RT8575GQW Application Field and Working Principle
RT8575GQW is a power management IC (PMIC) designed for LED drivers. It is part of the RT8575G family of PMICs from Richtek Technology, a leading global supplier of semiconductor ICs. This IC is capable of delivering up to 2.7V and 540mA of driving current for high-power LEDs. Furthermore, it can detect overvoltage and undervoltage, making it a reliable PMIC for lighting applications.
The RT8575GQW is an integrated 3-channel white LED driver. It can control up to three strings of series-connected LEDs in the following configurations: constant current + single-channel (CC+1ch), constant current + double-channel (CC+2ch), and constant current + triple-channel (CC+3ch). It offers a wide range of output current options, including up to 25mA, 50mA, and 100mA per string.
The RT8575GQW supports adjustable LED string current and works with external voltage and PWM dimming. It operates within an input voltage range of 8.3V to 25.5V, and can be configured to provide either a linear current control or a programmable current profile.
The RT8575GQW also features a wide variety of protection and safety functions. It offers overvoltage protection (OVP), undervoltage protection (UVP), over-temperature protection (OTP), and LED open/short detection. Additionally, it features an LED string fault detector with an output current selectable between 10mA and 800mA.
In terms of performance, the RT8575GQW provides a high efficiency of up to 90%. In addition, it is equipped with spread spectrum and frequency modulation functions to reduce the electromagnetic interference (EMI).
In conclusion, the RT8575GQW is a reliable and efficient PMIC designed to meet the needs of lighting applications. Its wide range of features, protections, and safety functions make it suitable for both indoor and outdoor lighting applications.