ISL97683IRTZ-TK Integrated Circuits (ICs)

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The ISL97683IRTZ-TK LED driver integrated power management IC (PMIC) is a 3A LED driver for automotive and panel display applications. This device integrates a field-effect input stage, boost power stage, control logic, and output switching control with a flexible dimming interface to provide a cost-effective and reliable solution. As an LED PMIC, these features make this device a viable solution for driving LEDs in applications such as automotive, outdoor, warning, and interior lighting.This device simplifies both design and implementation by combining an optimized power stage and embedded control logic while also providing ease of implementation. This device utilizes a 4-bit SPI interface which can be used to control the LED dimming and control the LED brightness. It also provides automatic over-temperature protection, reverse battery protection and input over-voltage protection.The ISL97683IRTZ-TK LED driver PMIC has a wide input voltage range of 2.5V to 18V and is capable of driving 3 high brightness white LEDs with up to 3A output current. This device supports multiple dimming functions, such as pulse width modulation (PWM) dimming, analog dimming, and digital dimming. With the incorporation of an adjustable switching frequency, the ISL97683IRTZ-TK allows for the optimization of power conversion efficiency, EMI reduction, and audible noise elimination.The ISL97683IRTZ-TK LED driver PMIC provides a four-level dimming functionality, allowing the LEDs to be dimmed in four distinct settings. The current level to be set is determined by the output of the user’s dimming input. The device also provides a linear dimming curve that enables faster response time and more accurate control.The working principle of the ISL97683IRTZ-TK LED driver PMIC is to convert an input voltage into a required current to the LED load. This device consists of a field-effect power switch, a control logic block, an LED dimming signal control block, and an error amplifier. The field-effect power switch will act as an output switch to control the LED current. The control logic will control the device’s operation based on the user-configured settings. The LED dimming signal block converts the user’s dimming signal into a dimming current level. And the error amplifier will compare the programmed dimming signal to the sensed current and work to keep it consistent. The device will adjust its output based on the comparison of the sensed and programmed current levels. In the end, the constant current is supplied to the LED load.The ISL97683IRTZ-TK is perfect for automotive, panel display, and other applications requiring high efficiency, flexible dimming, and efficient power conversion. With its wide input voltage range and optimized switch current, it is a great cost-effective solution for these types of applications.

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