SC643ULTRT

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

The SC643ULTRT is an integrated special purpose analog driver circuit, specializing in low power lighting applications by driving LEDs with current sources. It is a high voltage and current Pulse Width Modulation (PWM) driver feature, with a power output capability up to 120 W. This small(TSOP-7) integrated circuit, provides a single output channel that includes a 20-V high voltage device, a PWM dimming controller, and a high speed low side MOSFET. Each of these functions integrated together eliminates the need for several external components to create a complete lighting solution.

The application field of the SC643ULTRT is primarily LED lighting circuits. LEDs offer the advantages of providing very high efficiency, long life, and directional light output. However, traditional dimming circuits are not compatible with LED lighting and this is where specialized LED drivers like the SC643ULTRT become necessary.

The working principle employed in the SC643ULTRT is based on the constant current output principle. In this principle, the current that is sent to the LED is kept constant, regardless of the input voltage or load. This keeps the LED from being overdriven and improves the life-span of the LED. The SC643ULTRT is capable of dimming the LED from 0% to100%. The operation of the circuit is based on the Association of the PWM signal from the LED pin to the output current. The duty cycle of the signal is adjusted to set and/or change the output current.

The SC643ULTRT also features a high side-PWM signal that is used to control the switching of the MOSFETs. The signal includes a pre-biased gate voltage, which is used to turn off the MOSFETs properly, thus allowing it to operate efficiently and providing a higher current output.

Overall, the SC643ULTRT is an integrated circuit that effectively drives the LEDs efficiently and provides the user with an easy and cost effective way to dim the lighting. It eliminates the need for several components and reduces time, space and cost. Furthermore, it helps improve the life-span of the LED and provides a wide range of dimming control, depending on the user\'s need.

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