SC613IMLTRT

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LED drivers are a type of power management integrated circuit (PMIC) designed to drive LED light sources. Generally, LED drivers operate with direct current (DC) and feature the ability to regulate voltage and current used to power LEDs.

The SC613IMLTRT is a PWM dimmable LED driver with a SOT23-6 package. It provides two simple circuits to build accurate, low ripple, and efficient constant current power supply for high power LEDs.

The SC613IMLTRT device utilizes a synchronous switching regulator. The switching transistors in the regulator compare the voltage across the current sense resistor connected to the output current of the LEDs to the reference voltage. This feedback loop signals the chip to modulate the output current of the LEDs.

The device includes a proprietary integrated low-dropout (LDO) voltage regulator and a fast diode replacement switch back-light dimming circuit. It employs critical conduction mode operation for the power switch, assuring a low quiescent performance, no audible noise and an adjustable peak current capability. An external resistor is used to regulate the LED current.

The SC613IMLTRT has a wide range of application fields. It is suitable for high power LED lighting, including general lighting, traffic light, and emergency lighting, as well as LCD backlights, AC/DC adapters and power supplies. It is especially suitable for application requiring accurate and low ripple current control.

The working principle of the device is based on the voltage difference between the current sense resistor and the reference voltage. The switching transistors in the synchronous switching regulator compare the voltage across the current sense resistor to the reference voltage. When the voltage difference between the two becomes larger than a certain level, the switching transistors will open, causing the current to be regulated. When the current drops below a certain level, the switching transistors will close, allowing current to flow in the opposite direction and back to the LEDs.

The device also includes a proprietary integrated low-dropout (LDO) voltage regulator and a fast diode replacement switch back-light dimming circuit. The LDO voltage regulator controls the output voltage of the device, while the fast diode replacement switch back-light dimming circuit is used to modulate the output voltage.

The SC613IMLTRT device is designed to provide efficient and accurate control of both current and voltage, making it an ideal solution for driving high power LEDs. It is ideal for applications requiring accurate, low ripple, and efficient constant current power supply.

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