AS3682

AS3682 is an advanced light emitting diode (LED) driver IC designed for white LED backlighting applications in mobile displays. The AS3682 integrates a 2 channel, DC-DC charge pump circuit and several support functions such as voltage monitoring, fault detection, thermal protection and open LED protection. The AS3682 is featured with a wide input voltage range which makes it suitable for low to high-end mobile display applications.

AS3682 LED drivers have a wide range of applications. They can be used for LED display backlighting, LED lighting and outdoor LED signs. They are highly efficient, reliable and power saving. The AS3682 is suitable for low-end mobile display applications, where a wide input voltage range is critical for a long product lifetime.

AS3682 LED drivers are based on a simple DC-DC charge pump circuit. The AS3682 IC pumps the power from a lower supply voltage to a higher output voltage. This increases the voltage to a level that is sufficient to drive the LEDs. The AS3682 has two channels, each with their own charge pump circuit and output voltage. The output voltage of each channel can be programmed individually with external resistors. The output voltage is monitored by an on-chip voltage regulator and the output current is monitored with a precision biasing network.

The AS3682 has many protection functions, such as an over-temperature protection, a fault detection system, an open LED protection circuit and a short-circuit protection. The short-circuit protection works by disabling the charge pump in the event of a short, thereby protecting the device from over-current. The open LED protection circuit monitors the electrical characteristics of the LEDs and shuts down the device in the case of a malfunction.

The AS3682 is designed for high efficiency and low power consumption. It can be used in a wide range of applications, from basic white LED backlighting to advanced colour backlighting. The AS3682 is a highly flexible and reliable device, making it an excellent choice for a wide range of LED lighting applications.