Torex battery charger ICs use constant-voltage (CV) and constant-current (CC) charging methods for 1-cell Li-ion batteries and Li-polymer batteries. Charging cycles are carried out in the sequence of an initial trickle charging mode followed by a main charging mode.
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.
The line-up also includes products that can be set with a charging current of 5mA, which is ideal for small, low capacity lithium batteries in equipment such as wearable devices.
The XC6803/04/08 are Constant-Voltage (CV) and Constant-Current (CC) type charging IC for linear charging of single-cell Li-ion and Li-polymer batteries.
An LED can be connected to the charge status output pin to allow confirmation of charging by LED illumination. The IC are housed in small USP-6EL and USP-6B07 packages with excellent thermal characteristics. A charge circuit can be configured using a minimum number of external components.The XC6808 is available in an ultra-low profile USP-6B07 package measuring 2.0 x 1.8 x 0.33mm making these our thinnest battery chargers yet. In addition, with the XC6808, when the input supply is removed, the XC6808 automatically enters a low battery sink state, reducing the battery sink current to only 0.1uA (typ.), helping to ensure a long life for smaller batteries.
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.
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.
|Operating Voltage Range||4.5V~6.0V||4.5V~6.0V||4.5V~6.0V|
|CC Charge Current||40mA ~ 280mA||200mA ~ 800mA||5mA ~ 40mA|
|CV Charge Voltage||4.2V||4.2V, 4.35V, 4.4V Fixed|
|BAT Pin Reverse Current||0.5µA||4.5µA||0.1µA|
|Trickle Charge Mode||Yes||Yes||Optional|
|Battery Temperature Monitor||JEITA||JEITA (Opt)||JEITA (Opt)|
|Reverse Current Protection||Yes||Yes||Yes|
|Smallest Package Dimensons (mm)||2.0 x 1.8 x 0.4||2.0 x 1.8 x 0.4||1.8 x 2.0 x 0.33|