SC4538ULTRT

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SC4538ULTRT is a PMIC – LED Drivers designed to provide high precision dimming and enhanced switching frequency in HV LED lighting systems. The integrated control and power stages of this device make it suitable for dynamic applications in low-power LED lamps. The device supports a wide range of LED forward voltages, up to 80V. The wide input voltage range of 18-60V makes it easy to use with different HV LED system designs.

The main features of SC4538ULTRT are high precision dimming and enhanced switching frequency. The device has an adjustable PWM dimming frequency ranging from 200 to 5kHz. It also supports an adjustable pulse width modulation with an output range from 0-100%. This supports better lighting effects and improves the performance of the LED lamps. The device also has various protection features that include short circuit, overvoltage, undervoltage, over temperature, and ESD protection.

The working principle of SC4538ULTRT is based on the current regulator topology. The input voltage is stepped down to a level that is suitable to drive the LEDs. The output current is regulated through the feedback network, which adjusts the duty cycle of the Pulse Width Modulation (PWM) switch. The output current is then regulated to a safe value, to prevent any damage to the LEDs. The device also provides a dimming capability to adjust the brightness of LEDs.

The main application of SC4538ULTRT is LED lighting in high-voltage LED systems. The device can be used to drive various LED configurations such as single, multiple, and parallel LED strings. It can also be used for dimming applications in LED TV backlighting and LED signage. The device is also suitable for automotive lighting, residential lighting, and industrial lighting applications.

In conclusion, SC4538ULTRT is a great device for high precision dimming and enhanced switching frequency in HV LED lighting systems. The wide input voltage and output current range make it suitable for a wide range of applications. It provides high efficiency and stable operation, which is ideal for dynamic applications. The integrated protection features and adjustable dimming frequency make it a reliable solution for many lighting systems.

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