AS3490

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

AS3490 is a high-efficiency, cost-efficient and reliable LED driver that is widely used in many applications, such as automotive and industrial lighting, as well as general lighting applications. The AS3490 is a switching mode, pulse width modulation (PWM) controller with a programmable current-source driver that can directly drive a variety of LEDs with very low current measurement errors. This makes the AS3490 the perfect choice for applications which require reliable and accurate control of precise LED current.

The AS3490 operates with a wide range of input supply voltages (3V to 60V) and provides excellent output current regulation and power efficiency. Its built-in over-voltage and over-current protection makes it a reliable and robust solution for challenging environments. The AS3490 has an integrated temperature sensing and monitoring system, which can be used to monitor the temperature of the LEDs so that the system can be adjusted to ensure safe operation within the thermal limits of the LEDs.

The AS3490’s operating principle is well-suited for LED driver applications. It is based on a hysteretic-mode PWM scheme that produces a digitally controlled square wave voltage output. The maximum current is preset by an external resistor and the duty cycle of the pulse width modulated signal is adjusted based on the sensed current. As the duty cycle is adjusted, the LED current is precisely regulated in a very efficient manner.

The AS3490 also features a selectable dynamic brake control with high side current-sense options. The dynamic brake control is used to reduce the inductor current when the LED currents increase too high. This helps protect the LEDs by preventing them from being overdriven by large supply voltage transients that might occur. The high side current-sense options can be used to sense the LED currents in order to accurately measure and limit them when needed.

Another feature of the AS3490 is its programmability. It has four different levels of programming to provide maximum flexibility in terms of feature selection and configuration. These levels include the basic parameters such as the current-sense resistor value and the maximum LED current, as well as more advanced parameters such as the slew rate, output on-time, maximum operating temperature and switching frequency.

In conclusion, the AS3490 is a highly efficient, reliable and cost-efficient LED driver that can be used in various applications. Its sophisticated design and integrated features make it a great choice for automotive, industrial and general lighting applications. Its programmability further allows users to make the most of their application requirements. With its robust protection features, the AS3490 is a safe and reliable choice for any LED driver needs.

The specific data is subject to PDF, and the above content is for reference