Meeting the demanding requirements of next-generation power banks
Shorten and accelerate time to market

ON Semiconductor has launched a highly integrated single-chip power bank solution for the development of next-generation lithium-ion battery power products.

The LC709501F total lithium-ion battery solution provides a maximum charge/discharge capacity of up to 30 watts (W) through simple FET selection, as well as a wide power and voltage/current output operating range of 5V, 9V, and 12V.

The LC709501F identifies the type of device connected and selects the fastest available charging method. Experienced design engineers can reprogram the LC709501F to support customized charge/discharge profiles and USB Type-C, PD 'Policy Engine' features.

This single-chip solution includes integrated fuel system functions, configurable I/O, an LED driver, an I2C interface, and a pre-driver for external power MOSFETs that provides system flexibility. The design reference kit enables rapid time-to-market. The LC709501F supports various output powers up to 30W through external MOSFET changes and also has a built-in integrated USB 2.0 power host controller.

The USB host controller of the LC709501F is also compatible with iOS and Android apps that communicate with a connected smartphone and use the device's display to show information related to battery status and charging process (charging time, battery life, number of completed charging cycles, etc.).

This device operates with trademarked charging protocols (e.g., Fast Charge and Qualcomm® Quick Charge™) used by smartphone manufacturers to accelerate charging times. To ensure continuous operation, it includes overcurrent, overvoltage, and unnecessary battery protection mechanisms, as well as a thermistor for temperature monitoring. The LC709501F supports operating temperatures from -40 °C to +85 °C.

Matthew Tyler, Director of Strategy and Product Roadmap Certification for ON Semiconductor’s Digital and DC-DC division, stated, “As the need to continuously recharge portable electronic devices increases, power banks are certain to become more widespread in the coming years,” and emphasized, “Power bank capacities are particularly increasing as accurate and reliable charge capability indicators and support for the latest quick charging standards become standard requirements.”

According to him, as the level of precision that the power bank must provide increases, the battery is charged at the fastest possible speed and inconvenience is minimized. This top-of-the-line LC709501F charger enables a compact yet feature-rich, high-efficiency power bank, thereby shortening and accelerating the time-to-market for next-generation power bank solutions. This versatility enhances the user experience while maintaining a high level of safety.