BD8108FM-E2

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PMIC - LED drivers, like BD8108FM-E2, are designed for controlling LED light emitting. It can ensure good performance of the LED application with its powerful functions and special architectural design. It utilizes the I2C control protocol to modulate the electrical performance and to maintain the accurate output current. This article elaborates on its application field and working principle.

Application Field

The BD8108FM-E2 is mainly used in the application fields such as stationery, home appliances, consumer electronics, portable accessories, and office automation.

For stationery application field, propelling pencils, roller pencils and so on which used DC motor as the driving force to move the lead could benefit from this component, since it utilizes FET as the regulation transistor, that could help to finely regulate the motor speed as well as providing protection.

Also, in the appliance application field, it can be used in the air conditioners, air purifiers, and small household electrical appliances, since the FET behavior which can perform the switch on-off action can highly reduce the consumption of electrical power.

In the consumer electronics field, the component is widely used in electronic dictionary, electronic notebook and tablet, since these devices usually need a cyclic power supply, which helps to extend battery life.

In addition, in portable accessories, smartphones, tablets, bluetooth speakers, and GPS navigators, need a real time power supply to maintain their working performance, and the component can supply constant output current to ensure the accuracy.

Lastly, in office automation, optical products, printers, copiers, cash registers, and machines could benefit from this component, because the adjustable FET gate voltage can precisely control the output current.

Working Principle

The BD8108FM-E2 IC is an integrated circuit with a specific purpose. It is specially designed for LED light emitting. It has an adjustable current limitation circuit, which can sense and limit the output current accurately and rapidly without impairing brightness of the LED, to ensure a better performance of the system

This component utilizes I2C control protocol, which supports up to 400KHz high speed data transmission, to allow communication within the devices. The I2C interface could also be connected to various kinds of external control inputs, so that the output current could be adjusted by the remote control.

Furthermore, the component utilizes FETs as the regulation transistor, that could expand or reduce the source or drain path to fine-tune the output current. The FETs are connected between the output and the integrated reference current so that the output current could be regulated by the FET gate voltage.

Apart from that, the component has a cycle by cycle over current protection circuit and a built-in thermal protection circuit, that could protect the chip from being damaged from any potential over current or heat. Therefore, it can guarantee the stability and safety of the system.

Conclusion

To sum up, the BD8108FM-E2 is a very practical LED driver intended for LED light emitting in the application fields of stationery, home appliances, consumer electronic, portable accessories, and office automation. It utilizes I2C control protocol and FETs as the regulation transistor to supply accurate output current and to protect the chip from any potential damages. This component is easy to control and provide excellent performance.

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