.2V | |||
| Trickle Charge Voltage | 2.9V | |||
| Supply Current (Stand-by) | 50μA | |||
| Charge Judgment Function | ||||
| Trickle Charge Mode | YES | YES | OPTIONAL | |
| Recharge Function | OPTIONAL | OPTIONAL | YES | |
| Battery Temperature Monitor | YES | YES | OPTIONAL | |
| Protection Circuits | ||||
| Thermal Shutdown | YES | YES | YES | |
| Dropout Voltage Monitoring | YES | YES | YES | |
|
Charging Over-Voltage and Over-Current Monitoring |
YES | YES | YES | |
| Safety Timer Function | Main Charge | 5hrs | 10hrs | 3hrs |
| Trickle Charge | 0.5hrs | 2hrs | 0.5hrs | |
| Packages | USP-6EL | USP-6EL, SOP-8FD | USP-6EL | |
XC6803/04/05 TYPICAL APPLICATION CIRCUIT
Li-ion battery temperature monitoring function
The IC monitors the Li-ion battery temperature during charging by means of an NTC Thermistor connected to the THIN pin. CC charging and CV charging are controlled based on the Li-ion battery temperature as shown below to enable safe charging.
XC6805xxB TYPICAL APPLICATION CIRCUIT
Optimised for Small Batteries
To fit very small batteries, the minimum value of trickle charge current and charge completion current is 0.5mA. This ensures safer charging and longer battery life for small mobile equipment.
