ISL97682IRTZR5509

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ISL97682IRTZR5509 is a power management integrated (PMIC) LED driver developed by Renesas Electronics. This driver is capable of providing step dimming and/or pulse width modulation (PWM) dimming control for driving multiple LEDs in series or parallel configurations. This article will explore the application fields of the ISL97682IRTZR5509 and discuss its working principle.

Application Fields:

ISL97682IRTZR5509 LED driver is suitable for a wide variety of LED applications, such as automotive interior and exterior lighting, LCD backlighting, industrial, signage and billboards. It provides the flexibility and convenience to drive multiple LEDs with a single driver, reducing space requirements. This driver can also be used to power a range of LEDs with different forward voltages, and supports both step-level and PWM dimming control.

The ISL97682IRTZR5509 enables precise brightness control and minimal power dissipation for optimized efficiency. The driver has a built-in protection circuit which effectively prevents overvoltage, short-circuit, EMI and overheating in the system. Additionally, it also supports a wide input voltage range from 7.8V to 60V. All these features make the ISL97682IRTZR5509 a great choice for many types of LED applications.

Working Principle:

The ISL97682IRTZR5509 features a step-dimming and PWM dimming operating modes. In step-dimming mode, the LED current is regulated by an internal comparison of the LED terminal voltage and a precision reference voltage. In PWM dimming mode, the LED current is regulated by varying the duty cycle of the PWM dimming signal. This enables precise brightness control without the need for external components.

The ISL97682IRTZR5509 includes an accurate current sense amplifier, which allows users to adjust the LED current by changing the value of a resistor connected between the external current setting pin and ground. The power FETs are arranged in a half-bridge configuration which can handle higher forward current compared to the conventional non-synchronous boost, further improving power efficiency. The driver has also integrated overvoltage, short-circuit and thermal protection circuits for better safety, as well as fault reporting for more detailed diagnostics.

In conclusion, the ISL97682IRTZR5509 is a great choice for a variety of LED applications, offering precise step-dimming or PWM dimming control, accurate current sense amplifier and wide input voltage range. Its integrated protection circuits ensure better safety and reliability. All these features make the ISL97682IRTZR5509 one of the most efficient and reliable LED drivers available.

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