Li-ion, intelligent charge controller for next-generation power banks

October 20, 2016 // By Graham Prophet
ON Semiconductor has introduced a highly integrated single chip power bank charge controller for the development of next generation Li-Ion powered products. The LC709501F provides broad power and voltage/current output range of 5V, 9V and 12V operation, with a maximum charge/discharge capability of up to 30W through FET selection.

The LC709501F determines what type of device is connected and automatically selects the fastest available method for charging. Advanced users can reprogram the LC709501F to support custom charge/discharge profiles, as well as USB Type-C and PD “Policy Engine” functions. This single-chip solution includes integrated fuel gauge function, configurable I/O, LED drivers, I ²C interface, and pre-drivers for external power MOSFETs. A design reference kit is available. The LC709501F supports various output power levels up to 30W, by changing external MOSFETs. In addition, there is an integrated USB 2.0 Full Speed host controller.

 

The LC709501F’s USB host controller supports connectivity with iOS and Android apps that enable the device to communicate with the connected smartphone and subsequently make use of its display to show information concerning the battery health and the charging process (charging time, battery life, number of charging cycles completed, etc.). The device works with the proprietary charging protocols (such as Fast Charge and Qualcomm's Quick Charge) now being utilized by smartphone manufacturers to accelerate the charging period. To ensure operational longevity, over-current, over-voltage, and redundant battery protection mechanisms are all included, as well as a thermistor for monitoring of temperature levels. The LC709501F supports an operational temperature range of -40 °C to +85 °C.

 

In a QFN-52 (6 x 6mm) package the part is priced at $2.80 (10,000).

 

ON Semiconductor; www.onsemi.com