ISL97691IRTZ-T

ISL97691IRTZ-T is an intelligent power management integrated circuit (IPM) for driving LEDs. This four-channel constant current LED driver is uniquely optimized for single-digit or four-digit applications, making it the perfect solution for outdoor and industrial applications where the environment can be highly variable. The ISL97691IRTZ-T drives up to five strings of four LEDs at up to 1A per channel with a wide range of forward voltage levels, from as low as 0.5V to as high as 3.2V. This makes it ideal for driving single-digit or multi-digit displays in a wide range of applications, such as large and small industrial signage, outdoor lighting, and automotive displays.

The ISL97691IRTZ-T is designed with a built-in multiple string current equalizer and adjustable refresh rate that offer superior performance. It operates with an input voltage range of 4.5V to 32V, providing an overall power savings to the system. The ISL97691IRTZ-T also features an intelligent auto-dimming control algorithm and high-side voltage sense regulator that lower the power consumption when the brightness of the LED is not required. The device also supports pulse width modulation (PWM) dimming, allowing the user to adjust the LED brightness from a PWM signal.

The ISL97691IRTZ-T is built to operate reliably in extreme temperatures and humidity conditions. It includes a thermal shutdown protection to safeguard against shorts or overtemperatures and has an ESD rating of ±2kV (HBM). It also includes active current offset, which helps ensure that the LEDs are not subjected to excessive current stress. The device is available in a 16-pin 3.2mm x 3.2mm QFN package and is lead free and RoHS-compliant.

The ISL97691IRTZ-T provides a single-chip solution for lighting applications. It features two integrated, low-noise DC-DC converters that provide up to 1A of output current while maintaining low standby power consumption and low component count. The first DC-DC converter is designed to provide constant current to drive one to four LEDs per channel while the second converter is designed to provide a voltage reference to the LED channels. The constant current regulation ensures that the LED current is maintained constant, even with variations in line voltage, temperature, and component tolerances.

The ISL97691IRTZ-T has an integrated LED current equalizer that helps maintain a balanced LED current for flicker free operation. It includes braking functions for smooth lighting transitions and an adjustable refresh rate circuit for variable LED brightness control. The ISL97691IRTZ-T also includes a GPIO which can be used for dimming control and multiple I2C Slave protocol for digital control of the power management functions.

In conclusion, the ISL97691IRTZ-T provides a single-chip solution for LED driving applications. It offers a wide range of operating conditions, from 4.5V to 32V, that allows it to be used in a variety of LED applications and the built-in current equalizer, active current offset and adjustable refresh rate circuits ensure that the LED light is maintained with excellent quality and efficiency. The GPIO and multiple I2C Slave protocol allow users to control their LED applications with ease, making the ISL97691IRTZ-T the ideal choice for a range of industrial, outdoor and automotive applications.