AS1109-QF_EK_ST

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The AS1109-QF/EK/ST application field is mainly used in LED lighting, for example, in automotive headlights, in desktop monitors and televisions, in railway and street lighting, and in architectural and industrial lighting. This application field implements advanced technologies to provide efficient, long-lasting lighting, using low-voltage, high-efficiency LED drivers. Specifically, the AS1109-QF and AS1109-EK provide advantages of high safety, high efficiency, low EMC and low cost. At the same time, they can provide solutions for high brightness LED lighting, with the added capability of dimming LED devices. The AS1109-ST, on the other hand, is designed to provide a \'soft start\' for LED lighting devices by gradually reducing inrush current and improving life expectancy.

The working principle of these LED drivers is based on a high and low side control, with adjustable current regulation. The AS1109-QF and AS1109-EK both have a PWM or linear current control, while the AS1109-ST uses a \'soft start\' current control. The AS1109-QF and AS1109-EK have a built-in current setting resistor, while the AS1109-ST has an external one. In order to improve the efficiency of the LED lighting and extend its life, the AS1109-QF and AS1109-EK have features such as overtemperature protection, short circuit protection, and an overcurrent protection in the output stage. The AS1109-ST also has a low jitter and dead time adjustment, which can increase the life-time of the LED device.

In order to suit the needs of different applications, the AS1109-QF/EK/ST can be used with different DC input voltages, such as 12V, 36V, 48V, etc. It can also be used in a wide range of ambient temperatures from -40°C to +85°C. Additionally, the AS1109-QF/EK/ST can provide a wide output voltage range, ranging from 0.45V to 28V, with a maximum output current of up to 6A. The current control is also adjustable, with a control accuracy of ±1%.

The AS1109-QF/EK/ST LED drivers are suitable for a wide range of LED lighting applications. They are designed with features such as current control, dimming capability, overvoltage protection, and low EMC, making them the perfect solution for low-voltage, high-efficiency LED lighting. With their wide voltage and current range, they are suitable for applications from automotive headlights, to desktop monitors and televisions, to railway and street lighting, and even to architectural and industrial lighting. Furthermore, the AS1109-ST ensures a \'soft start\' for LED lighting applications, reducing inrush current and improving its life expectancy.

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