IS32LT3120-GRLA3-TR

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PMIC - LED Drivers have been developed to offer advanced solutions for voltage and current control of LED lighting systems. The IS32LT3120-GRLA3-TR is an example of such a device. This application field and working principle is discussed below.

Application Field

The IS32LT3120-GRLA3-TR is specifically designed for LED lighting applications, such as in automotive, industrial and consumer applications. It is suitable for a wide range of LED systems, including those using multiple strings of LEDs in series, parallel, mixed series-parallel, and mixed parallel-series, as well as electronic transformers, non-dimmable bulbs, and non-dimmable bulbs with dimming control. Additionally, the IS32LT3120-GRLA3-TR offers high power conversion efficiency, eliminating the need for external switches, and its low voltage ripple, low EMI and over-temperature protection make it suitable for a variety of power-sensitive systems.

Architecture

The IS32LT3120-GRLA3-TR is a linear constant voltage (CV) controller, meaning it regulates the output voltage of an LED string in order to maintain a constant brightness and current flow. The device integrates a boost controller, current sensing and compensation, and other components in the same package. The boost controller employs a pulse width modulation (PWM) technique to step up the input line and thereby achieve a constant output voltage. The output current is monitored by a current sensing circuit, and the voltage applied to the LED string is adjusted accordingly. Other features include a low standby current and a soft-start function for mitigating surge inrush current.

Protection Features

The IS32LT3120-GRLA3-TR includes several protection features to protect the LED string from damage. These include over-temperature protection, over-voltage protection, short-circuit protection, and over-current protection. Additionally, the device features a Power-Good signal, which can be used to detect when the LED string is powered correctly.

Safety and Compliance

The IS32LT3120-GRLA3-TR meets the requirements of the Automotive Safety Integrity Level (ASIL) and IEC/EN 61131-2 standards, as well as various automotive and industrial standards such as AEC Q100, UL, and CSA. Additionally, the device is RoHS compliant, making it suitable for lighting systems requiring the highest safety and compliance standards.

Conclusion

The IS32LT3120-GRLA3-TR is an ideal choice for LED systems requiring high efficiency, low ripple, and low heat. Thanks to its built-in protection features and various automotive and industrial compliance standards, it is ideal for high-power, sensitive applications. Finally, the device meets the Automotive Safety Integrity Level (ASIL) and IEC/EN 61131-2 standards, making it suitable for applications requiring the highest safety and compliance standards.

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